棉花学报2012，Vol.24Issue(3)：265-271,7.
外源一氧化氮对棉花种子吸胀期间耐冷性和发芽能力的影响
Effect of Exogenous Nitric Oxide on Chilling Tolerance and Seed Germination of Cotton Seed during Seed Imbibition
摘要
Abstract
Cotton varieties with different temperature sensitivities were used to explore the effect of the exogenous nitric oxide donor sodium nitroprusside (SNP) on chilling tolerance and germinability of cotton seed during the imbibition period. The results showed that, under low temperature stress, nitric oxide treatment increased activities of peroxidase (POD), catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), and soluble protein and proline (Pro) contents, and decreased the relative conductivity and malondialdehyde (MDA) content in the embryo of cotton seed. The nitric oxide treatment also significantly increased the average germination rate and shortened the germination time. After 48 h of seed imbibition at low temperature, the germination rate was increased by 29.85% and the germination time was decreased by 3 d in the SNP treatment compared with the control. These results indicate that nitric oxide treatment can improve the chilling tolerance during the seed imbibition period and enhance seed germination ability.关键词
一氧化氮/低温胁迫/抗氧化酶/发芽/棉花Key words
nitric oxide/ chilling stress/ antioxidant enzyme/ germination/ cotton分类
农业科技引用本文复制引用
杨美森,虎晓兵,罗宏海,张亚黎,张旺锋..外源一氧化氮对棉花种子吸胀期间耐冷性和发芽能力的影响[J].棉花学报,2012,24(3):265-271,7.基金项目
国家科技支撑计划项目(2006BAD21B02) （2006BAD21B02）
教育部高等学校博士学科点专项科研基金(20070759002) （20070759002）
