摘要
对拟南芥SDG26基因功能缺失突变体sdg26植株和对照野生型Col植株在干旱条件下的SOD活性和MDA、可溶性糖、脯氨酸含量进行测定。结果显示:随着干旱时间(5、8、11、14、17、20 d)持续,sdg26植株中的SOD活性和MDA、可溶性糖、脯氨酸含量都表现出明显提高的趋势,上升水平显著高于对照野生型Col植株;在持续干旱20 d条件下,Col植株的叶片逐渐失水干枯及至死亡,但sdg26植株能正常生长,表现出良好的生长势,推测SDG26基因功能的丧失可以增强拟南芥的抗旱能力,说明植物的抗旱能力与组蛋白的甲基化修饰密切相关。
SOD, MDA and the content of soluble sugar and proline in Arabidopsis mutant plant sdg26 and wild-type plant Col under drought condition were investigated. The results showed that SOD, MDA, the content of soluble sugar and proline increased with increasing period of drought stress （5, 8, 11, 14, 17, 20 d）, the increases were significantly greater in mutant plant sdg26 than those in wild type plant Col. In addition, water in leaves of wild-type plant Col gradually evaporated until death but mutant plant sdg26 still grew well after 20 days of drought stress. These results suggested that mutant plant sdg26 enhanced drought tolerance because of the loss of SDG26 gene function, which also indicated that histone methylation played an important role in drought stress tolerance in plants.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第4期377-380,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家自然科学基金项目(31071129)
关键词
拟南芥
sdg26
干旱胁迫
生理生化指标
Arabidopsis thaliana
sdg26
drought stress
physiological and biochemical indexes
