Evidences of biological control capacities of Streptomyces spp. against Sclerotium rolfsii responsible for damping-off disease in sugar beet (Beta vulgaris L.)
Evidences of biological control capacities of Streptomyces spp. against Sclerotium rolfsii responsible for damping-off disease in sugar beet (Beta vulgaris L.)
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DOI：
10.1007/s11274-007-9394-7
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发表时间：
2007-11-01
影响因子：
4.1
通讯作者：
Barakate, Mustapha
中科院分区：
文献类型：
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作者：
Errakhi, Rafik;Bouteau, Francois;Barakate, Mustapha
研究了从摩洛哥土壤中分离的10种产抗生素链霉菌对罗尔夫菌核菌体外发育的抑制能力。随后测试了四株具有最大病原体抑制能力的菌株在无菌土壤中抑制菌核萌发的能力。本试验采用菌体生物量接种液、培养滤液和孢子悬浮液处理。生物量接种和培养滤液处理对菌核的抑制作用最大。对甜菜菌核病的生物防治试验表明，所选链霉菌菌株显著降低了甜菜菌核病的严重程度，其中J-2菌株的防效更强。此外，用分离物J-2处理可显著提高(P
Ten antibiotic-producing Streptomyces spp. isolated from Moroccan soils were evaluated for their ability to inhibit in vitro Sclerotium rolfsii development. Four isolates having the greatest pathogen inhibitory capabilities were subsequently tested for their ability to inhibit sclerotial germination in sterile soil. This test was carried out by using biomass inoculum, culture filtrate, and spore suspension of the isolates as treatment. Treatment with biomass inoculum and culture filtrate gave the highest inhibition of sclerotia. Biological control tests against Sclerotium rolfsii damping-off of sugar beet seeds showed that the selected Streptomyces isolates reduced significantly the disease severity, the J-2 isolate being the more potent. In addition, treatment with the isolate J-2 resulted in a significant increase (P