文献类型：期刊文献

英文题名：Chitooligosaccharides enhance cold tolerance by repairing photodamaged PS II in rice

作者：Zhou, Jiachun[1];Chen, Qiao[1,2];Zhang, Yang[1,2];Fan, Liqiang[1,2];Qin, Zhen[1];Chen, Qiming[1];Qiu, Yongjun[1,2];Jiang, Lihua[1];Zhao, Liming[1,2]

机构：[1]East China Univ Sci & Technol, RandD Ctr Separat & Extract Technol Fermentat Ind, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Shanghai Collaborat Innovat Ctr Biomfg Technol SC, Shanghai 200237, Peoples R China

年份：2018

卷号：156

期号：7

起止页码：888

外文期刊名：JOURNAL OF AGRICULTURAL SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000454415900004)】；

基金：This work was financially supported by "Shuguang Program" project supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (NO. 15SG28) and National High Technology Research and Development Program of China (863 Program) (No. SS2014AA021202). We also wish to thank Shanghai Academy of Agricultural Sciences, China for providing the II YOU 1259 rice seed.

语种：英文

外文关键词：Chitooligosaccharides; cold tolerance; PS II repairing; rice; stress-responsive gene

摘要：Chitooligosaccharides (COS) are multi-functional foods and nutrients and environmentally friendly biological abiotic-resistance inducing agents for plants. In the current study, the effects and possible mechanisms of COS on improving the cold resistance of rice (II YOU 1259) seedlings were investigated. Compared with the control, a COS pre-soaking treatment enhanced photosynthesis, reduced oxidation damage and led to accumulation of more osmotic regulation substances under chilling treatment. In addition, a novel Deg/HtrA family serine endopeptidase (DegQ) gene, related to COS enhanced rice cold resistance, was identified. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis revealed that transcription of DegQ and psbA (D1 protein encoding gene) were up-regulated in a time-dependent manner by COS treatment under cold stress. With increasing expression of the D1 protein, chlorophyll b content was enhanced correspondingly. The current results suggest that COS could enhance cold stress tolerance of rice by repairing the photodamaged photosystem II, altering osmotic regulation and reducing oxidation damage.