Comparative transcriptomic analyses of two sugarcane Saccharum L. cultivars differing in drought tolerance

Frontiers in Plant Science

Plant Science

Liqiu Tang¹  Ronghua Zhang²  Hui Zhou²  Kai Zhu²  Rongzhong Yang²  Yiyun Gui²  Jinju Wei²  Xihui Liu²  Haibi Li³ 

[1] Guangxi South Subtropical Agricultural Science Research Institute, Guangxi Academy of Agricultural Sciences, Chongzuo, China;Sugarcane Research Center of Chinese Academy of Agricultural Sciences, Nanning, China;Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, Nanning, China;Sugarcane Research Center of Chinese Academy of Agricultural Sciences, Nanning, China;Guangxi Key Laboratory of Sugarcane Genetic Improvement, Guangxi Academy of Agricultural Sciences, Nanning, China;Guangxi South Subtropical Agricultural Science Research Institute, Guangxi Academy of Agricultural Sciences, Chongzuo, China;

关键词: sugarcane;    drought;    transcriptome;    variety;    metabolic pathways;    photosynthesis;   

DOI  :  10.3389/fpls.2023.1243664

 received in 2023-06-21, accepted in 2023-09-27,  发布年份 2023

来源: Frontiers

【 摘 要 】

Sugarcane (Saccharum spp.) is an important cash crop, and drought is an important factors limiting its yield. To study the drought resistance mechanism of sugarcane, the transcriptomes of two sugarcane varieties with different levels of drought resistance were compared under different water shortage levels. The results showed that the transcriptomes of the two varieties were significantly different. The differentially expressed genes were enriched in starch and sucrose metabolism, linoleic acid metabolism, glycolysis/gluconeogenesis, and glyoxylate and dicarboxylate metabolic pathways. Unique trend genes of the variety with strong drought resistance (F172) were significantly enriched in photosynthesis, mitogen-activated protein kinases signaling pathway, biosynthesis of various plant secondary metabolites, and cyanoamino acid metabolism pathways. Weighted correlation network analysis indicated that the blue4 and plum1 modules correlated with drought conditions, whereas the tan and salmon4 modules correlated with variety. The unique trend genes expressed in F172 and mapped to the blue4 module were enriched in photosynthesis, purine metabolism, starch and sucrose metabolism, beta-alanine metabolism, photosynthesis-antenna proteins, and plant hormone signal transduction pathways. The expression of genes involved in the photosynthesis-antenna protein and photosynthesis pathways decreased in response to water deficit, indicating that reducing photosynthesis might be a means for sugarcane to respond to drought stress. The results of this study provide insights into drought resistance mechanisms in plants, and the related genes and metabolic pathways identified may be helpful for sugarcane breeding in the future.

【 授权许可】

Unknown   
Copyright © 2023 Li, Gui, Zhu, Wei, Zhang, Yang, Tang, Zhou and Liu