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选用5个非亲和性和2个亲和性的稻白叶枯菌菌株、15种化学诱导物、9个水稻品种进行了水稻白叶枯病诱导抗性的研究.非亲和性菌株75-1,75-1-49和78-3对亲和性菌株76-25-17有较好的抗性诱导效果.在8个不同品种分蘖期用75-1接种5d 以后再以76-25-17接种,对后者的局部抗性和系统抗性诱导效果之间均存在显著差异,仅密阳46和74-105有较明显的系统抗性相对诱导效果,分别为21.51%和17.93%,而所有品种都有很好的局部抗性相对诱导效果,除杭18为24.98%外,其余7个品种均在43.06%～56.03%之间.金刚30和窄叶青8号,经75-1和78-3诱导接种的叶片以及诱导接种后再经76-25-17挑战接种的叶片提取液对76-25-17均有明显的抑制作用.15种化学诱导物中以补骨脂、重楼、刺五加及麻黄的相对抗性诱导效果最好,分别为20.62%,16.28%,15.56%和15.05%.这4种中药均有不同程度的抑菌作用,但其抑菌能力与抗性诱导效果之间无相关性.
Five non-affinity and two affinity strains of rice leaf blight, 15 chemical inducers and 9 rice cultivars were selected to study the resistance to bacterial leaf blight in rice.Non-affinity strains 75 -1,75-1-49 and 78-3 had better resistance induction to the strain 76-25-17.When 75-1 was inoculated for 5 days in 8 different tillering stages, -17 inoculation, there was a significant difference between the local resistance and the systemic resistance induction effect of the latter. Only Moyang 46 and 74-105 had relatively obvious relative induction of systemic resistance, which were respectively 21.51% and 17.93% , While all the cultivars had a good relative induction effect of local resistance, with the exception of Hangzhou 18 being 24.98%, and the remaining 7 varieties were between 43.06% ~ 56.03% 1 and 78-3 induced inoculation leaves and inoculation after inoculation 76-25-17 challenge leaf extract significantly inhibited the 76-25-17 of 15 kinds of chemical inducers in psoralen, The relative inducing effects of Rehmannia glutinosa, Acanthopanax senticosus and Ephedra are 20.62%, 16.28%, 15.56% and 15.05%, respectively.The antibacterial activities of these four kinds of traditional Chinese medicines have different degree of antibacterial activity, Resistance induced effect No correlation between.