Article(id=1200147842644930941, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1200147837586604797, articleNumber=1001-2494(2024)10-0879-08, orderNo=null, doi=10.11669/cpj.2024.10.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1675008000000, receivedDateStr=2023-01-30, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1764067143355, onlineDateStr=2025-11-25, pubDate=1716307200000, pubDateStr=2024-05-22, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764067143355, onlineIssueDateStr=2025-11-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764067143355, creator=13701087609, updateTime=1764067143355, updator=13701087609, issue=Issue{id=1200147837586604797, tenantId=1146029695717560320, journalId=1190317699101192196, year='2024', volume='59', issue='10', pageStart='857', pageEnd='950', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764067142149, creator=13701087609, updateTime=1764067345188, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200148689244225889, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1200147837586604797, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200148689244225890, tenantId=1146029695717560320, journalId=1190317699101192196, issueId=1200147837586604797, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=879, endPage=886, ext={EN=ArticleExt(id=1200147843072749961, articleId=1200147842644930941, tenantId=1146029695717560320, journalId=1190317699101192196, language=EN, title=Effects of Orthogonal Design Optimized Elicitor Combinations on Fucoxanthin Content and Photosynthetic Physiology and Gene Expression of Phaeodactylum Tricornutum, columnId=null, journalTitle=Chinese Pharmaceutical Journal, columnName=null, runingTitle=null, highlight=null, articleAbstract=

OBJECTIVE To study the effects of different concentrations of photosynthetic induction factor (PIF), methyl jasmonate (MeJA), ceric ammonium sulfate (ACS) and acetylsalicylic acid (ASA) on the accumulation of fucoxanthin in Phaeodactylum tricornutum, screen the best elicitor combination for fucoxanthin accumulation, and study the photosynthetic physiology and gene expression changes of fucoxanthin accumulation in Phaeodactylum tricornutum under the treatment of the best inducer combination. METHODS A four-factor, four-level orthogonal test was used to screen the best inducer combination to promote the accumulation of fucoxanthin in Phaeodactylum tricornutum, and the chlorophyll fluorescence parameters of Phaeodactylum tricornutum under the treatment of the best elicitor combination were detected by pulse-amplitude-modulation (PAM). The expressions of zds, lcyb, rbcL and psbA were detected by RT-qPCR. RESULTS The results of the orthogonal test showed that MeJA was the most significant factor affecting the accumulation of fucoxanthin in Phaeodactylum tricornutum cells, followed by ASA, and the best elicitor combination to promote the accumulation of fucoxanthin in Phaeodactylum tricornutum was 1 μg·L-1 PIF+0.2 mg·L-1 ACS+40 mg·L-1 ASA. The photosynthetic physiological study showed that the inductor treatment was able to increase the fucoxanthin content by 104% compared with the control group, which was 21.77 mg·g-1. The results of photosynthetic physiological study showed that the inducer combination significantly increased the rETRmax value (P<0.05) of Phaeodactylum tricornutum. The expression of rbcL gene was the highest, which was 2.0 times higher than that of the control treatment (P<0.01). CONCLUSION The expressions of rETRmax, chla content, lcyb, rbcL and psbA genes are highly significantly correlated with zds gene, and the photosynthetic efficiency can be improved by promoting the expression of photosynthetic genes and the relative electron transfer rate of PSⅡ, and the expression of genes related to the synthesis of lutein can promote the accumulation of fucoxanthin in Phaeodactylum tricornutum.

, correspAuthors=Yifu GONG, Heyu WANG, 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, authorCompany=null, fund=null, authors=null, authorsList=Xin WU, Yifu GONG, Luqun LI, Xiaowen GAO, Jiao LÜ, Heyu WANG), CN=ArticleExt(id=1200147844452676046, articleId=1200147842644930941, tenantId=1146029695717560320, journalId=1190317699101192196, language=CN, title=正交设计的诱导子组合对三角褐指藻岩藻黄素含量和光合生理及基因表达的影响, columnId=1190352405612040510, journalTitle=中国药学杂志, columnName=论著, runingTitle=null, highlight=null, articleAbstract=

目的 研究光合诱导因子(PIF)、茉莉酸甲酯(MeJA)、硫酸铈铵(ACS)和乙酰水杨酸(ASA)不同浓度组合对三角褐指藻岩藻黄素含量的影响,筛选促进岩藻黄素积累的最佳诱导子组合,并研究最佳诱导子组合处理下岩藻黄素含量积累的光合生理及基因表达变化。方法 采用4因素4水平正交试验法筛选出对三角褐指藻岩藻黄素含量促进效果最佳的诱导子组合,调制叶绿素荧光(PAM)检测最佳诱导子组合处理下三角褐指藻的叶绿素荧光参数,反转录-实时荧光定量聚合酶链反应(RT-qPCR)检测zdslcybrbcLpsbA基因的表达水平。结果 正交试验结果表明,MeJA是影响三角褐指藻藻细胞岩藻黄素积累最显著的因素,其次是ASA。促进三角褐指藻岩藻黄素积累的最佳诱导子组合为1 μg·L-1 PIF+0.2 mg·L-1 ACS+40 mg·L-1 ASA。该诱导子组合处理下三角褐指藻岩藻黄素含量达到21.77 mg·g-1,较对照组提高了104%。光合生理研究结果表明,诱导子组合显著提高了三角褐指藻藻细胞的最大相对电子传递速率(rETRmax)值(P<0.05)。RT-qPCR分析结果表明,诱导子组合促进三角褐指藻岩藻黄素合成相关基因zdslcyb及光合作用PSⅡ碳同化相关基因rbcLpsbA基因的表达,其中,rbcL基因的表达量最高,是对照处理组的2.0倍(P<0.01)。结论 三角褐指藻岩藻黄素含量与zds基因呈显著正相关,与rETRmax、chla含量、lcybrbcLpsbA基因表达量呈极显著正相关,三角褐指藻可通过促进光合作用基因表达和PSⅡ相对电子传递速率来提高光合作用效率、促进岩藻黄素合成相关基因表达来促进岩藻黄素积累。

, correspAuthors=龚一富, 王何瑜, authorNote=null, correspAuthorsNote=
*龚一富,男,博士,教授 研究方向:植物次生代谢产物及机理 Tel:(0574)87600889;
王何瑜,女,硕士,实验师 研究方向:藻类次生代谢调控 Tel:(0574)87600551
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吴欣,女,硕士研究生 研究方向:藻类生物技术

