Article(id=1276601015067612087, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1276600957765021779, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1000-2561.2024.06.009, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1687795200000, receivedDateStr=2023-06-27, revisedDate=1697472000000, revisedDateStr=2023-10-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1782295000092, onlineDateStr=2026-06-24, pubDate=1719244800000, pubDateStr=2024-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1782295000092, onlineIssueDateStr=2026-06-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1782295000092, creator=13701087609, updateTime=1782295000092, updator=13701087609, issue=Issue{id=1276600957765021779, tenantId=1146029695717560320, journalId=1235980609244409860, year='2024', volume='45', issue='6', pageStart='1095', pageEnd='1302', issueExtLink='null', onlineDate='null', pubDate='1719244800000', pubDateStr='2024-06-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1782294986430, creator='13701087609', updateTime=1782348406834, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1276825019267285043, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1276600957765021779, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1276825019271479348, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1276600957765021779, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1175, endPage=1183, ext={EN=ArticleExt(id=1276601015365407673, articleId=1276601015067612087, tenantId=1146029695717560320, journalId=1235980609244409860, language=EN, title=Establishment of Embryogenic Callus Induction and Regeneration System for Phalaenopsis-hybrid Dendrobium, columnId=1236256430060261740, journalTitle=Chinese Journal of Tropical Crops, columnName=Germplasm Resources, Genetics & Breeding, runingTitle=null, highlight=null, articleAbstract=

Phalaenopsis-hybrid Dendrobium is an important ornamental plant in tropical area and has high market values, with beautiful flower appearance and abundant flower colors. In this study, the protocorms and young seedling’s stem segments of commercial varieties, Den. Yaya Victoria, Den. Swirl and Den. Sonia Hiasakul, were used as the explants. The effects of different phytohormone combination on embryogenic callus induction, adventitious bud differentiation and plantlet regeneration were investigated. During the embryogenic callus (EC) induction stage, the best induction explants were protocorms and 2-month-old seedling stem segments and EC could be obtained after 30 days culture in dark condition. The best medium for EC induction of was MSD (MS+30 g/L glucose+1 g/L Hyponex+8 g/L agar) as the basic medium with 0.5 mg/L KT and 0.2-0.5 mg/L 2,4-D. The highest average induction rate of EC was 31.11%, 22.78%, and 50% for Den. Yaya Victoria, Den. Swirl and Den. Sonia Hiasakul, and the induction time for Den. Yaya Victoria was only 15 days from explants to EC. The best proliferation medium was MSD+0.5 mg/L IBA+0.5 mg/L KT, which maintaining EC in good condition without differentiation and the multiplication rate was 0.9. The best medium for differentiation was 1/2 MS+0.5 mg/L IBA+0.15 mg/L KT under light condition of 16 h one day, EC quickly differentiating and forming 2-3 leaf adventitious buds within 30 days, and finally regenerating into plantlet after 60 days in the same medium. The best rooting medium was 1/2 MS+30 g/L sugar+0.5 mg/L NAA+8 g/L agar, with rooting rate 100% and five roots in length 1.3 cm per plantlet. In this research, the EC induction, proliferation and differentiation media have a wide-spectrum and the EC regeneration pathway could lay a solid foundation for further molecular breeding of Phalaenopsis-hybrid Dendrobium.

, authors=null, authorsList=Zhiqing LI, Yamei LI, Chonghui LI, Junmei YIN, authorCompany=null, correspAuthors=Yamei LI, Junmei YIN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1276601019060589513, articleId=1276601015067612087, tenantId=1146029695717560320, journalId=1235980609244409860, language=CN, title=秋石斛胚性愈伤组织诱导及再生体系的建立, columnId=1236256430219645304, journalTitle=热带作物学报, columnName=种质资源与遗传育种, runingTitle=null, highlight=null, articleAbstract=

秋石斛(Phalaenopsis-hybrid Dendrobium)花姿优美、花色丰富,是热区重要观赏植物,具有极高的产业价值。本研究以秋石斛杂交种迷你(Den. Yaya Victoria)、水蜜桃(Den. Swirl)、三亚阳光(Den. Sonia Hiasakul)原球茎和无菌苗幼嫩茎段为外植体,探讨不同植物生长调节剂组合对不同品种秋石斛胚性愈伤诱导、不定芽分化及植株再生的影响。结果表明:在胚性愈伤组织诱导阶段,原球茎和生长2个月的幼苗茎段作为外植体诱导效果最佳,暗培养30 d即可获得胚性愈伤。3个品种的愈伤组织诱导最佳培养基是以MSD(MS+30 g/L葡萄糖+1 g/L花宝1号+8 g/L琼脂)为基本培养基,添加0.5 mg/L KT和0.2~0.5 mg/L 2,4-D。迷你、水蜜桃、三亚阳光的胚性愈伤诱导率最高分别为31.11%、22.78%和50%,其中迷你品种仅需15 d即可获得胚性愈伤。最佳胚性愈伤增殖培养基为MSD+0.5 mg/L IBA+ 0.5 mg/L KT,胚性愈伤状态保持良好且不发生分化,增殖倍数0.9。最佳分化培养基为1/2 MS+0.5 mg/L IBA+0.15 mg/L KT,在光照条件下,接种后的胚性愈伤组织能够快速诱导形成芽点,30 d内分化形成2~3片叶的幼苗,相同培养基中保持60 d能够自行生根获得完整再生苗。最佳生根培养基为1/2 MS+30 g/L蔗糖+0.5 mg/L NAA+8 g/L琼脂,生根率为100%,平均生根数5条,根长约1.3 cm。本研究所使用的胚性愈伤组织诱导、增殖和分化培养基具有一定的广谱性,可为后续秋石斛胚再生途径及分子育种研究奠定基础。

, authors=

李志晴(1999—),女,硕士研究生,研究方向:观赏园艺学。

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* 尹俊梅(YIN Junmei),E-mail:
李亚梅(LI Yamei),E-mail:
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李志晴(1999—),女,硕士研究生,研究方向:观赏园艺学。

