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首页> 外文期刊>Plant Science: An International Journal of Experimental Plant Biology >Comparative analysis of root transcriptome profiles between drought-tolerant and susceptible wheat genotypes in response to water stress
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Comparative analysis of root transcriptome profiles between drought-tolerant and susceptible wheat genotypes in response to water stress

机译：耐旱性小麦基因型与水分应激响应的耐旱性和易感小麦基因型的对比分析

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摘要

Water deficit is one of the major factors limiting crop productivity worldwide. Plant roots play a key role in uptaking water, perceiving and transducing of water deficit signals to shoot. Although the mechanisms of drought-tolerance have been reported recently, the transcriptional regulatory network of wheat root response to water stress has not been fully understood. In this study, drought-tolerant cultivar JM-262 and susceptible cultivar LM-2 are planted to characterize the root transcriptional changes and physiological responses to water deficit. A total of 8197 drought tolerance-associated differentially expressed genes (DEGs) are identified, these genes are mainly mapped to carbon metabolism, flavonoid biosynthesis, and phytohormone signal transduction. The number and expression level of DEGs involved in antioxidative and antiosmotic stresses are more enhanced in JM-262 under water stress. Furthermore, we find the DEGs related to root development are much more induced in JM-262 in phytohormone signal transduction and carbon metabolism pathway. In conclusion, JM-262 may alleviate the damage of drought by producing more osmoprotectants, ROS scavengers, biomass and energy. Interestingly, hormone signaling and cross-talk probably play an important role in promoting JM-262 greater root systems to take up more water, higher capabilities to induce more drought-related DEGs and higher resisitance to oxidative stresse.
机译：水资源赤字是全球范围内限制作物生产力的主要因素之一。植物根在上层水中发挥着关键作用，感知和转换水缺陷信号拍摄。尽管最近报道了耐旱的机制，但尚未完全理解对水分压力的小麦根本反应的转录调节网络。在该研究中，种植耐旱培养的栽培品种JM-262和易感品种LM-2，以表征根部转录变化和对水赤字的生理反应。鉴定了总共8197种耐水性相关的差异表达基因（DEGS），这些基因主要映射到碳代谢，黄酮类生物合成和植物激素信号转导。在水胁迫下，抗氧化和抗渗滤应力参与的次数的数量和表达水平在JM-262中更高。此外，我们发现与根部发育相关的Degs在植物激素信号转导和碳代谢途径中诱导JM-262。总之，JM-262可以通过生产更多的OsmoProtectants，ROS清除剂，生物质和能量来缓解干旱的损害。有趣的是，激素信号和串扰可能在促进JM-262更大的根系中发挥重要作用，以占据更多的水，更高的能力，以诱导更多的干旱相关的参数和对氧化胁迫的更高的归因。

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