Jasmonate-mediated gibberellin catabolism constrains growth during herbivore attack in rice

doi:10.1093/plcell/koad191

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	Jasmonate-mediated gibberellin catabolism constrains growth during herbivore attack in rice
	Jin,Gaochen; Qi,Jinfeng; Zu,Hongyue; Liu,Shuting; Gershenzon,Jonathan; Lou,Yonggen; Baldwin,Ian T.; Li,Ran
	2023
发表期刊	PLANT CELL
ISSN	1532-298X
卷号	35 期号:10 页码:3828-3844
摘要	Plant defense against herbivores is costly and often associated with growth repression. The phytohormone jasmonate (JA) plays a central role in prioritizing defense over growth during herbivore attack, but the underlying mechanisms remain unclear. When brown planthoppers (BPH, Nilaparvata lugens) attack rice (Oryza sativa), growth is dramatically suppressed. BPH infestation also increases inactive gibberellin (GA) levels and transcripts of GA 2-oxidase (GA2ox) genes, 2 (GA2ox3 and GA2ox7) of which encode enzymes that catalyze the conversion of bioactive GAs to inactive GAs in vitro and in vivo. Mutation of these GA2oxs diminishes BPH-elicited growth restriction without affecting BPH resistance. Phytohormone profiling and transcriptome analyses revealed that GA2ox-mediated GA catabolism was enhanced by JA signaling. The transcript levels of GA2ox3 and GA2ox7 were significantly attenuated under BPH attack in JA biosynthesis (allene oxide cyclase [aoc]) or signaling-deficient (myc2) mutants. In contrast, GA2ox3 and GA2ox7 expression was increased in MYC2 overexpression lines. MYC2 directly binds to the G-boxes in the promoters of both GA2ox genes to regulate their expression. We conclude that JA signaling simultaneously activates defense responses and GA catabolism to rapidly optimize resource allocation in attacked plants and provides a mechanism for phytohormone crosstalk. Jasmonate-mediated gibberellin catabolism is partially responsible for brown planthopper-elicited growth inhibition in rice.
关键词	DEFENSE MYC2 PLANTS METABOLISM PERCEPTION REPRESSORS RESISTANCE FRAMEWORK PROTEINS TARGETS
DOI	10.1093/plcell/koad191
WOS记录号	WOS:001029883900001
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74899
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Jin,Gaochen,Qi,Jinfeng,Zu,Hongyue,et al. Jasmonate-mediated gibberellin catabolism constrains growth during herbivore attack in rice[J]. PLANT CELL,2023,35(10):3828-3844.
APA	Jin,Gaochen.,Qi,Jinfeng.,Zu,Hongyue.,Liu,Shuting.,Gershenzon,Jonathan.,...&Li,Ran.(2023).Jasmonate-mediated gibberellin catabolism constrains growth during herbivore attack in rice.PLANT CELL,35(10),3828-3844.
MLA	Jin,Gaochen,et al."Jasmonate-mediated gibberellin catabolism constrains growth during herbivore attack in rice".PLANT CELL 35.10(2023):3828-3844.

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