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李志晴(1999—),女,硕士研究生,研究方向:观赏园艺学。

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3.Engineering Technology Research Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, Danzhou, Hainan 571737, China
5.Haikou Experiment Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1276824349944451335, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, authorId=1276824349755707650, language=CN, stringName=李亚梅, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=2, 3, 5, *, address=2.中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创制重点实验室/海南省热带作物资源遗传改良与创新重点实验室,海南海口 571101
3.海南省热带观赏植物种质创新利用工程技术研究中心,海南儋州 571737
5.中国热带农业科学院海口实验站,海南海口 571101, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1276824346744197356, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, xref=2., ext=[AuthorCompanyExt(id=1276824346756780269, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824346744197356, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.Tropical Crop Germplasm Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture & Rural Affairs / Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou, Hainan 571101, China), AuthorCompanyExt(id=1276824346769363182, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824346744197356, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创制重点实验室/海南省热带作物资源遗传改良与创新重点实验室,海南海口 571101)]), AuthorCompany(id=1276824346853249264, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, xref=3., ext=[AuthorCompanyExt(id=1276824346861637873, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824346853249264, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.Engineering Technology Research Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, Danzhou, Hainan 571737, China), AuthorCompanyExt(id=1276824346870026482, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824346853249264, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.海南省热带观赏植物种质创新利用工程技术研究中心,海南儋州 571737)]), AuthorCompany(id=1276824347046187256, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, xref=5., ext=[AuthorCompanyExt(id=1276824347310428409, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824347046187256, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=5.Haikou Experiment Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China), AuthorCompanyExt(id=1276824347323011322, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824347046187256, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=5.中国热带农业科学院海口实验站,海南海口 571101)])]), Author(id=1276824350263218441, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1276824350363881740, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, authorId=1276824350263218441, language=EN, stringName=Chonghui LI, firstName=Chonghui, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=2, 3, address=2.Tropical Crop Germplasm Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture & Rural Affairs / Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou, Hainan 571101, China
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province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=5.Haikou Experiment Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China), AuthorCompanyExt(id=1276824347323011322, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, companyId=1276824347046187256, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=5.中国热带农业科学院海口实验站,海南海口 571101)])], figs=[ArticleFig(id=1276824354986004765, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 1, caption=Different growth stages in vitro of Phalaenopsis-hybrid Dendrobium Yaya Victoria, figureFileSmall=hTwSch4YeFEHTK1cz8DNuQ==, figureFileBig=wCZxPP0V0FijDPgwlaMLRA==, tableContent=null), ArticleFig(id=1276824355329937694, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图1, caption=秋石斛迷你品种组培苗不同生长时期, figureFileSmall=hTwSch4YeFEHTK1cz8DNuQ==, figureFileBig=wCZxPP0V0FijDPgwlaMLRA==, tableContent=null), ArticleFig(id=1276824355434795296, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 2, caption=Embryogenic callus (ECs) induce from different cultivars of Phalaenopsis-hybrid Dendrobium, figureFileSmall=5ZMAtX2eB8BGnco0G+/atg==, figureFileBig=619dxNlxvQ916K+KsSjEzg==, tableContent=null), ArticleFig(id=1276824355497709857, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图2, caption=不同品种秋石斛胚性愈伤诱导, figureFileSmall=5ZMAtX2eB8BGnco0G+/atg==, figureFileBig=619dxNlxvQ916K+KsSjEzg==, tableContent=null), ArticleFig(id=1276824355707425058, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 3, caption=Embryogenic callus (ECs) proliferation of Den. Sonia Hiasakul, figureFileSmall=oQaGmewAXXaza1aYV0V+8Q==, figureFileBig=11Va2NXiLkBKi6C6ErROsA==, tableContent=null), ArticleFig(id=1276824355787116835, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图3, caption=三亚阳光胚性愈伤增殖, figureFileSmall=oQaGmewAXXaza1aYV0V+8Q==, figureFileBig=11Va2NXiLkBKi6C6ErROsA==, tableContent=null), ArticleFig(id=1276824355858420004, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 4, caption=The process of differentiation and regeneration of Phalaenopsis-hybrid Dendrobium (Den. Sonia Hiasakul)

A: Adventive bud from 30 d differentiation of embryogenic callus; B: Regeneration plant comes from 60d differentiation.

, figureFileSmall=mB1Nmu8J/rYibkLe+ySKuw==, figureFileBig=beORWk7N+/lvWsNLuUCXiw==, tableContent=null), ArticleFig(id=1276824355933917477, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图4, caption=秋石斛分化再生过程(三亚阳光)

A:分化30 d不定芽;B:分化60 d再生植株。

, figureFileSmall=mB1Nmu8J/rYibkLe+ySKuw==, figureFileBig=beORWk7N+/lvWsNLuUCXiw==, tableContent=null), ArticleFig(id=1276824355988443430, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 5, caption=Rooting of Phalaenopsis-hybrid Dendrobium adventitious shoots, figureFileSmall=jGwDtnYneXS31i0UmU3lXA==, figureFileBig=E0uGh2i65JXkspxzzQyFKw==, tableContent=null), ArticleFig(id=1276824356055552295, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图5, caption=秋石斛不定芽生根, figureFileSmall=jGwDtnYneXS31i0UmU3lXA==, figureFileBig=E0uGh2i65JXkspxzzQyFKw==, tableContent=null), ArticleFig(id=1276824356139438376, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Fig. 6, caption=Schematic diagrams for Den. Yaya Victoria embryogenic callus induction and somatic embryo regeneration

A: Victoria pod and seed; B: Formation of protocorms after 1 month of seed germination; C: Sterile seedlings growing for 2-3 months (red box indicates explant use for ECs induction); D: Embryogenic callus obtained after 30 days of induction; E: ECs proliferation; F: ECs regeneration for 30 days to obtain somatic embryos; G: Plantlet rooting.

