稻白叶枯菌弱毒株诱导的系统抗性——兼论与防御酶活性的变化

journal6 ›› 2000, Vol. 21 ›› Issue (2): 58-62.

稻白叶枯菌弱毒株诱导的系统抗性——兼论与防御酶活性的变化

(湘潭师范学院生物系, 湖南湘潭 411201)

出版日期:2000-06-15 发布日期:2013-01-16
作者简介:曹赐生( 1962~ ) ,男, 湖南湘乡生,湘潭师范学院生物系讲师,主要从事微生物研究

Rice Systemic Resistance Induced by Xanthomonas oryzae pv. oryzae Strain With Weak Virulence——And Changes of Defense Enzyme Activities

( Biology Department of Xiangtan Normal University, Xiangtan 411201,Hunan China)

Online:2000-06-15 Published:2013-01-16

摘要/Abstract

摘要：2 个品种(余水糯, 浙辐802)的水稻幼苗经白叶枯菌( Xanthomonas oryzae pv. oryzae) 弱毒株75-1处理后,均获得了对白叶枯菌强毒株 76-25 的系统抗性,超氧化物歧化酶( SOD) 、过氧化氢酶( CAT) 活性下降, 脂氧合酶( LOX)、丙二醛含量升高Ti ron 削弱了75- 1对上述指标的诱导作用,导致75-1对余水糯和浙福 802 的互作由非亲和性类型转变为类似亲和性性类型.提示 O^{- .}₂ 等活性氧介导的脂膜过氧化损伤及防御酶系统的活性变化与水稻幼苗对稻白叶枯病的系统性抗性有关.

关键词： 稻白叶枯菌, 系统抗性, 防御酶, 活性氧, 水稻

Abstract: Seedlings of two rice cultivars, Yushuinuo and Zhefu 802, acquired systemic resistance to Xanthomonas oryzae pv. oryzae( XOO) strain 76- 25 with high virulence when induced by XOO 75- 1 strain with weak virulendce.Activities of superoxide dismutase( SOD) , catalase( CAT) decreased in leaves pre-treated with XOO 75-1, However,lipoxygenase( LOX) activity and malondialdehyde(MDA) content increased after treatment. Tiron( 4, 5-dihydroxy1-1, 3- bezene- disulfonic acid) , which can specially react with O^{- .}₂ ,weakened induction effect on the items mentioned above by XOO 75- 1. It was also found that the incompatible interaction type between 75-1 strain and the two cultivars turned into something like compatible interacton. It suggested that membrane lipid peroxidation damage mediated by active oxygens like O^{- .}₂ and changes of defense enzyme activities were related to systemic acquired resistance to XOO in rice seedlings.

Key words: Xangthomonas oryzae pv. oryzae, systemic resistance, defense enzyme, active oxygen, rice

曹赐生, 王海华. 稻白叶枯菌弱毒株诱导的系统抗性——兼论与防御酶活性的变化[J]. journal6, 2000, 21(2): 58-62.

CAO Ci-Sheng, WANG Hai-Hua. Rice Systemic Resistance Induced by Xanthomonas oryzae pv. oryzae Strain With Weak Virulence——And Changes of Defense Enzyme Activities[J]. journal6, 2000, 21(2): 58-62.

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