High levels of jasmonic acid antagonize the biosynthesis of gibberellins and inhibit the growth of Nicotiana attenuata stems

	High levels of jasmonic acid antagonize the biosynthesis of gibberellins and inhibit the growth of Nicotiana attenuata stems
	Heinrich, Maria ; Hettenhausen, Christian ; Lange, Theo ; Wuensche, Hendrik ; Fang, Jingjing ; Baldwin, Ian T. ; Wu, Jianqiang
通讯作者	Wu, JQ (reprint author), Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Lanhei Rd 132, Kunming 650201, Peoples R China. ; jwu@ice.mpg.de
	2013
发表期刊	PLANT JOURNAL
ISSN	0960-7412
卷号	73 期号:4 页码:591-606
摘要	Hormones play pivotal roles in regulating plant development, growth, and stress responses, and cross-talk among different hormones fine-tunes various aspects of plant physiology. Jasmonic acid (JA) is important for plant defense against herbivores and necrotic fungi and also regulates flower development; in addition, Arabidopsis mutants over-producing JA usually have stunted stems and wound-induced jasmonates suppress Arabidopsis growth, suggesting that JA is also involved in stem elongation. Gibberellins (GAs) promote stem and leaf growth and modulate seed germination, flowering time, and the development of flowers, fruits, and seeds. However, little is known about the interaction between the JA and GA pathways. Two calcium-dependent protein kinases, CDPK4 and CDPK5, are important suppressors of JA accumulation in a wild tobacco species, Nicotiana attenuata. The stems of N.attenuata silenced in CDPK4 and CDPK5 (irCDPK4/5 plants) had dramatically increased levels of JA and exhibited stunted elongation and had very high contents of secondary metabolites. Genetic analysis indicated that the high JA levels in irCDPK4/5 stems accounted for the suppressed stem elongation and the accumulation of secondary metabolites. Supplementation of GA3 to irCDPK4/5 plants largely restored normal stem growth to wild-type levels. Measures of GA levels indicated that over-accumulation of JA in irCDPK4/5 stems inhibited the biosynthesis of GAs. Finally, we show that JA antagonizes GA biosynthesis by strongly inhibiting the transcript accumulation of GA20ox and possibly GA13ox, the key genes in GA production, demonstrating that high JA levels antagonize GA biosynthesis in stems.
关键词	Jasmonic Acid Gibberellin Phytohormone Interaction Stem Elongation Gibberellin Biosynthesis Nicotiana Attenuata Trypsin Proteinase-inhibitors Plant-growth Cross-talk Molecular-mechanism Insect Herbivores Gene-expression Arabidopsis Responses Defense Accumulation
学科领域	Plant Sciences
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/16601
专题	资源植物与生物技术所级重点实验室
推荐引用方式 GB/T 7714	Heinrich, Maria,Hettenhausen, Christian,Lange, Theo,et al. High levels of jasmonic acid antagonize the biosynthesis of gibberellins and inhibit the growth of Nicotiana attenuata stems[J]. PLANT JOURNAL,2013,73(4):591-606.
APA	Heinrich, Maria.,Hettenhausen, Christian.,Lange, Theo.,Wuensche, Hendrik.,Fang, Jingjing.,...&Wu, Jianqiang.(2013).High levels of jasmonic acid antagonize the biosynthesis of gibberellins and inhibit the growth of Nicotiana attenuata stems.PLANT JOURNAL,73(4),591-606.
MLA	Heinrich, Maria,et al."High levels of jasmonic acid antagonize the biosynthesis of gibberellins and inhibit the growth of Nicotiana attenuata stems".PLANT JOURNAL 73.4(2013):591-606.

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