摘要
以番茄幼苗为材料,采用一氧化氮供体硝普钠处理番茄幼苗,探讨不同浓度硝普钠处理对干旱胁迫下番茄叶片叶绿素荧光初始参数、净光合效率、抗氧化酶活性等生理指标的影响。结果表明,0.1 mmol/L硝普钠处理,可有效降低叶片中的MDA含量,维持较高水平的Fv/Fm、POD、SOD与CAT活性,而经0.5 mmol/L硝普钠处理后,加剧了叶片中MDA的积累,叶片中Fv/Fm、POD、SOD与CAT活性显著低于对照,可见,0.1 mmol/L硝普钠处理可有效缓解番茄幼苗的干旱胁迫,而0.5 mmol/L硝普钠处理则加剧了叶片的膜脂过氧化,加重了干旱胁迫的发生。
The nitric oxide donor SNP were used to treat the seedlings of the tomato,the physiological parameters including the original fluorescence parameters,the activities of POD,SOD and CAT,the content of MDA were determinated to test the effects of NO.As a result,the leaf with 0.1 mmol/L SNP treatment maintained the high value of Fv/Fm,POD,SOD and CAT.The MDA content was lower than that in the control and 0.5 mmol/L SNP treatment.On the contrary,0.5 mmol/L SNP treatment enhanced the drought stress.The values of Fv/Fm,POD,SOD and CAT were significantly lower than that in the control and 0.5 mmol/L SNP treatment.The results showed that 0.1 mmol/L SNP treatment effectively alleviated the drought stress in contrast to the contrary effects of 0.5 mmol/L SNP treatment.
作者
夏承东
方大伟
XIA Cheng-dong;FANG Da-wei(Anhui Huida Agriculture Co.,Ltd.,Hefei,Anhui 230088)
出处
《安徽农业科学》
CAS
2020年第15期61-63,共3页
Journal of Anhui Agricultural Sciences
基金
安徽省科技重大专项(17030701002)。
关键词
一氧化碳
干旱胁迫
叶绿素初始荧光参数
抗氧化系统
Nitric oxide
Drought stress
Original parameters of chlorophyll fluorescence
Antioxidant system