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吴欣,女,硕士研究生 研究方向:藻类生物技术

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PMID: 35794498., articleTitle=Influence of peanut hairy root cultivars on prenylated stilbenoid production and the response mechanism for combining the elicitors of chitosan, methyl jasmonate, and cyclodextrin, refAbstract=null), Reference(id=1200147855005545226, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2021, volume=13, issue=null, pageStart=813, pageEnd=820, url=null, language=null, rfNumber=[27], rfOrder=26, authorNames=WANG Q, JIN W, ZHOU X, journalName=Biomass Convers Biorefin, refType=null, unstructuredReference=WANG Q, JIN W, ZHOU X, et al. Enhancement of biodiesel-promising microalgae Chlorella pyrenoidosa growth using stimulants in municipal sewage[J]. Biomass Convers Biorefin, 2021, 13:813-820. DOI: 10.1007/s13399-020-01204-z., articleTitle=Enhancement of biodiesel-promising microalgae Chlorella pyrenoidosa growth using stimulants in municipal sewage, refAbstract=null), Reference(id=1200147855097819917, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2003, volume=25, issue=3, pageStart=249, pageEnd=256, url=null, language=null, rfNumber=[28], rfOrder=27, authorNames=SUDHA G, RAVISHANKAR G A, journalName=Acta Physiol Plant, refType=null, unstructuredReference=SUDHA G, RAVISHANKAR G A. Elicitation of anthocyanin production in callus cultures of Daucus carota and the involvement of methyl jasmonate and salicylic acid[J]. Acta Physiol Plant, 2003, 25(3):249-256., articleTitle=Elicitation of anthocyanin production in callus cultures of Daucus carota and the involvement of methyl jasmonate and salicylic acid, refAbstract=null), Reference(id=1200147855164928783, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2022, volume=27, issue=9, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[29], rfOrder=28, authorNames=ZHOU J, LIN X, LIU S, journalName=Mol Multidiscip Digit Publ Inst, refType=null, unstructuredReference=ZHOU J, LIN X, LIU S, et al. Effects of compound elicitors on the biosynthesis of triterpenoids and activity of defense enzymes from Inonotus hispidus (Basidiomycetes)[J]. Mol Multidiscip Digit Publ Inst, 2022, 27(9): 2618. DOI: 10.3390/molecules27092618., articleTitle=Effects of compound elicitors on the biosynthesis of triterpenoids and activity of defense enzymes from Inonotus hispidus (Basidiomycetes), refAbstract=null), Reference(id=1200147855227843345, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2017, volume=30, issue=2, pageStart=121, pageEnd=128, url=null, language=null, rfNumber=[30], rfOrder=29, authorNames=SHARMA S, SOHAL B S, journalName=Indian J Agric Biochem, refType=null, unstructuredReference=SHARMA S, SOHAL B S. Insight into the biochemical changes induced in Brassica juncea (var. rlm619) on application of elicitors alone and in combinations[J]. Indian J Agric Biochem, 2017, 30(2):121-128., articleTitle=Insight into the biochemical changes induced in Brassica juncea (var. rlm619) on application of elicitors alone and in combinations, refAbstract=null), Reference(id=1200147855315923732, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2018, volume=41, issue=7, pageStart=1061, pageEnd=1071, url=null, language=null, rfNumber=[31], rfOrder=30, authorNames=WANG H, ZHANG Y, CHEN L, journalName=Bioprocess Biosyst Eng, refType=null, unstructuredReference=WANG H, ZHANG Y, CHEN L, et al. Combined production of fucoxanthin and EPA from two diatom strains Phaeodactylum tricornutum and Cylindrotheca fusiformis cultures[J]. Bioprocess Biosyst Eng, 2018, 41(7):1061-1071., articleTitle=Combined production of fucoxanthin and EPA from two diatom strains Phaeodactylum tricornutum and Cylindrotheca fusiformis cultures, refAbstract=null), Reference(id=1200147855404004118, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2005, volume=82, issue=3, pageStart=222, pageEnd=237, url=null, language=null, rfNumber=[32], rfOrder=31, authorNames=RALPH P J, GADEMANN R, journalName=Aquat Bot, refType=null, unstructuredReference=RALPH P J, GADEMANN R. Rapid light curves: a powerful tool to assess photosynthetic activity[J]. Aquat Bot, 2005, 82(3):222-237., articleTitle=Rapid light curves: a powerful tool to assess photosynthetic activity, refAbstract=null), Reference(id=1200147855563387674, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, doi=null, pmid=null, pmcid=null, year=2001, volume=115, issue=2, pageStart=283, pageEnd=289, url=null, language=null, rfNumber=[33], rfOrder=32, authorNames=CALATAYUD A, BARRENO E, journalName=Environ Pollut, refType=null, unstructuredReference=CALATAYUD A, BARRENO E. Chlorophyll a fluorescence, antioxidant enzymes and lipid peroxidation in tomato in response to ozone and benomyl[J]. Environ Pollut, 2001, 115(2):283-289., articleTitle=Chlorophyll a fluorescence, antioxidant enzymes and lipid peroxidation in tomato in response to ozone and benomyl, refAbstract=null)], funds=[Fund(id=1200147851536855718, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, awardId=2017C510002, language=CN, fundingSource=宁波市社发重大项目资助(2017C510002), fundOrder=null, country=null), Fund(id=1200147851612353194, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, awardId=HX2022000115, language=CN, fundingSource=宁波大学横向项目资助(HX2022000115), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1200147844687557087, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, xref=a, ext=[AuthorCompanyExt(id=1200147844695945697, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, companyId=1200147844687557087, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=a Key Laboratory of Marine Biotechnology of Zhejiang Province, School of Marine Sciences, Ningbo University, Ningbo 315832, China), AuthorCompanyExt(id=1200147844704334306, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, companyId=1200147844687557087, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=a 海洋学院, 浙江省海洋生物工程重点实验室, 宁波大学, 浙江 宁波 315832)]), AuthorCompany(id=1200147844817580523, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, xref=b, ext=[AuthorCompanyExt(id=1200147844825969130, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, companyId=1200147844817580523, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=b College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China), AuthorCompanyExt(id=1200147844834357739, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, companyId=1200147844817580523, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=b 食品与药学学院, 宁波大学, 浙江 宁波 315832)])], figs=[ArticleFig(id=1200147849360011890, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Fig.1, caption=Effects of optimum combination of elicitors on the growth and the pigments content of P. tricornutum. n=3, $\bar{x}±s$

A-growth curve of P. tricornutum; B-pigment content of P. tricornutum, 1)P<0.01, vs the control group.

