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Transcriptional and physiological data revealed cold tolerance in a photo-thermo sensitive genic male sterile line Yu17S

文献类型： 外文期刊

作者： Pan, Xiaoxue 1 ; Guan, Ling 1 ; Lei, Kairong 1 ; Li, Jingyong 2 ; Zhang, Xianwei 2 ;

作者机构： 1.Chongqing Acad Agr Sci, Chongqing Key Lab Advers Agr, Biotechnol Res Inst, Chongqing 401329, Peoples R China

2.Chongqing Acad Agr Sci, Chongqing Rationing Rice Res Ctr, Chongqing 402160, Peoples R China

关键词： PTGMS lines; Chilling stress; Transcriptional profiles; Carotenoid biosynthesis; Abscisic acid biosynthesis

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Rice is highly sensitive to chilling stress during the seedling stage. However, the adaptable photo-thermo sensitive genic male sterile (PTGMS) rice line, Yu17S, exhibits tolerance to low temperatures. Currently, the molecular characteristics of Yu17S are unclear. Results To evaluate the molecular mechanisms behind cold responses in rice seedlings, a comparative transcriptome analysis was performed in Yu17S during seedling development under normal temperature and low temperature conditions. In total, 9317 differentially expressed genes were detected. Gene ontology and pathway analyses revealed that these genes were involved mostly in photosynthesis, carotenoid biosynthesis, carbohydrate metabolism and plant hormone signal transduction. An integrated analysis of specific pathways combined with physiological data indicated that rice seedlings improved the performance of photosystem II when exposed to cold conditions. Genes involved in starch degradation and sucrose metabolism were activated in rice plants exposed to cold stress treatments, which was accompanied by the accumulation of soluble sugar, trehalose, raffinose and galactinol. Furthermore, chilling stress induced the expression of phytoene desaturase, 15-cis-zeta-carotene isomerase, zeta-carotene desaturase, carotenoid isomerase and beta-carotene hydroxylase; this was coupled with the activation of carotenoid synthase activity and increases in abscisic acid (ABA) levels in rice seedlings. Conclusions Our results suggest that Yu17S exhibited better tolerance to cold stress with the activation of carotenoid synthase activity and increasing of ABA levels, and as well as the expression of photosynthesis-related genes under cold condition in rice seedlings.

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