, figureFileSmall=ItykoL6UiH5Kg7tO7G9aqA==, figureFileBig=YT7vMR3fIZpUm0pePF1ftg==, tableContent=null), ArticleFig(id=1276824356206547241, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=图6, caption=秋石斛迷你胚性愈伤诱导及植株再生流程图

A:果荚及种子;B:种子萌发1月后原球茎;C:2~3个月无菌幼苗(红色框表示诱导胚性愈伤外植体);D:诱导30 d后获得胚性愈伤;E:胚性愈伤增殖;F:胚性愈伤再生30 d获得幼胚;G:秋石斛再生苗生根。

, figureFileSmall=ItykoL6UiH5Kg7tO7G9aqA==, figureFileBig=YT7vMR3fIZpUm0pePF1ftg==, tableContent=null), ArticleFig(id=1276824356277850410, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Tab. 1, caption=

Effects of explants on embryogenic callus (ECs) induction rate of Phalaenopsis-hybrid Dendrobium

, figureFileSmall=null, figureFileBig=null, tableContent=
品种Cultivar外植体Explant外植体接种数No. of explants胚性愈伤诱导数No. of ECs胚性愈伤诱导率ECs induction rate/%
迷你茎段11200.50±0.71b0.42±0.59b
茎段212035.00±1.41a29.17±1.18a
原球茎12037.50±0.71a31.25±0.59a
水蜜桃茎段11200.00±0.00c0.00±0.00c
茎段212030.00±2.83b25.00±2.36b
原球茎12037.00±1.41a30.84±1.18a
), ArticleFig(id=1276824356349153579, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=表1, caption=

外植体对秋石斛胚性愈伤诱导率的影响

, figureFileSmall=null, figureFileBig=null, tableContent=
品种Cultivar外植体Explant外植体接种数No. of explants胚性愈伤诱导数No. of ECs胚性愈伤诱导率ECs induction rate/%
迷你茎段11200.50±0.71b0.42±0.59b
茎段212035.00±1.41a29.17±1.18a
原球茎12037.50±0.71a31.25±0.59a
水蜜桃茎段11200.00±0.00c0.00±0.00c
茎段212030.00±2.83b25.00±2.36b
原球茎12037.00±1.41a30.84±1.18a
), ArticleFig(id=1276824356420456748, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Tab. 2, caption=

Effects of 2,4-D on embryogenic callus (ECs) induction and induction rate from stem segments of Phalaenopsis-hybrid Dendrobium

, figureFileSmall=null, figureFileBig=null, tableContent=
培养基Medium2,4-D/(mg·L–1)KT/(mg·L–1)外植体接种数No. of explant迷你Den. Yaya victoria水蜜桃Den. Swirl三亚阳光Den. Sonia Hiasakul
胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%
CIM10.10.59024.50±2.12ab27.23±2.35ab13.00±2.83ab14.45±3.15ab25.00±4.24c27.78±4.72c
CIM20.20.59028.00±1.41a31.11±1.57a7.00±1.41b7.78±1.57b25.50±2.12c28.34±2.35c
CIM30.30.59023.00±1.41b25.56±1.58b20.50±6.36a22.78±7.07a28.50±0.71bc31.67±0.78bc
CIM40.40.59013.00±2.83c14.45±3.15c5.50±0.71b6.12±0.78b34.00±2.83b37.78±3.14b
CIM50.50.5908.50±0.71d9.45±0.78d4.00±0.00b4.44±0.00b45.00±2.83a50.00±3.14a
CIM610.5902.00±1.41e2.22±1.57e6.00±5.66b6.67±6.29b19.00±1.41d21.11±1.57d
CIM720.5900.50±0.71e0.56±0.78e4.00±5.66b4.45±6.29b9.50±0.71e10.56±0.78e
), ArticleFig(id=1276824356500148525, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=表2, caption=

2,4-D对秋石斛幼嫩茎段胚性愈伤诱导及诱导率的影响

, figureFileSmall=null, figureFileBig=null, tableContent=
培养基Medium2,4-D/(mg·L–1)KT/(mg·L–1)外植体接种数No. of explant迷你Den. Yaya victoria水蜜桃Den. Swirl三亚阳光Den. Sonia Hiasakul
胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%胚性愈伤诱导数No. of ECs平均诱导率Induction rate/%
CIM10.10.59024.50±2.12ab27.23±2.35ab13.00±2.83ab14.45±3.15ab25.00±4.24c27.78±4.72c
CIM20.20.59028.00±1.41a31.11±1.57a7.00±1.41b7.78±1.57b25.50±2.12c28.34±2.35c
CIM30.30.59023.00±1.41b25.56±1.58b20.50±6.36a22.78±7.07a28.50±0.71bc31.67±0.78bc
CIM40.40.59013.00±2.83c14.45±3.15c5.50±0.71b6.12±0.78b34.00±2.83b37.78±3.14b
CIM50.50.5908.50±0.71d9.45±0.78d4.00±0.00b4.44±0.00b45.00±2.83a50.00±3.14a
CIM610.5902.00±1.41e2.22±1.57e6.00±5.66b6.67±6.29b19.00±1.41d21.11±1.57d
CIM720.5900.50±0.71e0.56±0.78e4.00±5.66b4.45±6.29b9.50±0.71e10.56±0.78e
), ArticleFig(id=1276824356592423214, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Tab. 3, caption=

Effects of different hormone combinations on Embryogenic Callus (ECs) proliferation from Stem Segments of Phalaenopsis-hybrid Dendrobium

, figureFileSmall=null, figureFileBig=null, tableContent=
培养基Medium植物生长调节剂组合Hormone combinationECs接种数No. of ECs迷你Den. Yaya victoria水蜜桃Den. Swirl三亚阳光Den. Sonia Hiasakul
增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%
P10.1 mg/L 2,4-D0.5 mg/L KT900.93±0.23a72.23±7.86a0.38±0.10b58.34±3.92a0.42±0.30a52.23±7.86b
P20.1 mg/L KT900.51±0.15b50.00±7.86b0.42±0.18b62.78±7.07a0.52±0.39a67.23±2.35a
P30.5 mg/L IBA0.15 mg/L KT900.37±0.16b26.11±3.93c0.58±0.35ab31.11±3.14b0.69±0.56a38.34±3.92bc
P40.5 mg/L KT900.36±0.22b30.56±3.92c0.74±0.44a28.45±4.08b0.90±0.68a26.11±5.50c
), ArticleFig(id=1276824356676309295, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=表3, caption=