, figureFileSmall=/V4bLDPfUnOvYmRjCAHnsg==, figureFileBig=1IXUm9C1+i0Hm8YQjLVIsA==, tableContent=null), ArticleFig(id=1200147849460675188, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=图1, caption=诱导子最佳组合对三角褐指藻藻细胞生长和色素含量的影响. n=3, $\bar{x}±s$

A-三角褐指藻生长曲线;B-三角褐指藻色素含量;与对照组相比,1)P<0.01。

, figureFileSmall=/V4bLDPfUnOvYmRjCAHnsg==, figureFileBig=1IXUm9C1+i0Hm8YQjLVIsA==, tableContent=null), ArticleFig(id=1200147849766859385, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Fig.2, caption=Rapid light curves of P. tricornutum. n=3, $\bar{x}±s$, figureFileSmall=q4ZzqJzULkbZJr1W4xcNng==, figureFileBig=eMaS12R82rd19kjsmtBR2w==, tableContent=null), ArticleFig(id=1200147849909465725, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=图2, caption=三角褐指藻的光响应曲线分析. n=3, $\bar{x}±s$, figureFileSmall=q4ZzqJzULkbZJr1W4xcNng==, figureFileBig=eMaS12R82rd19kjsmtBR2w==, tableContent=null), ArticleFig(id=1200147850064654975, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Fig.3, caption=Transcript levels induced by optimum combination of elicitors in P. Tricornutum. n=3, $\bar{x}±s$

1)P<0.01, vs the control group.

, figureFileSmall=z5kqQBs8b6D3blp0shv4Tw==, figureFileBig=arxsgV8qi5efQ8BS6/EGjA==, tableContent=null), ArticleFig(id=1200147850207261314, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=图3, caption=诱导子最佳组合处理下三角褐指藻各基因转录差异. n=3, $\bar{x}±s$

与对照组相比,1)P<0.01。

, figureFileSmall=z5kqQBs8b6D3blp0shv4Tw==, figureFileBig=arxsgV8qi5efQ8BS6/EGjA==, tableContent=null), ArticleFig(id=1200147850328896136, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Tab.1, caption=

Tabular header design table for L16(44) orthogonal test of four inducer treatments of Phaeodactylum tricornutum

, figureFileSmall=null, figureFileBig=null, tableContent=
No. A
PIF/μg·L-1
B
MeJA/μmol·L-1
C
ACS/mg·L-1
D
ASA/mg·L-1
1 0 0 0 0
2 0.1 100 0.1 10
3 1 200 0.2 20
4 10 400 0.4 40
), ArticleFig(id=1200147850446336651, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=表1, caption=

四种诱导子处理三角褐指藻的L16(44)正交试验表头设计表

, figureFileSmall=null, figureFileBig=null, tableContent=
No. A
PIF/μg·L-1
B
MeJA/μmol·L-1
C
ACS/mg·L-1
D
ASA/mg·L-1
1 0 0 0 0
2 0.1 100 0.1 10
3 1 200 0.2 20
4 10 400 0.4 40
), ArticleFig(id=1200147850572165775, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Tab.2, caption=

Orthogonal experimental design and intuitive analysis of four inducers for the treatment of P. tricornutum. n=3, $\bar{x}±s$

, figureFileSmall=null, figureFileBig=null, tableContent=
No. Factors Fucoxanthin content
/mg·g-1
A B C D
1 1 1 1 1 11.03±0.865cd
2 1 2 2 2 13.20±0.323de
3 1 3 3 3 12.97±1.825de
4 1 4 4 4 8.252±1.015b
5 2 1 2 3 10.27±0.694bc
6 2 2 1 4 13.60±0.243e
7 2 3 4 1 9.50±0.360bc
8 2 4 3 2 9.332±1.080bc
9 3 1 3 4 22.16±1.831g
10 3 2 4 3 9.134±1.822bc
11 3 3 1 2 9.163±1.406bc
12 3 4 2 1 8.748±1.503bc
13 4 1 4 2 19.00±0.083f
14 4 2 3 1 5.858±0.545a
15 4 3 2 4 9.099±0.832bc
16 4 4 1 3 10.04±0.784bc
k1 15.03 20.81 14.61 11.71 -
k2 14.23 13.81 13.65 16.78 -
k3 16.40 13.57 16.77 14.13 -
k4 14.66 12.12 15.29 17.70 -
R 2.16 8.69 3.11 5.99 -
), ArticleFig(id=1200147850660246161, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=表2, caption=

4种诱导子处理三角褐指藻的正交实验设计与直观分析. n=3, $\bar{x}±s$

, figureFileSmall=null, figureFileBig=null, tableContent=
No. Factors Fucoxanthin content
/mg·g-1
A B C D
1 1 1 1 1 11.03±0.865cd
2 1 2 2 2 13.20±0.323de
3 1 3 3 3 12.97±1.825de
4 1 4 4 4 8.252±1.015b
5 2 1 2 3 10.27±0.694bc
6 2 2 1 4 13.60±0.243e
7 2 3 4 1 9.50±0.360bc
8 2 4 3 2 9.332±1.080bc
9 3 1 3 4 22.16±1.831g
10 3 2 4 3 9.134±1.822bc
11 3 3 1 2 9.163±1.406bc
12 3 4 2 1 8.748±1.503bc
13 4 1 4 2 19.00±0.083f
14 4 2 3 1 5.858±0.545a
15 4 3 2 4 9.099±0.832bc
16 4 4 1 3 10.04±0.784bc
k1 15.03 20.81 14.61 11.71 -
k2 14.23 13.81 13.65 16.78 -
k3 16.40 13.57 16.77 14.13 -
k4 14.66 12.12 15.29 17.70 -
R 2.16 8.69 3.11 5.99 -
), ArticleFig(id=1200147850769298069, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Tab.3, caption=

Analysis of variance (ANOVA) of the results of an orthogonal test of four inducers for the treatment of P. tricornutum

