| 外源一氧化氮供体SNP 对NaCl 胁迫下多裂骆驼蓬幼苗氧化损伤的保护效应 |
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| 引用本文： | 刘建新,王鑫,李博萍.外源一氧化氮供体SNP 对NaCl 胁迫下多裂骆驼蓬幼苗氧化损伤的保护效应[J].干旱地区农业研究,2009,27(6):139-143. |
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| 作者姓名： | 刘建新 王鑫 李博萍 |
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| 作者单位： | 陇东学院生命科学系,甘肃,庆阳,745000 |
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| 基金项目： | 甘肃省教育厅科研基金资助项目 |
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| 摘 要： | 研究了外源一氧化氮(NO)供体硝普钠(SNP)对NaCl胁迫下多裂骆驼蓬幼苗生长和氧化损伤的影响.结果表明:正常生长条件下喷施SNP能促进多裂骆驼蓬幼苗的生长,而NO信号传递途径关键酶鸟苷酸环化酶(GC)抑制剂亚甲基蓝(MB)明显抑制幼苗的生长;喷施SNP预处理显著缓解了NaCl胁迫对幼苗生长的抑制,明显降低了NaCl胁迫下叶片丙二醛(MDA)、超氧阴离子(O_2~(·-))和H_2O_2的积累及过氧化氢酶(CAT)活性,提高了超氧化物歧化酶(SOD)、过氧化物酶(POD)和抗坏血酸过氧化物酶(APX)活性;使抗坏血酸(ASA)和谷胱甘肽(GSH)含量及(Spd+Spm)/Put比值显著提高,而MB逆转了SNP对NaCl胁迫幼苗生长的促进作用及MDA、H_2O_2、CAT、POD、ASA、GSH和(Spd+Spm)/Put的调节作用,但对SNP调节O_2~(·-)、SOD和APX的效应无明显影响.表明外源NO可能通过GC介导的cGMP依赖和非cGMP依赖两条途径参与盐胁迫下活性氧代谢的调节,从而缓解盐胁迫导致的氧化损伤,促进多裂骆驼蓬幼苗的生长.
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| 关 键 词： | 多裂骆驼蓬 一氧化氮 NaCl胁迫 氧化损伤 |
Effects of exogenous nitric oxide donor SNP on protecting Peganum multisectum seedlings from oxidative damage under NaCl stress |
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| LIU Jianxin,WANG Xin,LI Boping.Effects of exogenous nitric oxide donor SNP on protecting Peganum multisectum seedlings from oxidative damage under NaCl stress[J].Agricultural Research in the Arid Areas,2009,27(6):139-143. |
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| Authors: | LIU Jianxin WANG Xin LI Boping |
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| Institution: | LIU Jian-xin,WANG Xin,LI Bo-ping(Department of Life Science,Longdong University,Qingyang,Gansu 745000,China) |
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| Abstract: | Effects of exogenous nitric oxide(NO) donor sodium nitroprusside(SNP) on growth of Peganum multisectum Bobr seedlings and protecting them from oxidative damage under salt stress were investigated.The results indicated that spraying SNP on leaves increased the growth of P.multisectum seedlings in normal growth conditions,but exogenous methylene blue,the inhibitor of the key enzyme guanylyl cyclase during signal transfer of NO,decreased significantly the growth of P.multisectum seedlings.Spraying SNP pretreat... |
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| Keywords: | Peganum multisectum Bobr nitric oxide NaCl stress oxidative damage |
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