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Nucleotide Variation in the NCED3 Region of Arabidopsis thaliana and its Association Study with Abscisic Acid Content under Drought Stress

文献类型： 外文期刊

作者： Hao, Gang-Ping 1 ; Zhang, Xiu-Hai 1 ; Wang, Yong-Qin 1 ; Wu, Zhong-Yi 1 ; Huang, Cong-Lin 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Agro Biotechnol Res Ctr, Beijing 100097, Peoples R China

2.Taishan Med Coll, Tai An 271000, Peoples R China

关键词： abscisic acid;Arabidopsis thaliana;water stress

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

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收录情况： SCI

摘要： Drought tolerance is a comprehensive quantitative trait that is being understood further at the molecular genetic level. Abscisic acid (ABA) is the main drought-induced hormone that regulates the expression of many genes related to drought responses. 9-cis-epoxycarotenoid dioxygenase (NCED3) is thought to be a key enzyme in ABA biosynthesis. In this paper, we measured the ABA content increase under drought stress, and sequenced and compared the sequence of AtNCED3 among 22 Arabidopsis thaliana accessions. The results showed that the fold of ABA content increase under drought stress was highly variable among these accessions. High density single nucleotide polymorphism (SNP) and insertion/deletion (indel) were found in the AtNCED3 region, on average one SNP per 87.4 bp and one indel per 502 bp. Nucleotide diversity was significantly lower in the coding region than that in non-coding regions. The results of an association study with anova analysis suggested that the 274th site (P[leftright arrow]S) and the 327th site (P[leftright arrow]R) amino acid variations might be the cause of ABA content increase of 163av accession under drought stress.

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