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首页> 外文期刊>Plant Physiology and Biochemistry >Transcriptional variation in response to salt stress in commonly used Arabidopsis thaliana accessions
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Transcriptional variation in response to salt stress in commonly used Arabidopsis thaliana accessions

机译：常用拟南芥种质对盐胁迫响应的转录变化

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摘要

Transcriptional variation is increasingly recognized as a component of genetic diversity and environmental adaptation. It can also provide insights into stress responsive determinants and underlying adaptive mechanisms. Prior studies showed phenotypic differences in response to salinity stress for two widely used Arabidopsis thaliana accessions, Wassilewskija-2 (Ws) and Columbia-0 (Col). This study examined changes in global gene expression in relation to differences in response to salt stress among Ws, Col, and the glabrous mutant of Col [Col(gl)]. Transcripts most highly affected by accession and salt stress were related to abiotic or biotic stress responses. Approximately 60% of salt-induced changes in Ws overlapped with changes in Col, suggesting common salt stress responses. However, a markedly greater number of genes was altered in the highly salt sensitive Col, likely reflecting both adaptive responses and salt injury. The Col(gl) transcriptome was least affected by salt. Many salt-responsive transcripts observed in Col were altered in Col(gl) prior to salt stress, indicating that even without salt, the gl1-1 mutation induced a suite of stress responsive genes. Regardless of salt stress, there were greater transcriptomic differences between Col and Col(gl) than between Col and Ws. The transcript expression differences between [Ws vs. Col] and [Col(gl) vs. Col] formed largely non-overlapping sets. Thus, although Ws, Col and Col(gl) are commonly and sometimes interchangeably used, here they displayed distinct responses. Collectively, their observed expression differences likely reflect a combination of adaptive traits, response to injury, or phenotypic buffering of mutational effects.
机译：转录变异日益被认为是遗传多样性和环境适应的组成部分。它还可以提供有关压力响应决定因素和潜在适应机制的见解。先前的研究表明，两种广泛使用的拟南芥品种Wassilewskija-2（Ws）和Columbia-0（Col）对盐分胁迫的表型差异。这项研究检查了全球基因表达的变化与Ws，Col和Col [gol（gl）]无性突变体之间对盐胁迫的响应差异有关。受登录和盐胁迫影响最大的转录本与非生物或生物胁迫响应有关。大约60％的盐诱导的Ws变化与Col的变化重叠，表明常见的盐胁迫响应。但是，在高度盐敏感性的Col中，明显更多的基因被改变，可能反映了适应性反应和盐损伤。 Col（gl）转录组受盐的影响最小。在盐胁迫之前，在Col中观察到的许多盐响应转录物在Col（gl）中都发生了变化，这表明即使没有盐，gl1-1突变也会诱导出一组应力响应基因。不论盐胁迫如何，Col和Col（gl）之间的转录组差异均大于Col和Ws之间的转录组差异。 [Ws vs. Col]和[Col（gl）vs. Col]之间的转录本表达差异形成了大部分不重叠的集合。因此，尽管通常，有时互换使用Ws，Col和Col（gl），但此处它们显示出截然不同的响应。总的来说，它们观察到的表达差异可能反映了适应性状，对损伤的反应或突变效应的表型缓冲的组合。

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