不同植物生长调节剂组合对秋石斛幼嫩茎段胚性愈伤增殖的影响

, figureFileSmall=null, figureFileBig=null, tableContent=
培养基Medium植物生长调节剂组合Hormone combinationECs接种数No. of ECs迷你Den. Yaya victoria水蜜桃Den. Swirl三亚阳光Den. Sonia Hiasakul
增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%增殖倍数Multiplication factor不定芽分化率Adventitious bud differentiation rate/%
P10.1 mg/L 2,4-D0.5 mg/L KT900.93±0.23a72.23±7.86a0.38±0.10b58.34±3.92a0.42±0.30a52.23±7.86b
P20.1 mg/L KT900.51±0.15b50.00±7.86b0.42±0.18b62.78±7.07a0.52±0.39a67.23±2.35a
P30.5 mg/L IBA0.15 mg/L KT900.37±0.16b26.11±3.93c0.58±0.35ab31.11±3.14b0.69±0.56a38.34±3.92bc
P40.5 mg/L KT900.36±0.22b30.56±3.92c0.74±0.44a28.45±4.08b0.90±0.68a26.11±5.50c
), ArticleFig(id=1276824356739223856, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Tab. 4, caption=

Effects of different hormone combinations on embryogenic callus differentiation to different cultivar of Phalaenopsis-hybrid Dendrobium

, figureFileSmall=null, figureFileBig=null, tableContent=
分化培养基Differentiation medium品种Cultivar胚性愈伤数No. of ECs不定芽胚性愈伤数No. of ECs differentiation胚性愈伤分化率Rate of ECs differentiation/%植株再生数No. of plantlets regeneration per ECs
F1迷你2421.00±1.41a87.50±5.90a6.00±2.30a
水蜜桃2422.00±1.41a91.67±5.89a3.92±2.15a
三亚阳光2720.50±0.71a85.42±2.95a4.08±1.24a
F2迷你2424.00±0.00a100.00±0.00a6.92±1.44a
水蜜桃2422.50±0.71a93.75±2.94a5.00±0.95a
三亚阳光2723.50±0.71a97.92±2.95a5.00±2.30a
), ArticleFig(id=1276824356818915633, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=表4, caption=

不同植物生长调节剂组合对不同品种秋石斛胚性愈伤分化的影响

, figureFileSmall=null, figureFileBig=null, tableContent=
分化培养基Differentiation medium品种Cultivar胚性愈伤数No. of ECs不定芽胚性愈伤数No. of ECs differentiation胚性愈伤分化率Rate of ECs differentiation/%植株再生数No. of plantlets regeneration per ECs
F1迷你2421.00±1.41a87.50±5.90a6.00±2.30a
水蜜桃2422.00±1.41a91.67±5.89a3.92±2.15a
三亚阳光2720.50±0.71a85.42±2.95a4.08±1.24a
F2迷你2424.00±0.00a100.00±0.00a6.92±1.44a
水蜜桃2422.50±0.71a93.75±2.94a5.00±0.95a
三亚阳光2723.50±0.71a97.92±2.95a5.00±2.30a
), ArticleFig(id=1276824356881830194, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=EN, label=Tab. 5, caption=

Effect of NAA and KT on the rooting of adventitious shoots to different cultivar of Phalaenopsis-hybrid Dendrobium

, figureFileSmall=null, figureFileBig=null, tableContent=
生根培养基Rooting mediumNAA/(mg·L–1)KT/(mg·L–1)品种Cultivar生根率Rooting rate/%平均根数Average rooting number平均根长Average rooting length/cm
R1迷你1005.30±1.06a1.45±0.41a
0.50水蜜桃1005.00±1.33a1.42±0.39a
三亚阳光1007.90±1.10a1.12±0.14a
R2迷你1004.20±1.03a1.39±0.35a
0.50.5水蜜桃1004.30±1.25a1.37±0.35a
三亚阳光1005.10±2.51a1.02±0.28a
), ArticleFig(id=1276824356965716275, tenantId=1146029695717560320, journalId=1235980609244409860, articleId=1276601015067612087, language=CN, label=表5, caption=

