Global Expressions Landscape of NAC Transcription Factor Family and Their Responses to Abiotic Stresses in Citrullus lanatus.
Global Expressions Landscape of NAC Transcription Factor Family and Their Responses to Abiotic Stresses in Citrullus lanatus.
复制标题
西瓜 NAC 转录因子家族的整体表达格局及其对非生物胁迫的响应
DOI：
10.1038/srep30574
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发表时间：
2016-08-05
影响因子：
4.6
通讯作者：
Hu Z
中科院分区：
文献类型：
--
作者：
Lv X;Lan S;Guy KM;Yang J;Zhang M;Hu Z
西瓜（Citrullus lanatus）是一种耐旱、耐盐、耐冷的旱生植物。这些特性使其成为研究耐盐、耐旱、耐寒性的模式作物。本研究首次对ClNAC转录因子（TF）家族进行了全基因组的综合分析，以探讨其在非生物胁迫下的转录谱和潜在功能。表达谱分析表明，一些NAC转录因子对非生物胁迫和发育高度响应，例如，亚家族IV NAC可能在干旱或盐条件下维持水分状态以及水分和代谢物向果实的传导和转运中发挥作用。相反，大多数ClNAC对低温逆境的快速和消极反应可能与对冷胁迫的敏感性有关。基于ClNAC基因的表达，讨论了这些非生物胁迫和激素（脱落酸和茉莉酸）途径之间的串扰。我们的研究结果将为西瓜中NAC家族的功能挖掘以及其他经济作物非生物耐受性的机制提供有用的见解。
Watermelon (Citrullus lanatus) is one xerophyte that has relative higher tolerance to drought and salt stresses as well as more sensitivity to cold stress, compared with most model plants. These characteristics facilitate it a potential model crop for researches on salt, drought or cold tolerance. In this study, a genome-wide comprehensive analysis of the ClNAC transcription factor (TF) family was carried out for the first time, to investigate their transcriptional profiles and potential functions in response to these abiotic stresses. The expression profiling analysis reveals that several NAC TFs are highly responsive to abiotic stresses and development, for instance, subfamily IV NACs may play roles in maintaining water status under drought or salt conditions, as well as water and metabolites conduction and translocation toward fruit. In contrast, rapid and negative responses of most of the ClNACs to low-temperature adversity may be related to the sensitivity to cold stress. Crosstalks among these abiotic stresses and hormone (abscisic acid and jasmonic acid) pathways were also discussed based on the expression of ClNAC genes. Our results will provide useful insights for the functional mining of NAC family in watermelon, as well as into the mechanisms underlying abiotic tolerance in other cash crops.