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首页> 外文期刊>Biocontrol Science >Biological Control of Xanthomonas Oryzae pv. Oryzae Causing Rice Bacterial Blight Disease by Streptomyces toxytricini VN08-A-12, Isolated from Soil and Leaf-litter Samples in Vietnam
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Biological Control of Xanthomonas Oryzae pv. Oryzae Causing Rice Bacterial Blight Disease by Streptomyces toxytricini VN08-A-12, Isolated from Soil and Leaf-litter Samples in Vietnam

机译：Xanthomonas Oryzae pv的生物防治。从越南土壤和凋落物样本中分离出来的稻瘟病菌VN08-A-12引起水稻白叶枯病的稻米

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A total of 2690 actinomycete strains were screened as potential biological control agents in controlling rice bacterial blight (BB) in Vietnam. From these microorganisms, seventeen actinomycete strains were found to be capable of inhibiting all 10 major Xoo races isolated from Xoo-infected rice leaves. One strain, namely VN08-A-12, contained effective characteristics in selectively inhibiting all 10 Xoo races in vitro, but did not inhibit most of the other tested microorganisms. Therefore, VN08-A-12 was subsequently selected for rice field trials for two seasons on two rice cultivars SS1 and KD18. Results showed VN08-A-12 was not only able to reduce Xoo lesion lengths in the two rice cultivars (lesion length reduction of up to 38.3 %), but it also significantly reduced Xoo-related yield loss in infected rice cultivars from the field (yield loss reduction of up to 43.2 %). Interestingly, the culture of this strain also increased the rice yield in healthy rice cultivars (from 2.66 % to 16.98 % for SS1 and from 3.11 % to 5.94 % for KD18 cultivar). The strain VN08-A-12 was shown to be identical to Streptomyces toxytricini. To our knowledge, this is the first study reporting S. toxytricini as a beneficial biological agent for the control of BB in rice.
机译：总共筛选了2690株放线菌菌株作为控制越南稻瘟病的潜在生物防治剂。从这些微生物中，发现十七种放线菌菌株能够抑制从Xoo感染的稻叶中分离的所有10个主要Xoo小种。一种菌株，即VN08-A-12，具有在体外选择性抑制所有10个Xoo族的有效特性，但没有抑制大多数其他测试微生物。因此，随后选择VN08-A-12在两个水稻品种SS1和KD18上进行了两个季节的水稻田间试验。结果表明，VN08-A-12不仅能够减少两个水稻品种的Xoo病害长度（病灶长度减少高达38.3％），而且还显着减少了田间受感染水稻品种Xoo相关的产量损失（产量损失减少高达43.2％）。有趣的是，该菌株的培养还提高了健康水稻品种的水稻产量（SS1从2.66％增加到16.98％，KD18品种从3.11％增加到5.94％）。显示菌株VN08-A-12与毒链霉菌相同。据我们所知，这是首次报道毒链霉菌是控制水稻中BB的有益生物制剂的研究。

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