NAA和KT对不同品种秋石斛不定芽生根的影响

, figureFileSmall=null, figureFileBig=null, tableContent=
生根培养基Rooting mediumNAA/(mg·L–1)KT/(mg·L–1)品种Cultivar生根率Rooting rate/%平均根数Average rooting number平均根长Average rooting length/cm
R1迷你1005.30±1.06a1.45±0.41a
0.50水蜜桃1005.00±1.33a1.42±0.39a
三亚阳光1007.90±1.10a1.12±0.14a
R2迷你1004.20±1.03a1.39±0.35a
0.50.5水蜜桃1004.30±1.25a1.37±0.35a
三亚阳光1005.10±2.51a1.02±0.28a
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秋石斛胚性愈伤组织诱导及再生体系的建立
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李志晴 1, 2 , 李亚梅 2, 3, 5, * , 李崇晖 2, 3 , 尹俊梅 2, 3, 4, *
热带作物学报 | 种质资源与遗传育种 2024,45(6): 1175-1183
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热带作物学报 |种质资源与遗传育种 2024 , 45 (6) : 1175 -1183
秋石斛胚性愈伤组织诱导及再生体系的建立
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李志晴1, 2, 李亚梅2, 3, 5, * , 李崇晖2, 3, 尹俊梅2, 3, 4, *
作者信息
  • 1.海南大学热带农林学院,海南海口 570228
  • 2.中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创制重点实验室/海南省热带作物资源遗传改良与创新重点实验室,海南海口 571101
  • 3.海南省热带观赏植物种质创新利用工程技术研究中心,海南儋州 571737
  • 4.中国热带农业科学院三亚研究院,海南三亚 572330
  • 5.中国热带农业科学院海口实验站,海南海口 571101
通讯作者:
* 尹俊梅(YIN Junmei),E-mail:
李亚梅(LI Yamei),E-mail:
Establishment of Embryogenic Callus Induction and Regeneration System for Phalaenopsis-hybrid Dendrobium
Zhiqing LI1, 2, Yamei LI2, 3, 5, * , Chonghui LI2, 3, Junmei YIN2, 3, 4, *
Affiliations
  • 1.School of Tropical Agriculture and Forestry, Hainan University, Haikou, Hainan 570228, China
  • 2.Tropical Crop Germplasm Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture & Rural Affairs / Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou, Hainan 571101, China
  • 3.Engineering Technology Research Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, Danzhou, Hainan 571737, China
  • 4.Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya, Hainan 572330, China
  • 5.Haikou Experiment Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
出版时间: 2024-06-25 doi: 10.3969/j.issn.1000-2561.2024.06.009
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秋石斛(Phalaenopsis-hybrid Dendrobium)花姿优美、花色丰富,是热区重要观赏植物,具有极高的产业价值。本研究以秋石斛杂交种迷你(Den. Yaya Victoria)、水蜜桃(Den. Swirl)、三亚阳光(Den. Sonia Hiasakul)原球茎和无菌苗幼嫩茎段为外植体,探讨不同植物生长调节剂组合对不同品种秋石斛胚性愈伤诱导、不定芽分化及植株再生的影响。结果表明:在胚性愈伤组织诱导阶段,原球茎和生长2个月的幼苗茎段作为外植体诱导效果最佳,暗培养30 d即可获得胚性愈伤。3个品种的愈伤组织诱导最佳培养基是以MSD(MS+30 g/L葡萄糖+1 g/L花宝1号+8 g/L琼脂)为基本培养基,添加0.5 mg/L KT和0.2~0.5 mg/L 2,4-D。迷你、水蜜桃、三亚阳光的胚性愈伤诱导率最高分别为31.11%、22.78%和50%,其中迷你品种仅需15 d即可获得胚性愈伤。最佳胚性愈伤增殖培养基为MSD+0.5 mg/L IBA+ 0.5 mg/L KT,胚性愈伤状态保持良好且不发生分化,增殖倍数0.9。最佳分化培养基为1/2 MS+0.5 mg/L IBA+0.15 mg/L KT,在光照条件下,接种后的胚性愈伤组织能够快速诱导形成芽点,30 d内分化形成2~3片叶的幼苗,相同培养基中保持60 d能够自行生根获得完整再生苗。最佳生根培养基为1/2 MS+30 g/L蔗糖+0.5 mg/L NAA+8 g/L琼脂,生根率为100%,平均生根数5条,根长约1.3 cm。本研究所使用的胚性愈伤组织诱导、增殖和分化培养基具有一定的广谱性,可为后续秋石斛胚再生途径及分子育种研究奠定基础。

秋石斛  /  茎段  /  胚性愈伤  /  植株再生

Phalaenopsis-hybrid Dendrobium is an important ornamental plant in tropical area and has high market values, with beautiful flower appearance and abundant flower colors. In this study, the protocorms and young seedling’s stem segments of commercial varieties, Den. Yaya Victoria, Den. Swirl and Den. Sonia Hiasakul, were used as the explants. The effects of different phytohormone combination on embryogenic callus induction, adventitious bud differentiation and plantlet regeneration were investigated. During the embryogenic callus (EC) induction stage, the best induction explants were protocorms and 2-month-old seedling stem segments and EC could be obtained after 30 days culture in dark condition. The best medium for EC induction of was MSD (MS+30 g/L glucose+1 g/L Hyponex+8 g/L agar) as the basic medium with 0.5 mg/L KT and 0.2-0.5 mg/L 2,4-D. The highest average induction rate of EC was 31.11%, 22.78%, and 50% for Den. Yaya Victoria, Den. Swirl and Den. Sonia Hiasakul, and the induction time for Den. Yaya Victoria was only 15 days from explants to EC. The best proliferation medium was MSD+0.5 mg/L IBA+0.5 mg/L KT, which maintaining EC in good condition without differentiation and the multiplication rate was 0.9. The best medium for differentiation was 1/2 MS+0.5 mg/L IBA+0.15 mg/L KT under light condition of 16 h one day, EC quickly differentiating and forming 2-3 leaf adventitious buds within 30 days, and finally regenerating into plantlet after 60 days in the same medium. The best rooting medium was 1/2 MS+30 g/L sugar+0.5 mg/L NAA+8 g/L agar, with rooting rate 100% and five roots in length 1.3 cm per plantlet. In this research, the EC induction, proliferation and differentiation media have a wide-spectrum and the EC regeneration pathway could lay a solid foundation for further molecular breeding of Phalaenopsis-hybrid Dendrobium.

