Response to Low Temperature and Evaluation on Cold Tolerance of Sugarcane at Seedling Stage

作     者：王振波 陈疏影 王先宏 何丽莲 李富生 Zhenbo WANG;Shuying CHEN;Xianhong WANG;Lilian HE;Fusheng LI

作者机构：云南农业大学农学与生物技术学院云南昆明650201 福建省农业科学院作物研究所福建福州350000 

出 版 物：《Agricultural Science & Technology》 (农业科学与技术（英文版）)

年 卷 期：2016年第17卷第2期

页      面：256-261,264页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Supported by National Natural Science Foundation of China(31560417) Applied Basic Research Program of Science and Technology Commission Foundation of Yunnan Province(2015FA024) Program for Industry Technology System of Cane in Yunnan(YCJ90) Key New Product Development Plan of Yunnan Province(2012BB014) Program for Innovation Research Team in Yunnan Province(YKRF18)~~ 

主　　题：Sugarcane Variety Cold tolerance Comprehensive evaluation Polar ordination 

摘      要：This study aimed to screen out cold-tolerant sugarcane cultivars through acomprehensive cold tolerance evaluation. A total of 9 sugarcane cultivars with good agronomic traits, bred by the Yunnan Agricultural University, were selected. They were treated by low temperaturestress （3 ℃）, and the changes of their cold-tolerant physiological and biochemical indices were monitored. The cold tolerance of the sugarcane cultivars was evaluated comprehensively by polar ordination. The results showed that the low temperature stress increased the averagemembrane conductivi- ty, soluble sugar content, MDA content, proline content, soluble protein content, chlorophyll content and peroxidase （POD） activity in sugarcane leaves by 21.21%, 134.1%, 83.60%, 35.47%, 47.72%, 9.07% and 565.2%, respectively, but decreased the superoxide dismutase （SOD） activity in sugarcane leaves by 19.67%. Among the 9 sugarcane cultivars, Dianzhe 03-91 showed the strongest cold tolerance, while Dianzhe 02-39 showed the poorest cold tolerance; the cold tolerance of Dianzhe 08-5, Dianzhe 05-103 and Dianzhe 01-58 was stronger than that of Dianzhe 04- 14, Dianzhe 04-429, Dianzhe 05-522 and Dianzhe 02-227.