Loss of ACS7 confers abiotic stress tolerance by modulating ABA   sensitivity and accumulation in Arabidopsis

doi:10.1093/jxb/err143

CORC > 北京大学 > 生命科学学院

	Loss of ACS7 confers abiotic stress tolerance by modulating ABA sensitivity and accumulation in Arabidopsis
	Dong, Hui ; Zhen, Zhiqin ; Peng, Jinying ; Chang, Li ; Gong, Qingqiu ; Wang, Ning Ning
刊名	journal of experimental botany
	2011
关键词	Abiotic stresses abscisic acid AtACS7 cross-talk ethylene ABSCISIC-ACID ETHYLENE BIOSYNTHESIS GENE-EXPRESSION DIFFERENTIAL EXPRESSION TRANSCRIPTION FACTOR SIGNAL-TRANSDUCTION PLANT-RESPONSES SALICYLIC-ACID CROSS-TALK THALIANA
DOI	10.1093/jxb/err143
英文摘要	The phytohormones ethylene and abscisic acid (ABA) play essential roles in the abiotic stress adaptation of plants, with both cross-talk of ethylene signalling and ABA biosynthesis and signalling reported. Any reciprocal effects on each other's biosynthesis, however, remain elusive. ACC synthase (ACS) acts as the key enzyme in ethylene biosynthesis. A pilot study on changes in ACS promoter activities in response to abiotic stresses revealed the unique involvement in abiotic stress responses of the only type 3 ACC synthase, ACS7, among all nine ACSs of Arabidopsis. Hence an acs7 mutant was characterized and its abiotic stress responses were analysed. The acs7 mutant germinated slightly faster than the wild type and subsequently maintained a higher growth rate at the vegetative growth stage. Ethylene emission of acs7 was merely one-third of that of the wild type. acs7 exhibited enhanced tolerance to salt, osmotic, and heat stresses. Furthermore, acs7 seeds were hypersensitive to both ABA and glucose during germination. Transcript analyses revealed that acs7 had elevated transcript levels of the stress-responsive genes involved in the ABA-dependent pathway under salt stress. The ABA level was also higher in acs7 following salt treatment. Our data suggest that ACS7 acts as a negative regulator of ABA sensitivity and accumulation under stress and appears as a node in the cross-talk between ethylene and ABA.; Plant Sciences; SCI(E); 0; ARTICLE; 14; 4875-4887; 62
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/394277]
专题	生命科学学院
推荐引用方式 GB/T 7714	Dong, Hui,Zhen, Zhiqin,Peng, Jinying,et al. Loss of ACS7 confers abiotic stress tolerance by modulating ABA sensitivity and accumulation in Arabidopsis[J]. journal of experimental botany,2011.
APA	Dong, Hui,Zhen, Zhiqin,Peng, Jinying,Chang, Li,Gong, Qingqiu,&Wang, Ning Ning.(2011).Loss of ACS7 confers abiotic stress tolerance by modulating ABA sensitivity and accumulation in Arabidopsis.journal of experimental botany.
MLA	Dong, Hui,et al."Loss of ACS7 confers abiotic stress tolerance by modulating ABA sensitivity and accumulation in Arabidopsis".journal of experimental botany (2011).