, figureFileSmall=null, figureFileBig=null, tableContent=
Source of
variation
Squar
sum
Degrees
of freedom
Mean
square
F P Significance
Pif(A) 17.781 3 5.927 0.685 0.567 -
MeJA(B) 307.111 3 102.370 11.837 0.000 1)
ACS(C) 34.750 3 11.583 1.339 0.277 -
ASA(D) 148.569 3 49.523 5.726 0.003 1)
Error 302.689 35 8.648
), ArticleFig(id=1200147850878349974, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=表3, caption=

4种诱导子处理三角褐指藻的正交实验结果方差分析

, figureFileSmall=null, figureFileBig=null, tableContent=
Source of
variation
Squar
sum
Degrees
of freedom
Mean
square
F P Significance
Pif(A) 17.781 3 5.927 0.685 0.567 -
MeJA(B) 307.111 3 102.370 11.837 0.000 1)
ACS(C) 34.750 3 11.583 1.339 0.277 -
ASA(D) 148.569 3 49.523 5.726 0.003 1)
Error 302.689 35 8.648
), ArticleFig(id=1200147850953847450, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Tab.4, caption=

Effects of optimum combination of elicitors on chlorophyll fluorescence parameter expression in P. tricornutum. n=3, $\bar{x}±s$

, figureFileSmall=null, figureFileBig=null, tableContent=
Group Fv/Fm NPQ QP Y(Ⅱ) rETRmax α
Control group 0.645±0.010 0.073±0.006 0.923±0.306 0.520±0.361 55.132±0.839 0.311±0.005
Experimental group 0.642±0.008 0.087±0.208 0.970±0.000 0.573±0.116 58.386±0.1991) 0.289±0.138
), ArticleFig(id=1200147851092259483, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=表4, caption=

最佳诱导子组合对三角褐指藻各叶绿素荧光参数的影响. n=3, $\bar{x}±s$

, figureFileSmall=null, figureFileBig=null, tableContent=
Group Fv/Fm NPQ QP Y(Ⅱ) rETRmax α
Control group 0.645±0.010 0.073±0.006 0.923±0.306 0.520±0.361 55.132±0.839 0.311±0.005
Experimental group 0.642±0.008 0.087±0.208 0.970±0.000 0.573±0.116 58.386±0.1991) 0.289±0.138
), ArticleFig(id=1200147851205505695, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=EN, label=Tab.5, caption=

Correlation analysis of fucoxanthin content with chlorophyll fluorescence parameters and expression of related genes in P. tricornutum

, figureFileSmall=null, figureFileBig=null, tableContent=
Related parameters Fucoxanthin content chla zds lcyb rbcL psbA Fv/Fm NPQ QP Y(Ⅱ) rETRmax α
Fucoxanthin 1
Chla 0.9982) 1
zds 0.8831) 0.8581) 1
lcyb 0.9672) 0.9522) 0.9732) 1
rbcL 0.794 0.769 0.9382) 0.8892) 1
psbA 0.9192) 0.8961) 0.9202) 0.9502) 0.8511) 1
Fv/Fm -0.153 -0.108 -0.514 -0.344 -0.704 -0.413 1
NPQ 0.123 -0.031 0.772 0.783 0.772 0.679 -0.8331) 1
QP 0.757 0.761 0.789 0.791 0.8251) 0.804 -0.490 0.557 1
Y(Ⅱ) 0.752 0.749 0.692 0.730 0.8451) 0.750 -0.521 0.318 0.8151) 1
rETRmax 0.9692) 0.9662) 0.8421) 0.9342) 0.673 0.8701) 0.006 0.463 0.633 0.567 1
α -0.657 -0.771 -0.771 -0.725 -0.657 -0.714 0.143 -0.216 -0.8801) -0.647 -0.657 1
), ArticleFig(id=1200147851419415203, tenantId=1146029695717560320, journalId=1190317699101192196, articleId=1200147842644930941, language=CN, label=表5, caption=

三角褐指藻岩藻黄素含量与叶绿素荧光参数及相关基因的相关性分析

, figureFileSmall=null, figureFileBig=null, tableContent=
Related parameters Fucoxanthin content chla zds lcyb rbcL psbA Fv/Fm NPQ QP Y(Ⅱ) rETRmax α
Fucoxanthin 1
Chla 0.9982) 1
zds 0.8831) 0.8581) 1
lcyb 0.9672) 0.9522) 0.9732) 1
rbcL 0.794 0.769 0.9382) 0.8892) 1
psbA 0.9192) 0.8961) 0.9202) 0.9502) 0.8511) 1
Fv/Fm -0.153 -0.108 -0.514 -0.344 -0.704 -0.413 1
NPQ 0.123 -0.031 0.772 0.783 0.772 0.679 -0.8331) 1
QP 0.757 0.761 0.789 0.791 0.8251) 0.804 -0.490 0.557 1
Y(Ⅱ) 0.752 0.749 0.692 0.730 0.8451) 0.750 -0.521 0.318 0.8151) 1
rETRmax 0.9692) 0.9662) 0.8421) 0.9342) 0.673 0.8701) 0.006 0.463 0.633 0.567 1
α -0.657 -0.771 -0.771 -0.725 -0.657 -0.714 0.143 -0.216 -0.8801) -0.647 -0.657 1
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正交设计的诱导子组合对三角褐指藻岩藻黄素含量和光合生理及基因表达的影响
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吴欣 a , 龚一富 a, * , 郦露群 a , 高小雯 a , 吕娇 a , 王何瑜 b, *
中国药学杂志 | 论著 2024,59(10): 879-886
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中国药学杂志 | 论著 2024, 59(10): 879-886
正交设计的诱导子组合对三角褐指藻岩藻黄素含量和光合生理及基因表达的影响
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吴欣a, 龚一富a, *, 郦露群a, 高小雯a, 吕娇a, 王何瑜b, *
作者信息
  • a 海洋学院, 浙江省海洋生物工程重点实验室, 宁波大学, 浙江 宁波 315832
  • b 食品与药学学院, 宁波大学, 浙江 宁波 315832
  • 吴欣,女,硕士研究生 研究方向:藻类生物技术

通讯作者:

