外源H_(2)O_(2)对盐胁迫下甜瓜生理特性的影响  

Effect of exogenous H_(2)O_(2) on physiological characteristics of melon under salt stress

作　　者：贾庆美 胡克玲[2] JIA Qinmei;HU Keing(Jinzhai Agricultural Industry Development Center,Jinzhai 237300,China;Anhui Agricultural University,Hefei 230036,China)

机构地区：[1]金寨县农业产业发展中心,安徽金寨237300 [2]安徽农业大学园艺学院,安徽合肥230036

出　　处：《安徽农学通报》2023年第14期39-42,55,共5页Anhui Agricultural Science Bulletin

摘　　要：为了解外源H_(2)O_(2)对盐胁迫下甜瓜生长发育的影响,本研究以甜瓜“小麦酥”为试材,以NaCl作为盐胁迫处理,研究不同浓度的H_(2)O_(2)对盐胁迫下甜瓜生长及相关生理特性的影响。结果表明,盐胁迫抑制了甜瓜生长,叶绿素含量和GSH/GSSG比值降低,但膜脂过氧化水平、SOD和CAT的酶活性、GSSG和GSH+GSSG含量提高。适宜浓度的H_(2)O_(2)能缓解盐胁迫对甜瓜生长的影响,有效提高甜瓜逆境下叶绿素水平。施用H_(2)O_(2)能较好地缓解膜脂过氧化,激活甜瓜逆境下的抗氧化酶活性,但随着H_(2)O_(2)处理浓度的提高,对甜瓜盐胁迫伤害的缓解效应下降,氧化还原指标呈先升高后降低的趋势。因此,H_(2)O_(2)处理对盐胁迫下甜瓜的逆境伤害具有缓解作用,且具有一定的浓度效应,当H_(2)O_(2)浓度为10~15mmol/L时,能较好地提高甜瓜植株对逆境的抵抗能力。To explore the effect of exogenous H_(2)O_(2) on the growth of melon under salt stress,this paper took the“Xiaomaisu”melon variety as the experimental object,designed different treatments to study the growth and physiological characters of melon.The results showed that the growth of melon was inhibited under salt stress,and the ratio of GSH/GSSG and the content of chlorophyll was decreased.But the level of membrane lipid peroxidation,the activity of SOD and CAT,and the content of GSSG and GSH+GSSG were increased in melon under salt stress.However,appropriate concentration of H_(2)O_(2) could alleviate the growth of melon and improved the content of chlorophyll of melon under salt stress.As the concentration of H_(2)O_(2) increased,it was reduced mitigation effect of melon under salt stress,the indicator of redox was increased at first and then decreased.Therefore,proper concentration of H_(2)O_(2)treatment could alleviate the damage of salt stress on melon.When the concentration of H_(2)O_(2) was 10-15 mmol/L,it could improve resistance to adversity.

关 键 词：甜瓜 盐胁迫 过氧化氢 

分 类 号：S652[农业科学—果树学]