Phalaenopsis-hybrid Dendrobium  /  stem segments  /  embryogenic callus  /  plant regeneration
李志晴, 李亚梅, 李崇晖, 尹俊梅. 秋石斛胚性愈伤组织诱导及再生体系的建立. 热带作物学报, 2024 , 45 (6) : 1175 -1183 . DOI: 10.3969/j.issn.1000-2561.2024.06.009
Zhiqing LI, Yamei LI, Chonghui LI, Junmei YIN. Establishment of Embryogenic Callus Induction and Regeneration System for Phalaenopsis-hybrid Dendrobium[J]. Chinese Journal of Tropical Crops, 2024 , 45 (6) : 1175 -1183 . DOI: 10.3969/j.issn.1000-2561.2024.06.009
秋石斛(Phalaenopsis-type Dendrobium)花姿优美,形似纷飞的蝴蝶,花色丰富,喜欢在高温、多湿、阳光充足的热带环境中生长和开花,花期长且主要集中在秋冬季,是我国花卉市场常见的盆栽及切花植物。海南省因具有得天独厚的地理优势,已发展为我国秋石斛的主产区[1]。近年来,秋石斛盆花在海南的栽种面积逐年扩大,据统计,海南每年出货量达到500万盆以上,占广州该类花卉市场份额的95%以上。目前,我国秋石斛新品种培育主要通过杂交育种和诱变育种实现,而建立高效的胚性愈伤组织再生体系将有利于基因工程育种研究。
秋石斛常用组织培养方法是以种子播种获得原球茎,再以无菌苗的茎段为外植体,诱导、分化、生根获得再生植株是进行工厂化育苗的理想手段[2]。此外,以优良株系的茎段、茎尖、叶片、花梗等为外植体,经过消毒处理,诱导类原球茎分化不定芽或诱导丛生芽进行增殖、生根,从而获得大量组培苗,也为秋石斛种苗繁育提供了技术支持[3-9]。兰科植物现有的遗传转化方法构建主要以类原球茎为外植体,即通过器官发生途径获得转基因植株,由于原球茎已处于分化阶段,因此该方法获得纯合转基因植株相对困难[10-11],相比之下,胚性愈伤再生途径遗传转化产生的嵌合体较少,广泛应用于作物基因工程育种[12]。本研究以秋石斛杂交种迷你(Den. Yaya Victoria)、水蜜桃(Den. Swirl)和三亚阳光(Den. Sonia Hiasakul)来源的原球茎、无菌幼苗茎段为外植体,通过不同的基本培养基、植物生长调节剂组合测试,进行胚性愈伤诱导、增殖、分化及生根研究,以期建立高效的秋石斛胚性愈伤诱导及胚发生途径再生体系,为秋石斛多倍体育种、体细胞杂交、突变体和无性系变异株系获得及转基因分子育种奠定基础。
本试验供试品种迷你、水蜜桃和三亚阳光果荚来源于中国热带农业科学院热带花卉研究中心种质圃。基本培养基MS(Murashige and Skoog)购于国药集团。植物生长调节剂2,4-D、Kinetin、6-BA、NAA和IBA购于西格玛奥德里奇(上海)贸易有限公司。
除特殊说明外,本研究所用的秋石斛组织培养基本培养基(MSD):MS+30 g/L葡萄糖+1 g/L花宝1号+8 g/L琼脂,pH为5.8~6.0,121 ℃高温条件下灭菌20 min。组织培养条件:温度25~ 28 ℃,环境相对湿度70%~80%,光照培养的光周期16 h/d,光照强度100 μmol/(m2·s)。
取秋石斛的成熟果荚置于无菌组培瓶中,2%NaClO3消毒15 min,无菌水清洗3~5遍;转入95%乙醇润洗2~3 s后用酒精灯烧去多余乙醇,重复该步骤2~3次;最后将消毒后的果荚置于无菌平皿中,切开果荚,用无菌手术刀将种子接种至种子培养基(1/2 MS+3 g/L花宝1号+2 g/L蛋白胨+0.5 g/L活性炭+30 g/L蔗糖+8 g/L卡拉胶),1个月后即可获得原球茎,2~3个月后获得2~3叶期无菌幼苗。
选用迷你、水蜜桃和三亚阳光原球茎(生长1~2个月)、茎段2(2~3叶期,生长2~3个月,有2~3片叶)和茎段1(4~5叶期,生长4~5个月,有4~5片叶)的无菌苗茎段作为外植体进行胚性愈伤组织诱导。
用手术刀划伤原球茎,无菌苗去除叶片取茎段幼嫩部分横切,分别置于胚性愈伤诱导培养基CIM1~CIM7(MSD+0.5 mg/L KT+0.1/0.2/0.3/0.4/0.5/1.0/2.0 mg/L 2,4-D)中暗培养诱导胚性愈伤组织,每个处理接种10皿,每皿9个外植体,30 d后观察诱导效果并统计胚性愈伤诱导率,筛选出最适宜胚性愈伤诱导的培养基。以上每组实验最少重复2次,胚性愈伤诱导率=(诱导出胚性愈伤外植体数/接种外植体数)×100%。
将诱导获得的胚性愈伤挑出,去除芽和多余组织,转入胚性愈伤增殖培养基P1、P2、P3、P4中暗培养,30 d为1个继代周期,统计胚性愈伤增殖量并观察是否发生分化。胚性愈伤增殖倍数=培养30 d后每皿胚性愈伤的体积/接种时胚性愈伤体积。胚性愈伤增殖培养基分别为P1:MSD+0.1 mg/L 2,4-D+0.5 mg/L KT;P2:MSD+0.1 mg/L 2,4-D+0.1 mg/L KT;P3:MSD+ 0.5 mg/L IBA+0.15 mg/L KT;P4:MSD+0.5 mg/L IBA+0.5 mg/L KT。
挑取嫩黄致密、生长状态一致的胚性愈伤转入如下F1和F2分化培养基中,30 d后观察胚性愈伤分化情况并统计分化率,60 d后统计植株再生数。分化率=(分化出不定芽胚性愈伤数/胚性愈伤数)×100%;植株再生数=(再生不定芽胚性愈伤数/胚性愈伤数)。测试用分化培养基分别为F1:1/2 MS+3 mg/L 6-BA+1 mg/L NAA;F2:1/2 MS+0.5 mg/L IBA+ 0.15 mg/L KT。