*龚一富,男,博士,教授 研究方向:植物次生代谢产物及机理 Tel:(0574)87600889;
王何瑜,女,硕士,实验师 研究方向:藻类次生代谢调控 Tel:(0574)87600551
Effects of Orthogonal Design Optimized Elicitor Combinations on Fucoxanthin Content and Photosynthetic Physiology and Gene Expression of Phaeodactylum Tricornutum
Xin WUa, Yifu GONGa, *, Luqun LIa, Xiaowen GAOa, Jiao LÜa, Heyu WANGb, *
Affiliations
  • a Key Laboratory of Marine Biotechnology of Zhejiang Province, School of Marine Sciences, Ningbo University, Ningbo 315832, China
  • b College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China
出版时间: 2024-05-22 doi: 10.11669/cpj.2024.10.004
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目的 研究光合诱导因子(PIF)、茉莉酸甲酯(MeJA)、硫酸铈铵(ACS)和乙酰水杨酸(ASA)不同浓度组合对三角褐指藻岩藻黄素含量的影响,筛选促进岩藻黄素积累的最佳诱导子组合,并研究最佳诱导子组合处理下岩藻黄素含量积累的光合生理及基因表达变化。方法 采用4因素4水平正交试验法筛选出对三角褐指藻岩藻黄素含量促进效果最佳的诱导子组合,调制叶绿素荧光(PAM)检测最佳诱导子组合处理下三角褐指藻的叶绿素荧光参数,反转录-实时荧光定量聚合酶链反应(RT-qPCR)检测zdslcybrbcLpsbA基因的表达水平。结果 正交试验结果表明,MeJA是影响三角褐指藻藻细胞岩藻黄素积累最显著的因素,其次是ASA。促进三角褐指藻岩藻黄素积累的最佳诱导子组合为1 μg·L-1 PIF+0.2 mg·L-1 ACS+40 mg·L-1 ASA。该诱导子组合处理下三角褐指藻岩藻黄素含量达到21.77 mg·g-1,较对照组提高了104%。光合生理研究结果表明,诱导子组合显著提高了三角褐指藻藻细胞的最大相对电子传递速率(rETRmax)值(P<0.05)。RT-qPCR分析结果表明,诱导子组合促进三角褐指藻岩藻黄素合成相关基因zdslcyb及光合作用PSⅡ碳同化相关基因rbcLpsbA基因的表达,其中,rbcL基因的表达量最高,是对照处理组的2.0倍(P<0.01)。结论 三角褐指藻岩藻黄素含量与zds基因呈显著正相关,与rETRmax、chla含量、lcybrbcLpsbA基因表达量呈极显著正相关,三角褐指藻可通过促进光合作用基因表达和PSⅡ相对电子传递速率来提高光合作用效率、促进岩藻黄素合成相关基因表达来促进岩藻黄素积累。

三角褐指藻  /  岩藻黄素  /  正交试验  /  光合生理指标  /  基因表达

OBJECTIVE To study the effects of different concentrations of photosynthetic induction factor (PIF), methyl jasmonate (MeJA), ceric ammonium sulfate (ACS) and acetylsalicylic acid (ASA) on the accumulation of fucoxanthin in Phaeodactylum tricornutum, screen the best elicitor combination for fucoxanthin accumulation, and study the photosynthetic physiology and gene expression changes of fucoxanthin accumulation in Phaeodactylum tricornutum under the treatment of the best inducer combination. METHODS A four-factor, four-level orthogonal test was used to screen the best inducer combination to promote the accumulation of fucoxanthin in Phaeodactylum tricornutum, and the chlorophyll fluorescence parameters of Phaeodactylum tricornutum under the treatment of the best elicitor combination were detected by pulse-amplitude-modulation (PAM). The expressions of zds, lcyb, rbcL and psbA were detected by RT-qPCR. RESULTS The results of the orthogonal test showed that MeJA was the most significant factor affecting the accumulation of fucoxanthin in Phaeodactylum tricornutum cells, followed by ASA, and the best elicitor combination to promote the accumulation of fucoxanthin in Phaeodactylum tricornutum was 1 μg·L-1 PIF+0.2 mg·L-1 ACS+40 mg·L-1 ASA. The photosynthetic physiological study showed that the inductor treatment was able to increase the fucoxanthin content by 104% compared with the control group, which was 21.77 mg·g-1. The results of photosynthetic physiological study showed that the inducer combination significantly increased the rETRmax value (P<0.05) of Phaeodactylum tricornutum. The expression of rbcL gene was the highest, which was 2.0 times higher than that of the control treatment (P<0.01). CONCLUSION The expressions of rETRmax, chla content, lcyb, rbcL and psbA genes are highly significantly correlated with zds gene, and the photosynthetic efficiency can be improved by promoting the expression of photosynthetic genes and the relative electron transfer rate of PSⅡ, and the expression of genes related to the synthesis of lutein can promote the accumulation of fucoxanthin in Phaeodactylum tricornutum.

