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作 者 ：刘招龙^1，2;张绍铃¹;孙益林¹

期 刊 ：应用生态学报 2007年 18卷 07期 页码：1568-1572

关键词：梨；

摘 要 ：研究了0.3 mmol·L^-1一氧化氮供体硝普钠（SNP）对梨叶片感染轮纹病菌（Physalospora piricola Nose）后抗氧化酶及活性氧的影响.结果表明，经0.3 mmo1·L^-1
SNP处理后，梨叶片过氧化物酶（POD）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、多酚氧化酶（PPO）活性及抗坏血酸（ASA）、还原型谷胱甘肽（GSH）和脯氨酸(Pro)含量分别比接种对照组（喷清水接种处理，CK₁）提高了39.41%、21.11%、41.61%、13.04%、44.45%、48.32%和33.80%；丙二醛（MDA）、过氧化氢（H₂O₂)含量及超氧阴离子（O₂^-）产生速率分别比CK₁组降低了20.45%、6.93%和6.27%.表明较低浓度的SNP可缓解轮纹病菌对梨叶片的伤害作用.

Abstract:This paper studied the effects of 0.3 mmol·L^-1 SNP on the antioxidant enzymes and reactive oxygen in pear leaves infected by Physalosproa piricola Nose. The results showed that compared with CK₁ (spraying leaves with water and infecting with P. piricola Nose), 0.3 mmol·L^-1 SNP could increase the activities of leaf POD, SOD, CAT and PPO and the contents of leaf ASA, GSH and proline by 39.41%, 21.11%, 41.61%, 13.04%, 44.45%, 48.32% and 33.80%, while decrease the contents of leaf MDA and H₂O₂ and the generating rate of O₂^- by 20.45%, 6.93% and 6.27%, respectively, indicating that lower concentration SNP could reduce the damage of P. piricola Nose to pear leaves.

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