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

CORC > 昆明植物研究所 > 中国科学院昆明植物研究所 > 资源植物与生物技术所级重点实验室

	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
刊名	PLANT JOURNAL
	2013
卷号	73 期号:4 页码:591-606
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
ISSN号	0960-7412
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
英文摘要	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.
学科主题	Plant Sciences
收录类别	SCI
资助信息	Max Planck Society
语种	英语
公开日期	2013-07-24
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/16601]
专题	昆明植物研究所_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.