Phaeodactylum tricornutum  /  fucoxanthin  /  orthogonal experiment  /  photosynthetic physiological index  /  gene expression
吴欣, 龚一富, 郦露群, 高小雯, 吕娇, 王何瑜. 正交设计的诱导子组合对三角褐指藻岩藻黄素含量和光合生理及基因表达的影响. 中国药学杂志, 2024 , 59 (10) : 879 -886 . DOI: 10.11669/cpj.2024.10.004
Xin WU, Yifu GONG, Luqun LI, Xiaowen GAO, Jiao LÜ, Heyu WANG. Effects of Orthogonal Design Optimized Elicitor Combinations on Fucoxanthin Content and Photosynthetic Physiology and Gene Expression of Phaeodactylum Tricornutum[J]. Chinese Pharmaceutical Journal, 2024 , 59 (10) : 879 -886 . DOI: 10.11669/cpj.2024.10.004
三角褐指藻(Phaeodactylum tricornutum)隶属于褐指藻属,是一类具有较高经济价值的模式硅藻,易于培养,可以在多种培养基中生长。同时由于其生化特性[1],对于高pH值具有耐受性[2],且在低光照下也能生长[3],在室外大规模培养中的优越性已显著超越其他微藻。三角褐指藻中能产生一种天然的次生代谢产物——岩藻黄素(fucoxanthin),岩藻黄素是叶黄素类胡萝卜素,有许多药理作用,如抗癌[4-5]、抗炎[6]、抗肥胖[7]等,是一种具有开发应用价值的海洋药物。随着对岩藻黄素的开发和利用不断取得进展,近年生物制药市场对于岩藻黄素的需求也在提升,但由于三角褐指藻中的岩藻黄素含量较低,因此基于岩藻黄素的药物生产成本普遍较高,那么如何以低成本的方式提高三角褐指藻岩藻黄素含量成为工业化生产岩藻黄素药物的最大挑战。
目前提高植物中药物含量的方法主要有通过转基因技术获得过表达药物合成关键基因的植株[8-9]、诱变育种获得高产药物的突变株[10]、优化培养条件或添加外源诱导子来促进药物的积累等[11-12]。相较而言添加外源诱导子成本较低且耗时短,比较适用于工业化生产,因此本研究选用4种诱导子来处理三角褐指藻以提高岩藻黄素的含量,而岩藻黄素的积累与诱导子种类及浓度有关。有研究表明,10 μmol·L-1乙酰水杨酸(acetylsalicylic acid,ASA)、50~100 μmol·L-1茉莉酸甲酯(methyl jasmonate,MeJA)、0.1 mg·L-1花生四烯酸(arachidonic acid,AA)和0.4 mg·L-1硫酸铈铵(ammonium cerous sulfate,ACS)均显著促进三角褐指藻岩藻黄素含量[13-16]。Zhu等[17]用0.2 mg·L-1ACS处理三角褐指藻使岩藻黄素含量较对照组上升60%。Li等[18]用1 μg·L-1的光合作用促进剂(photosynthetic induction factor,PIF)处理三角褐指藻使岩藻黄素含量提高1.44倍。之前的研究均采用单因素研究诱导子对三角褐指藻岩藻黄素含量的影响,而不同诱导子组合是否能更进一步提高三角褐指藻岩藻黄素含量还未见相关报道。正交实验设计是一种能够处理多因素实验并筛选出最佳组合的有效方法。通过正交实验可以用最少的实验次数,从多种因素中筛选影响岩藻黄素含量的最优组合。本研究采用4因素4水平,使用正交设计筛选促进三角褐指藻岩藻黄素含量的最佳诱导子组合,为三角褐指藻岩藻黄素的规模化生产提供基础。
岩藻黄素的合成与光合生理和基因表达相关,PIF处理可通过提高三角褐指藻光合作用效率和相关基因表达来促进岩藻黄素的积累,岩藻黄素含量与PSⅡ实际光合产量呈极显著正相关,且与基因表达也有很强的相关性,其中lcyb与岩藻黄素含量相关性最高[18]。MeJA、ASA和ACS可通过调控三角褐指藻的岩藻黄素合成相关基因的表达来促进三角褐指藻岩藻黄素的积累[12-13,15]。本论文优化的诱导子组合是否对三角褐指藻光合生理、光合作用相关基因和岩藻黄素合成相关基因的表达有影响值得进一步研究,本研究为深入阐明岩藻黄素合成的生理生化和分子调控机理提供基础。
三角褐指藻藻种由宁波大学海洋学院藻类生物工程重点实验室提供。以1∶10的比例将藻细胞接种于改良版的f/2液体培养基中。所有藻均在光强为60 μmol·m-2·s-1、温度为(20±1)℃、光暗比为12 h∶12 h的条件下培养,每天随机调换三角瓶的位置并定时充分摇动3次。
以PIF、MeJA、ACS和ASA四种外源诱导子为考察因素,选择L16(44)正交表,设计了4因素4水平正交实验,表头设计见表1。正交表和16种组合处理及四因素的详细配比见表2。按照表2的试验条件,当三角瓶中的三角褐指藻生长至指数生长期时,即当藻液680 nm波长处的光密度(optical density at 680 nm,OD680)达到0.2时,加入不同因素配比的诱导子进行处理,每个处理至少3个重复。
将生长至指数期的三角褐指藻用培养基按比例稀释,在流式细胞仪的检测下计算藻细胞数量,再用紫外分光光度计测定相应的OD680值,绘制OD与藻细胞密度的标准曲线。开始处理后每24 h测定藻液的OD680值,根据标准曲线计算相应的细胞密度(公式1)。
y=8.697 2x+0.120 4
式中y为细胞密度(1.0×106·mL-1),x为680 nm处的光密度值;r为相关系数,r2=0.999 1。
采用有机溶剂提取法[19],收集90 mL指数生长末期的三角褐指藻藻液,在4 ℃下以5 000 r·min-1的转速离心10 min,弃上清,藻泥在-80 ℃超低温冰箱中冷冻2 d后用冷冻干燥机干燥48 h,按照1 g∶40 mL的比例加入无水乙醇,并用冷冻研磨仪充分研磨破碎藻细胞,破碎后浸提2次。浸提液以5 000 r·min-1的转速离心10 min,收集上清,利用紫外分光光度计测定445 nm处的光密度值(OD445)[20]。按公式2计算岩藻黄素含量。
岩藻黄素含量(mg·g-1)=1 000×OD445×N×V/(OD'×M×100)
式中:OD445表示上清液在445 nm处的光密度;N为稀释倍数;V为粗提液的体积;OD'为1%的岩藻黄素标准品在1 cm光程长的比色皿中的理论吸收值,即1 600;M为样品干质量。
