Physiological Genomics of Response to Soil Drying in Diverse

  本文关键词：Physiological Genomics，由笔耕文化传播整理发布。

以下是搜索结果

PLANT CELL, 2012; 24 (3): 893

Des Marais, DL; McKay, JK; Richards, JH; Sen, S; Wayne, T; Juenger, TE

Juenger, TE (reprint author), Univ Texas Austin, Sect Integrat Biol, Austin, TX 78712 USA.

Abstract
Arabidopsis thaliana, like many species, is characterized by abundant genetic variation. This variation is rapidly being cataloged at the sequence level, but careful dissection of genetic variation in whole-organism responses to stresses encountered in the natural environment are lacking; this functional variation can be exploited as a natural mutant screen to determine gene function. Here, we document physiological and transcriptomic response to soil drying in 17 natural accessions of Arabidopsis. By imposing ecologically realistic stress conditions, we found that acclimation in Arabidopsis involved a strong signature of increased investment in photosynthesis, carbohydrate turnover, and root growth. Our results extend previous work in the Columbia accession suggesting that abscisic acid signaling pathways play an important role in drought stress response. We also identified several mechanisms, including an increase in leaf nitrogen concentration and upregulation of two-component signaling relays, that were common to most natural accessions but had not been identified in studies using only the Columbia accession. Principal component analysis reveals strong correlations between suites of genes and specific physiological responses to stress. The functional variants we identified may represent adaptive mutations in natural habitats and useful variants for agronomic improvement of crop species.

PLANT CELL 影响因子：8.538    (投稿经验 | MedSci指数 | 杂志信息 )
原文下载：PDF文件下载

原文查看：Physiological Genomics of Response to Soil Drying in Diverse Arabidopsis Accessions

  本文关键词：Physiological Genomics，，由笔耕文化传播整理发布。