Article(id=1236320604249453329, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236320602324267792, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1000-2561.2023.07.003, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1654531200000, receivedDateStr=2022-06-07, revisedDate=1662480000000, revisedDateStr=2022-09-07, acceptedDate=null, acceptedDateStr=null, onlineDate=1772691401773, onlineDateStr=2026-03-05, pubDate=1690214400000, pubDateStr=2023-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772691401773, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772691401773, creator=13701087609, updateTime=1772691401773, updator=13701087609, issue=Issue{id=1236320602324267792, tenantId=1146029695717560320, journalId=1235980609244409860, year='2023', volume='44', issue='7', pageStart='1307', pageEnd='1524', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772691401319, creator=13701087609, updateTime=1772694620634, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236334105156187098, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236320602324267792, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236334105156187099, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236320602324267792, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1328, endPage=1336, ext={EN=ArticleExt(id=1236320604492722963, articleId=1236320604249453329, tenantId=1146029695717560320, journalId=1235980609244409860, language=EN, title=Screening of Key Metabolites of Areca Flower Fragrance Based on Non-targeted Metabonomics, columnId=1236256430337085821, journalTitle=Chinese Journal of Tropical Crops, columnName=Omics & Biotechnology, runingTitle=null, highlight=null, articleAbstract=

In order to screen out the key metabolites that control the fragrance of areca nut, enhance the fragrance of areca nut, attract more pollinators, and then increase the yield of areca nut. In this study, Headspace Solid Phase Microextraction Gas Chromatography-Mass Spectrometry Combined Analysis Technology was used for non-targeted metabolomic detection of areca nut flowers in different periods. 236 metabolites were detected in the study. 75 differential metabolites were screened by combining VIP value and differential fold. Main metabolites were terpenes, ketones, alcohols. Among them, the volatile compounds of female flowers of Areca accumulated a lot from the female flower unopened stage to the initial blooming stage, and decreased slightly in the full bloom stage, so the initial blooming stage of female flowers of Areca may be the key period for the formation of female flower fragrance. The volatile compounds in the male flowers of Areca accumulated a lot from the initial blooming stage to the blooming stage, so the blooming stage of male flowers may be the key period for the formation of flower fragrance of male flowers of Areca. KEGG database was used to analyze the metabolic pathways of differential metabolites. The fatty acid biosynthesis was the metabolic pathway that was significantly enriched in the female flowers of areca nut and related to flower aroma synthesis, and the substance enriched in this pathway was capric acid. Capric acid is a fatty acid, which is mostly used in plant physiology and signal transmission and other functions. The capric acid content in the female flowers of betel nut increased from the unopened stage to the early flowering stage, and the release of floral fragrance also increased correspondingly. This may be because areca nut starts pollination at the beginning of female flower, and more chemical signals are needed to be transmitted to attract pollinators. So capric acid may be a chemical signal released by betel nut female flowers for pollination. Metabolic pathways significantly enriched in male areca nut flowers and related to flower aroma synthesis are diterpenoid biosynthesis and fatty acid degradation. Palmitaldehyde and (4aR,6aS,9R,11aR,11bR)-4,4,11b-trimethyl-8-methylene tetrahydro-6a and 9-methylcycloheptyl [a] naphthalene were enriched in two pathways. (4aR, 6aS,9R,11aR,11bR)-4,4,11b-trimethyl-8-methylenetetrahydro-6a,9-methylcyclohept[a]naphthalene is a terpenoid. Its enantiomer, ent-kaurene, is synthesized by ring-opening of trans-geranylgeranyl pyrophosphate with the use of kaurine synthase and is a precursor ofgibberellin. The content of this substance was down-regulated from the early flowering period to the full bloom period of male flowers, which may be due to the decrease of the required gibberellin content in male flowers during the full bloom period. Palmitaldehyde is an aldehyde substance, which is a metabolite released by the biodegradation of fatty acids. The release of the fragrance of areca nut male flowers increased from the early blooming stage to the blooming stage, and the content of palmitaldehyde also increased. There is a positive correlation between these two situations. In conclusion, the above three metabolites may be the key metabolites that affect the fragrance of areca nut.

, correspAuthors=Fusun YANG, 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=Xiaodong XIN, Xinyu WEN, Jiajun JIANG, Ling WANG, Guobin YANG, Fusun YANG), CN=ArticleExt(id=1236320605159617303, articleId=1236320604249453329, tenantId=1146029695717560320, journalId=1235980609244409860, language=CN, title=基于非靶向代谢组学的槟榔花香关键代谢物的筛选, columnId=1236256430517440904, journalTitle=热带作物学报, columnName=组学与生物技术, runingTitle=null, highlight=null, articleAbstract=

为了筛选出控制槟榔花香的关键代谢物，提升槟榔花香，吸引更多授粉者，从而提高槟榔产量。本研究采用顶空固相微萃取气相色谱-质谱联合分析技术对不同时期槟榔花进行非靶向代谢组学检测。结果共检测到236种代谢物。利用VIP值和差异倍数相结合的方法共筛选出75种差异代谢物，主要包括萜类、酮类、醇类等。其中槟榔雌花的挥发性化合物从雌花未开期到初开期发生大量积累，在盛开期又发生轻微下降，所以雌花初开期可能是槟榔雌花花香形成的关键时期。槟榔雄花的挥发性化合物在雄花初开期到盛开期发生了大量积累，所以雄花盛开期可能是槟榔雄花花香形成的关键时期。之后对差异代谢物使用KEGG数据库对其代谢途径进行分析，筛选与植物花香有关且富集显著的代谢通路。结果表明：槟榔雌花中富集显著且与花香合成有关的代谢途径为脂肪酸生物合成，在该通路上富集的物质为癸酸。癸酸是一种脂肪酸类物质，其多用于植物生理和信号传递等功能，槟榔雌花未开期到初开期癸酸含量上调，花香释放量也发生相应的提升，这可能是由于槟榔在雌花初开期开始授粉，需要传递更多的化学信号，从而吸引授粉者。所以癸酸可能是槟榔雌花为了授粉而释放的一种化学信号。槟榔雄花中富集显著且与花香合成有关的代谢途径分别为双萜类生物合成和脂肪酸降解，棕榈醛和（4aR,6aS,9R,11aR,11bR）-4,4,11b-三甲基-8-亚甲基十四氢-6a,9-甲基环庚[a]萘分别富集在这2条代谢途径上。（4aR,6aS,9R,11aR,11bR）-4,4,11b-三甲基-8-亚甲基十四氢-6a,9-甲基环庚[a]萘为萜类物质，中文名为贝壳杉烯是双萜类物质，它的对映体ent-贝壳杉烯在贝壳杉烯合酶的作用下由反式-牻牛儿基牻牛儿焦磷酸开环而合成，是赤霉素的前体。雄花初开期到盛开期该物质含量发生下调，可能是由于雄花盛开期时所需赤霉素含量降低。棕榈醛为醛类物质，是脂肪酸生物降解释放出的代谢物，槟榔雄花初开期到盛开期花香释放量升高，同时棕榈醛的含量也发生上调，二者之间呈正相关关系。因此，以上3种代谢物可能是影响槟榔花香的关键代谢物。

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辛晓栋（1997—），男，硕士研究生，研究方向：作物栽培与耕作。

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辛晓栋（1997—），男，硕士研究生，研究方向：作物栽培与耕作。

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