将生长茁壮、体型良好的不定芽转入R1和R2生根培养基中进行生根试验,观察不同生根培养基对秋石斛不定芽生根率、生根数及根长的影响。待再生植株长至4~5 cm后转入以苔藓为基质的培养基中炼苗。测试用生根培养基分别为R1:1/2 MS+30 g/L蔗糖+0.5 mg/L NAA;R2:1/2 MS+30 g/L蔗糖+0.5 mg/L NAA+ 0.5 mg/L KT。
试验数据采用统计学软件SPSS 25进行显著性分析。
以生长无菌苗茎段1为外植体进行胚性愈伤诱导(图1),一个月后观察发现,迷你、水蜜桃胚性愈伤组织平均诱导率分别为0.42%和0,且外植体容易诱导出芽,说明生长时间较长的无菌苗茎段不适于作为胚性愈伤诱导的外植体。采用原球茎和无菌苗茎段2为外植体,发现脱分化效果好,胚性愈伤诱导率高,诱导率约30%(表1)。不仅如此,迷你品种从接种到获得胚性愈伤周期短,培养15 d后即出现胚性愈伤萌动。本研究结果发现,以原球茎和无菌苗茎段2为外植体不仅可以显著提高胚性愈伤诱导效率,还可以缩短诱导周期。
将无菌幼苗茎段2置于不同愈伤组织诱导培养基上,1周内未观察到胚性愈伤萌动现象,2周内开始出现白色近透明的微小颗粒,一个月内,这些微小颗粒随着培养基中2,4-D浓度差异而发生不同的变化。在高浓度2,4-D(1、2 mg/L 2,4-D)培养基上,微小颗粒逐渐褐化或变成灰白色,小部分茎段诱导出不定芽,大部分茎段不能诱导出愈伤组织或不定芽,直接褐化或转化为灰白色。继续放置60 d后,观察发现有少量新的愈伤从褐化的茎段上长出,可能是随着培养时间延长,2,4-D的浓度降低或功能活性减弱,对外植体的毒害作用减少。该研究结果说明,高浓度2,4-D并不适合秋石斛胚性愈伤诱导,外植体容易出现褐化、死亡现象。
在低浓度2,4-D(0.1~0.5 mg/L 2,4-D)培养基上,可以诱导出不定芽、白色或淡黄色的胚性愈伤组织。30 d后观察统计,结果显示迷你在CIM2(MSD+0.2 mg/L 2,4-D+0.5 mg/L Kinetin)培养基中的诱导效果最佳(图2),胚性愈伤诱导率为31.11%(表2),但0.1 mg/L 2,4-D与0.2 mg/L 2,4-D诱导效果无显著差异;水蜜桃在CIM3(MSD+ 0.3 mg/L 2,4-D+0.5 mg/L Kinetin)上形成颗粒状聚集胚性愈伤组织,诱导率最高可以达到22.78%;三亚阳光在CIM5(0.5 mg/L 2,4-D+ 0.5 mg/L Kinetin)培养基中的诱导效果最佳,平均诱导率高达50%,CIM3-5中的平均诱导率均高于30%。以上结果表明,2,4-D浓度范围在0.1~ 0.5 mg/L间均有利于秋石斛胚性愈伤组织诱导。
为进一步增殖并优化胚性愈伤的状态,将诱导30 d左右的胚性愈伤转入P1、P2、P3、P4增殖培养基中进行增殖研究。胚性愈伤在4种培养基中继代1周时并无明显生长变化,2周后胚性愈伤开始出现增殖变大,3周后一些胚性愈伤表面出现芽点,同时愈伤颜色变得更为嫩黄。以三亚阳光为例,胚性愈伤在P4(MSD+0.5 mg/L IBA+ 0.5 mg/L KT)中继代获得的胚性愈伤(ECs)颜色嫩黄、形态致密,该状态为胚性愈伤组织较佳状态;在P1(MSD+0.1 mg/L 2,4-D+0.5 mg/L KT)中出芽率较高,并伴随出现胚性愈伤褐化现象(图3)。从胚性愈伤形态上观察,IBA与KT生长调节剂组合对秋石斛胚性愈伤的增殖效果虽然一般,但基本能够保持愈伤不分化。
表3可知,4种培养基中的胚性愈伤增殖倍数因品种不同有所差异,但整体增殖倍数均不超过1。水蜜桃胚性愈伤在P4培养基中增殖倍数显著高于P1、P2,可见IBA与KT的组合优于2,4-D与KT;三亚阳光胚性愈伤在4种培养基上的增殖效果差异不显著,但P4培养基中胚性愈伤的增殖倍数依旧最高。水蜜桃愈伤在P4培养基中增殖倍数显著高于P1、P2,可见IBA与KT的组合较优于2,4-D与KT。从胚性愈伤不定芽分化情况观察,3个品种中,IBA与KT植物生长调节剂组合不定芽分化率均显著低于2,4-D与KT的组合。结果说明生长素IBA(吲哚丁酸)和细胞分裂素Kinetin组合有利于秋石斛胚性愈伤的增殖与保持。
研究表明培养基1/2 MS+2.0 mg/L 6-BA+ 1.0 mg/L NAA最有利于秋石斛顶芽和腋芽诱导原球茎,MS+3.0 mg/L 6-BA+1.0 mg/L NAA适合于原球茎增殖[5]。在此基础上,本研究将以上2种培养基进行融合改良,以1/2 MS为基本培养基,添加1 g/L花宝1号,采用3.0 mg/L 6-BA与1.0 mg/L NAA的生长调节剂组合。在进行胚性愈伤增殖过程中发现,0.5 mg/L IBA与0.15 mg/L KT的组合,在光照条件下,分化状态更佳。因此尝试应用IBA和KT生长调节剂组合进行胚性愈伤分化研究,将嫩黄、致密且状态一致的胚性愈伤分别接种到F1和F2培养基上,16 h/d光周期条件下比较胚性愈伤分化情况,结果显示胚性愈伤在F1和F2培养基中均可分化出不定芽(图4),60 d后即可分化获得形态完整、翠绿且生根的小苗。胚性愈伤在分化成不定芽的过程中,会先转变成类原球茎,然后迅速发展成不定芽,促进更多芽点的产生形成丛生芽。由表4可知,3种秋石斛胚性愈伤在F2培养基上的不定芽再生率均高于F1,平均每团愈伤出苗数多1株,但2种培养基的分化效果无显著差异。
生长素NAA和细胞分裂素KT对3种秋石斛不定芽生根的影响进行了研究。30 d后统计发现,单独使用NAA或NAA与KT组合使用均能使不定芽生根(表5图5),平均每株生根数在5根左右,根长约1.3 cm,2种生根培养基生根效果无显著差异。由此可见,是否添加KT不是影响秋石斛生根的主要因素,而采用0.5 mg/L NAA作为生根培养基较为合适。