取三角褐指藻藻液10 mL,在4 ℃条件下以4 000 r·min-1的转速离心10 min,弃上清,双蒸水冲洗藻泥2次,加入体积分数90%丙酮溶液,4 ℃黑暗处理24 h后,再次以5 000 r·min-1的转速离心10 min,收集上清液,利用紫外分光光度计测定上清液在OD664、OD630、OD647和OD750处的光密度值[21-22]。根据公式3计算叶绿素a含量:
叶绿素a含量(mg·g-1)=[11.85(OD664-OD750)-1.54(OD647-OD750)-0.08(OD630-OD750)]×V/(M×L)
式中:V为样品提取液体积(mL);M为样品质量(g);L为比色皿光程(cm)。
使用AquaPen手持式藻类荧光测量仪FAQ测定各荧光参数。取样后将待测藻液置于黑暗中15 min,并在避光条件下倒入测量杯中。根据藻体密度将系统实时荧光值(Ft值)调至5 000以下,光化学光设置为600 μmol·m-2·s-1以获得PSⅡ最大光化学效率(Fv/Fm)、PSⅡ实际光化学效率[Y(Ⅱ)]、光化学淬灭系数(photochemistry quenching,QP)、非光化学淬灭系数(non-photochemistry quenching,NPQ)。再次取待测藻液暗适应5~10 s后进行快速光响应曲线(RLC)的测定,RLC用公式4进行拟合,进一步计算PSⅡ最大相对电子传递速率(rETRmax)及表观光能利用效率(α)[23]
rETR=PAR/(a×PAR2+b×PAR+c)
PAR为光的光合有效辐射,a、b、c均为软件origin拟合曲线计算出来的。
取100 mL三角褐指藻藻液,收集藻泥,根据使用制造商提供的说明书,使用RNA提取试剂盒(plant RNA Kit,OMEGA)提取三角褐指藻总RNA,使用 HiScript Ⅱ Q RT SuperMix for qPCR(南京诺维赞)试剂盒反转录总RNA得到cDNA。根据美国国立生物技术信息中心(National Center for Biotechnology Information,NCBI)数据库中已知的三角褐指藻岩藻黄素合成相关基因及光合作用相关基因的核心序列,选择ζ-胡萝卜脱氢酶基因(zds)、番茄红素β-环化酶基因(lcyb)、光系统Ⅱ蛋白D1基因(psbA)、核酮糖-1,5-二磷酸羧化酶大亚基基因(rbcL),用Oligo7设计特定引物[24],上海生工生物工程公司合成,β-actin基因作为管家基因。反转录-实时荧光定量聚合酶链反应(RT-qPCR)反应程序如下:95 ℃预变性3 min,40轮扩增循环(95 ℃变性30 s,55℃退火30 s,72 ℃延伸20 s),72 ℃延伸10 min,16 ℃保存。运用2-ΔΔCt法处理RT-qPCR的数据。
IBM SPSS26软件对岩藻黄素含量与光合生理指标进行相关性分析,其中符合正态分布的数据选择Pearson相关性分析,不符合正态分布的数据选择Spearman相关性分析,显著性分析采用最小显著差异法(least significant difference,LSD),正交实验设计数据进行方差分析以及直观分析,P<0.05为显著差异,P<0.01为极显著差异,使用Graphpad Prism 9作图。所有实验独立重复3次,数据记录为平均值和标准偏差(SD)。
采用4因素4水平正交实验研究不同外源诱导子组合对三角褐指藻岩藻黄素含量的影响,结果表明(表2~3),在不同的诱导子组合下,培养至平台期的三角褐指藻岩藻黄素含量范围为5.858~22.16 mg·g-1。直观分析和方差分析结果表明,MeJA和ASA对三角褐指藻岩藻黄素含量有极显著差异,但MeJA抑制岩藻黄素的积累,而ASA促进岩藻黄素的积累。根据F值大小确定4种诱导子对岩藻黄素含量积累影响的主次因素,结果表明,影响三角褐指藻岩藻黄素含量积累的主次关系为B>D>C>A,即参试的4个诱导子中MeJA的影响最大,其次是ASA,然后是ACS和PIF。根据各因素水平均值得出促进三角褐指藻岩藻黄素含量增加的最佳诱导子组合为A3B1C3D4,即最优诱导子组合为1 μg·L-1 PIF+0.2 mg·L-1 ACS+40 mg·L-1 ASA。该组合与正交试验表中第9号培养基组合相同,在该诱导子组合下,三角褐指藻岩藻黄素含量最高,达到22.16 mg·g-1
研究最优诱导子组合对三角褐指藻藻细胞生长的影响,结果表明,三角褐指藻在接种的第2天至第9天生长迅速,藻细胞密度逐渐增加并在第12天达到最大值(图1)。最优诱导子组合下培养的藻类细胞生长低于对照组,在第9天时,诱导子组合组三角褐指藻细胞生长量为8.789×106 cells·mL-1,是对照组的0.8倍,说明最优诱导子组合抑制三角褐指藻藻细胞的生长。
研究最优诱导子组合对三角褐指藻岩藻黄素和叶绿素a含量的影响(图1),结果表明,与对照组相比,诱导子组合能显著促进三角褐指藻岩藻黄素的积累,对照组的岩藻黄素含量为10.67 mg·g-1时,诱导子组合组处理的三角褐指藻岩藻黄素含量达到21.77 mg·g-1,比对照组提高了104%。诱导子组合组处理三角褐指藻,其叶绿素a含量的变化趋势与岩藻黄素一致,叶绿素a含量为对照组的2.03倍,说明诱导子在促进岩藻黄素含量的同时也促进了三角褐指藻叶绿素a的积累。
研究最优诱导子组合对三角褐指藻叶绿素荧光参数的影响,结果表明(表4),诱导子组合组的三角褐指藻Fv/Fm并未发生明显变化,NPQ、Y(Ⅱ)、QP、α值有小幅度的增加,但不显著。而rETRmax显著高于对照组。光相应曲线结果表明(图2),实验组和对照组的三角褐指藻RLC在0~300 μmol·m-2·s-1之间随着光化光强度的增加,三角褐指藻rETR快速上升,在500 μmol·m-2·s-1后达到相对稳定的状态,且实验组组的整体相对电子传递速率要高于对照组。
研究诱导子组合对三角褐指藻岩藻黄素合成及光合作用相关基因表达的影响,结果表明(图3),实验组的岩藻黄素合成相关基因zdslcyb以及光合作用相关基因rbclpsbA的表达量较对照组极显著上调(P<0.01)。其中rbcl基因的表达量最高,为对照组的2.0倍,说明诱导子促进岩藻黄素合成与岩藻黄素合成途径以及光合作用相关通路基因的表达有关。
岩藻黄素含量与zdslcybrbcLpsbA基因表达水平、叶绿素荧光参数及叶绿素a含量的相关性分析结果表明(表5),岩藻黄素含量与叶绿素含量、lcyb基因、psbA基因、rETRmax呈极显著正相关(P<0.01),与zds基因、rbcl基因均呈显著正相关(P<0.05)。其中,与岩藻黄素含量相关性最高的基因为lcyb(r=0.967,P=0.002),相关性最高的叶绿素荧光参数为rETRmax(r=0.969,P=0.001)。Fv/Fm、NPQ、QP、Y(Ⅱ)及α与岩藻黄素含量则无显著相关性。
