Comparative analysis of root transcriptome profiles between drought-tolerant and susceptible wheat genotypes in response to water stress
文献类型： 外文期刊
作者： Hu, Ling 1 ; Xie, Yan 1 ; Fan, Shoujin 2 ; Wang, Zongshuai 1 ; Wang, Fahong 1 ; Zhang, Bin 1 ; Li, Haosheng 1 ; Song, Jie 2 ;
作者机构： 1.Shandong Acad Agr Sci, Crop Res Inst, 202 Gongyebei Rd, Jinan 250100, Shandong, Peoples R China
2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Shandong, Peoples R China
关键词： Wheat (Triticumaestivum L); Drought; RNA-Seq; Root; Genotypes; Differentially expressed genes
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2018 年 272 卷
页码：
收录情况： SCI
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.
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