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题名: Silencing Brassinosteroid Receptor BRI1 Impairs Herbivory-elicited Accumulation of Jasmonic Acid-isoleucine and Diterpene Glycosides, but not Jasmonic Acid and Trypsin Proteinase Inhibitors in Nicotiana attenuata
作者: Yang, Da-Hai ; Baldwin, Ian T. ; null(吴建强)
刊名: JOURNAL OF INTEGRATIVE PLANT BIOLOGY
关键词: BRI1 ; herbivore ; insect ; jasmonic acid ; Nicotiana attenuata ; secondary metabolites ; SIGNAL-TRANSDUCTION ; INSECT HERBIVORES ; PLANT-RESPONSES ; ORAL SECRETIONS ; MANDUCA-SEXTA ; BIOSYNTHESIS ; DEFENSE ; RESISTANCE ; PERCEPTION ; KINASE
英文摘要: The brassinosteroid (BR) receptor, BR insensitive 1 (BRI1), plays a critical role in plant development, but whether BRI1-mediated BR signaling is involved in plant defense responses to herbivores was largely unknown. Here, we examined the function of BRI1 in the resistance of Nicotiana attenuata (Solanaceae) to its specialist insect herbivore Manduca sexta. Jasmonic acid (JA) and JA-isoleucine conjugate (JA-Ile) are important hormones that mediate resistance to herbivores and we found that after wounding or simulated herbivory NaBRI1 had little effect on JA levels, but was important for the induction of JA-Ile. Further experiments revealed that decreased JAR (the enzyme for JA-Ile production) activity and availability of Ile in NaBRI1-silenced plants were likely responsible for the low JA-Ile levels. Consistently, M. sexta larvae gained more weight on NaBRI1-silenced plants than on the control plants. Quantification of insect feeding-induced secondary metabolites revealed that silencing NaBRI1 resulted in decreased levels of carbon-rich defensive secondary metabolites (hydroxygeranyllinalool diterpene glycosides, chlorogenic acid, and rutin), but had little effect on the nitrogen-rich ones (nicotine and trypsin proteinase inhibitors). Thus, NaBRI1-mediated BR signaling is likely involved in plant defense responses to M. sexta, including maintaining JA-Ile levels and the accumulation of several carbon-rich defensive secondary metabolites.
出版日期: 2013
卷号: 55, 期号:6, 页码:514-526
语种: 英语
ISSN号: 1672-9072
资助信息: Max Planck Society
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/16609
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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Yang, Da-Hai; Baldwin, Ian T.; Wu, Jianqiang.Silencing Brassinosteroid Receptor BRI1 Impairs Herbivory-elicited Accumulation of Jasmonic Acid-isoleucine and Diterpene Glycosides, but not Jasmonic Acid and Trypsin Proteinase Inhibitors in Nicotiana attenuata,JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2013,55(6):514-526
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