Transcriptome and physiological analyses reveal that AM1 as an ABA-mimicking ligand improves drought resistance in Brassica napus

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	Transcriptome and physiological analyses reveal that AM1 as an ABA-mimicking ligand improves drought resistance in Brassica napus
	Xiong, Jun-Lan; Dai, Lu-Lu; Ma, Ni; Zhang, Chun-Lei
刊名	PLANT GROWTH REGULATION
	2018-05-01
卷号	85 期号:1 页码:73-90
关键词	AM1 Transcriptome Drought resistance ABA signaling pathway Photosynthesis Survival rate
ISSN号	0167-6903
文献子类	Article
英文摘要	Abscisic acid (ABA) is the most important stress hormone in the regulation of plant adaptation to drought. Owing to the chemical instability and rapid catabolism of ABA, ABA mimic 1 (AM1) is frequently applied to enhance drought resistance in plants, but the molecular mechanisms governed by AM1 on improving drought resistance in Brassica napus are not entirely understood. To investigate the effect of AM1 on drought resistance at the physiological and molecular levels, exogenous ABA and AM1 were applied to the leaves of two B. napus genotypes (Q2 and Qinyou 8) given progressive drought stress. The results showed that the leaves of 50 A mu M ABA- and AM1-treated plants shared over 60% differential expressed genes and 90% of the enriched functional pathways in Qinyou 8 under drought. AM1 affected the expression of the genes involved in ABA signaling; they down-regulated pyrabactin resistance/PYR1-like (PYR/PYLs), up-regulated type 2C protein phosphatases (PP2Cs), partially up-regulated sucrose non-fermenting 1-related protein kinase 2s (SnRK2s), and down-regulated ABA-responsive element (ABRE)-binding protein/ABRE-binding factors (AREB/ABFs). Additionally, AM1 treatment repressed the expression of photosynthesis-related genes, those mainly associated with the light reaction process. Moreover, AM1 decreased the stomatal conductance, the net photosynthetic rate, and the transpiration rate, but increased the relative water content in leaves and increased survival rates of two genotypes under drought stress. Our findings suggest that AM1 has a potential to improve drought resistance in B. napus by triggering molecular and physiological responses to reduce water loss and impair growth, leading to increased survival rates.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40690]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Xiong, Jun-Lan,Dai, Lu-Lu,Ma, Ni,et al. Transcriptome and physiological analyses reveal that AM1 as an ABA-mimicking ligand improves drought resistance in Brassica napus[J]. PLANT GROWTH REGULATION,2018,85(1):73-90.
APA	Xiong, Jun-Lan,Dai, Lu-Lu,Ma, Ni,&Zhang, Chun-Lei.(2018).Transcriptome and physiological analyses reveal that AM1 as an ABA-mimicking ligand improves drought resistance in Brassica napus.PLANT GROWTH REGULATION,85(1),73-90.
MLA	Xiong, Jun-Lan,et al."Transcriptome and physiological analyses reveal that AM1 as an ABA-mimicking ligand improves drought resistance in Brassica napus".PLANT GROWTH REGULATION 85.1(2018):73-90.