文献类型：期刊文献

英文题名：Exogenous Spermidine Improves Chilling Tolerance in Sweet Corn Seedlings by Regulation on Abscisic Acid, ROS and Ca2+ Pathways

作者：Cai, Shuyu[1];Wang, Guofu[1];Xu, Hua[1];Liu, Jianxin[1];Luo, Jie[1];Shen, Yi[1]

机构：[1]Shaoxing Univ, Yuanpei Coll, Qunxianzhong Rd 2799, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：64

期号：6

起止页码：487

外文期刊名：JOURNAL OF PLANT BIOLOGY

收录：SCI-EXPANDED(收录号：WOS:000651356900001)、、WOS

基金：This research was supported by the Startup Foundation for Introducing Talent of Shaoxing University Yuanpei College (9999910302).

语种：英文

外文关键词：Spermidine; Chilling stress; Sweet corn; Abscisic acid; Reactive oxygen species; Ca2+ transport

外文摘要：Chilling stress is a major abiotic constraint that affects sweet corn seedling establishment. Spermidine (Spd) is known to participate in the cold stress response in plants, nonetheless, the molecular mechanisms are largely unknown. The present study reported that exogenous Spd not only stimulated seedling growth but also enhanced photosynthetic attributes under chilling stress. Further analysis revealed that Spd application resulted in depressed abscisic acid (ABA) content and affected the expression of ABA-responsive genes. The augmented antioxidant enzymes activities, coupled with declined reactive oxygen species (ROS) content, were observed in response to Spd treatment under chilling stress. Moreover, Spd up-regulated the transcription levels of some Ca2+ transport-related genes. We propose that Spd contributes to cold tolerance in sweet corn seedlings via the regulation of genes involved in the ROS, ABA pathways and Ca2+ transport.