三角褐指藻是优质的海洋经济微藻,可以积累岩藻黄素,并具有生长速度快、可从废弃资源如废水中回收养分等优点,从而提供更高的工周转率和经济可行的加工替代品,那么如何低成本高效率地提高其岩藻黄素的含量是现在的重要问题。而诱导子可以引起藻类快速、高度特异且有选择性的方式诱导特定基因的表达,从而激活次级代谢的目标途径,提高次生代谢产物的产量[25],基于此,本研究选用了价格低廉的PIF、MeJA、ACS、ASA作为诱导子来促进三角褐指藻岩藻黄素的含量。
相较于单一的诱导子,利用不同诱导子之间的协同作用组合处理植物往往可以使得其次生代谢产物的含量得到更大的提升[26]。Wang等[27]发现2,4-D+Fe3++光合细菌+CO2的添加剂组合可以促进小球藻生长和脂质的积累。MeJA 与其他激素相互作用调节植物次生代谢产物的合成,在胡萝卜中SA与MeJA组合可显著促进花青素的合成[28]。油酸与MeJA联合使用对粗毛纤孔菌三萜产量有协同作用,可有效促进粗毛纤孔菌的三萜富集[29]。苯并噻二唑(benzothiadiazole,BTH)与SA组合促进发芽种子酚类物质、类胡萝卜素含量积累方面比单独使用BTH更加有效[30]。这些研究均表明诱导子组合影响次生代谢产物积累是可行且有效的。本研究结果也表明,单独使用MeJA不利于三角褐指藻岩藻黄素的合成,而PIF、ASA、ACS组合可显著促进三角褐指藻岩藻黄素的合成与积累。
光合作用是藻类最基本的生理生化活动,光合作用的效率直接影响着藻类的生长速度和次生代谢产物的合成速率。Fv/Fm表示光化学系统的最大光化学量子产率,可以反映藻类光学系统反应中心捕获激发能量的效率[28],一般来说只有当藻细胞受到环境因素的胁迫时才会发生显著变化,而在本研究中诱导子组合组的Fv/Fm较对照组并无区别,说明诱导子组合不会改变三角褐指藻的最大光合潜力,同时也不会对其光合系统造成严重损害。QP是PSⅡ吸收的能量用于光化学反应的比例,反映了光合活性的高低,诱导子组合组的QP略高于对照组,诱导子的处理使得三角褐指藻对高光敏感度下降,在光源不那么充足的情况下也可以保证一定的光合效率。rETR代表PSⅡ系统中的电子相对传递速率,反映了光合细胞器的光利用率[29],而Y(Ⅱ)是PSⅡ实际光能转换效率,可以反映实时能量的捕获效率,本研究表明rETRmax与岩藻黄素含量(r=0.969,P=0.001)、叶绿素a含量(r=0.966,P=0.002)成正相关,结合诱导子组合组的QP值的增加,可能是促进了藻细胞的卡尔文循环,提高了二氧化碳同化率,诱导PSⅡ反应中心的开放,从而提高电子从PSⅠ传递到PSⅡ再到其他系统的电子传输速率[30]。同时,rbcL基因与叶绿素荧光中的QP和Y(Ⅱ)呈显著正相关,进一步说明三角褐指藻可以通过提高藻细胞的光合作用效率达到促进岩藻黄素积累的目的。
植物的光合作用与核酮糖1,5-二磷酸羧化酶(ribulose-1,5-bishosphate carboxylase/oxygenase, Rubisco)大亚基基因rbcL和PSⅡ反应中心蛋白D1基因psbA密切相关。RbcL基因反应二氧化碳的固定效率从而决定植物的光合效率[31-32],psbA基因可以在一定程度上反映植物固碳两个过程的初始反应与状态,从而间接反映光合途径上下游的基因表达状态[33]。本研究结果表明,诱导子组合显著促进了rbcLpsbA基因的表达,岩藻黄素含量与psbA基因(r=0.919,P=0.010)呈显著正相关,与rbcL基因呈中等正相关(r=0.794,P=0.059),说明三角褐指藻岩藻黄素积累与光合作用相关基因表达相关。岩藻黄素属于光合作用的次生代谢产物,参与光合作用的PSⅡ,诱导子组合处理使藻细胞生长速度低于对照组,给藻细胞造成了非生物胁迫,藻内环境自我调节适应外界胁迫,加速电子传递链的速度,从而提高了光合作用效率,增加岩藻黄素的积累。Wei等[24]在用雷帕霉素处理三角褐指藻时发现rbcSpsbArbcL基因对岩藻黄素合成额贡献率最高,达到了91.9%,这与本研究结果一致, 说明,psbArbcL基因的表达是影响三角褐指藻岩藻黄素合成的重要因子。岩藻黄素的合成除了与光合作用相关基因表达有关以外,还与岩藻黄素生物合成途径相关基因表达有关。本研究表明,诱导子组合可促进岩藻黄素合成途径中zdslcyb基因的表达(P<0.05),且基因表达与岩藻黄素含量变化趋势一致,说明zdslcyb基因也是调控岩藻黄素合成的关键基因。诱导子组合提高岩藻黄素积累的原因是因为诱导子组合通过调控合成相关基因及光合作用相关基因的表达,促进相对电子传递速率,提高二氧化碳同化率,提高藻细胞光合作用效率,从而促进岩藻黄素的合成与积累。但本研究仅仅是对诱导子在特定光照、温度及接种密度下对三角褐指藻岩藻黄素含量影响的初步探讨,在实际的大规模培养中,还可以考虑最适合的接种密度以及环境因素的影响,以达到积累更多岩藻黄素的目的。
  • 宁波市社发重大项目资助(2017C510002)
  • 宁波大学横向项目资助(HX2022000115)
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2024年第59卷第10期
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doi: 10.11669/cpj.2024.10.004
  • 接收时间:2023-01-30
  • 首发时间:2025-11-25
  • 出版时间:2024-05-22
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  • 收稿日期:2023-01-30
基金
宁波市社发重大项目资助(2017C510002)
宁波大学横向项目资助(HX2022000115)
作者信息
    a 海洋学院, 浙江省海洋生物工程重点实验室, 宁波大学, 浙江 宁波 315832
    b 食品与药学学院, 宁波大学, 浙江 宁波 315832

通讯作者:

*龚一富,男,博士,教授 研究方向:植物次生代谢产物及机理 Tel:(0574)87600889;
王何瑜,女,硕士,实验师 研究方向:藻类次生代谢调控 Tel:(0574)87600551
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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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