文献类型：期刊文献

英文题名：Chitooligosaccharide plays essential roles in regulating proline metabolism and cold stress tolerance in rice seedlings

作者：Zhang, Yang[1,2];Fan, Liqiang[1,2];Zhao, Mengyao[1,2];Chen, Qiming[1,2];Qin, Zhen[1,2];Feng, Zhihang[3];Fujiwara, Toru[3];Zhao, Liming[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, R&D Ctr Separat & Extract Technol Fermentat Ind, Sch Biotechnol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Collaborat Innovat Ctr Biomfg Technol SC, Shanghai 200237, Peoples R China;[3]Univ Tokyo, Grad Sch Agr & Life Sci, Tokyo, Japan

年份：2019

卷号：41

期号：6

外文期刊名：ACTA PHYSIOLOGIAE PLANTARUM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000465542500002)】；

基金：The study was supported by The National Key Research and Development Program of China (2017YFB0309302), The "Shu Guang" project of Shanghai Municipal Education Commission and Shanghai Education Development Foundation (15SG28), the Fundamental Research Funds for the Central Universities (222201717026) and the 111 Project (B18022). We would like to thank Dr. Waheed Ahmad for English editing.

语种：英文

外文关键词：Chitooligosaccharide; Rice seedlings; Cold stress; Glutamate synthesis; Proline metabolism

摘要：Rice is one of the most important crops around the world. The cold temperature as a major abiotic stress occurs frequently affecting rice growth and final plant yield. Chitooligosaccharide (COS) has been reported as an elicitor of plant immunity that can improve plant seedling tolerance to cold stress. However, the mechanisms on the enhanced cold tolerance is unclear. Here, we report that the rice seedlings treated by COS demonstrated good cold tolerance with promoted root vigor and plant growth. COS could increase contents of proline and glutamate in the seedlings. Moreover, expression analysis revealed COS significantly induced the transcripts of the key genes associated with the glutamate and proline biosynthesis pathway during cold stress. These results indicate that COS enhanced seedling growth and cold tolerance in rice may be caused by the osmotic regulation through the accumulations of glutamate and proline to provide significant osmo-protection.