从迷你品种可以看出,将果荚消毒后接种于苗培养基(图6A),待原球茎和幼苗形成后,手术刀处理原球茎或去除幼苗叶片与根部取幼茎为外植体(图6B),放入胚性愈伤诱导培养基,30 d后诱导获得嫩黄、致密胚性愈伤组织(图6C);然后将胚性愈伤切下,转入继代培养基中暗培养进行增殖,1~2个月后即可获得嫩黄、质地均一的胚性愈伤组织(图6D);将胚性愈伤转入分化培养基1个月后分化获得幼胚(图6E);继续培养2个月后获得幼苗,或转入生根培养基(苗培养基)30 d后获得生长状态良好胚性愈伤再生植株(图6F)。因此,建立了一套较为高效的秋石斛胚性愈伤诱导及植株再生方法。
秋石斛胚性愈伤再生体系构建需要综合评价不同品种基因型、外植体类型和外植体生长阶段,筛选出最适宜的品种作为实验品系。本研究最初选取了5个品种进行胚性愈伤诱导试验,其中原生种Dendrobium bigibbum胚性愈伤诱导耗时长,诱导率低;粉红女孩杂交种自交结实率虽高,但胚性愈伤诱导率低,仅在CIM3培养基中可诱导少量胚性愈伤。因此,这2个品种都不适合作为遗传转化研究材料。相比之下,三亚阳光杂交种胚性愈伤诱导、分化效果都非常好,但由于该品种自交不亲和性,转基因性状无法通过有性繁殖遗传到下一代;迷你、水蜜桃2个品种则最佳,不仅自交亲和,且易于与其他品种杂交,该结果有利于后续转基因研究中获得纯合株系并将外源基因渗入到其它品系。本研究采用生长2个月的原球茎为外植体,该外植体更为幼嫩,脱分化效果佳,更适合用于胚性愈伤诱导,应用该外植体显著提高了胚性愈伤的诱导效率。
生长素2,4-D常作为不同外植体体胚发生的主要诱导剂[13-17],植物内源生长素IBA的分布对体细胞发生至关重要[18]。本研究胚性愈伤诱导、增殖、体胚分化及再生均为不同生长素和细胞分裂素组合使用。胚性愈伤诱导时植物生长调节剂的最佳配比是0.1~0.5 mg/L 2,4-D组合0.5 mg/L KT;2,4-D是诱导出胚性愈伤的关键因素,这一结论与金青等[19]诱导霍山石斛愈伤组织相似。胚性愈伤增殖继代时采用0.5 mg/L IBA组合0.5 mg/L KT具有较好的增殖与保持效果,所获得的胚性愈伤嫩黄、致密,生长状态均一;在分化出芽时将细胞分裂素KT 0.15 mg/L与IBA 0.5 mg/L组合,可以较好的分化获得不定芽;最后利用0.5 mg/L NAA实现秋石斛快速生根。不同阶段使用不同生长素,也能促进胚性愈伤诱导及胚发生途径植株再生[20]
理论上,植物任何一部分均可以再生成完整植株,本研究中选用了不同外植体进行胚性愈伤诱导试验,结果发现在相同植物生长调节剂下,茎段诱导胚性效果最佳,且愈幼嫩的茎段对2,4-D\及KT愈敏感。分化过程中,胚性愈伤逐渐转化为类原球茎[21],从而形成大量不定芽。因此,在秋石斛中类原球茎与胚性愈伤相互之间是一个极易转变的过程,这是兰科植物中普遍存在的现象[22]。研究过程中还发现3种秋石斛胚性愈伤增殖效果一般,容易形成类原球茎,可能是抑制胚性愈伤增殖的主要原因,这一现象与大花蕙兰黄金小神童胚性愈伤诱导过程相似[23]
目前,关于石斛兰胚性愈伤诱导及再生的研究已有许多报道[13-141724-25],但秋石斛胚性愈伤途径再生的研究几乎未见报道。常见的石斛兰遗传转化通常以胚性愈伤或原球茎作为外植体[12]。相比原球茎,胚性愈伤作为转基因外植体则无需经过脱分化,可直接将外源基因转入干细胞分化为转基因幼胚,再生形成完整植株,该转化途径能有效避免转基因嵌合体植株产生,是较理想的转化受体细胞。因此,本研究建立的秋石斛胚性愈伤再生体系将有利于后续秋石斛转基因分子育种研究。
  • 海南省自然科学基金青年基金项目(322QN359)
  • 中央级公益性科研院所基本科研业务费专项(1630032022002)
  • 海南省重点研发项目(ZDYF2024XDNY239)
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2024年第45卷第6期
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doi: 10.3969/j.issn.1000-2561.2024.06.009
  • 接收时间:2023-06-27
  • 首发时间:2026-06-24
  • 出版时间:2024-06-25
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  • 收稿日期:2023-06-27
  • 修回日期:2023-10-17
基金
海南省自然科学基金青年基金项目(322QN359)
中央级公益性科研院所基本科研业务费专项(1630032022002)
海南省重点研发项目(ZDYF2024XDNY239)
作者信息
    1.海南大学热带农林学院,海南海口 570228
    2.中国热带农业科学院热带作物品种资源研究所/农业农村部华南作物基因资源与种质创制重点实验室/海南省热带作物资源遗传改良与创新重点实验室,海南海口 571101
    3.海南省热带观赏植物种质创新利用工程技术研究中心,海南儋州 571737
    4.中国热带农业科学院三亚研究院,海南三亚 572330
    5.中国热带农业科学院海口实验站,海南海口 571101

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* 尹俊梅(YIN Junmei),E-mail:
李亚梅(LI Yamei),E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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