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首页> 外文期刊>Sugar Tech >Antifungal Potential of Metabolites from Trichoderma sp Against Colletotrichum falcatum Went Causing Red Rot of Sugarcane
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Antifungal Potential of Metabolites from Trichoderma sp Against Colletotrichum falcatum Went Causing Red Rot of Sugarcane

机译：木霉菌代谢产物对甘蔗炭疽病的抗真菌潜力导致甘蔗红腐病

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摘要

Secondary metabolites produced by the biocontrol fungi Trichoderma have been frequently implicated in the inhibition of diverse plant pathogens in several crops. We carried out laboratory and field studies to assess the antifungal potential of soluble inhibitory metabolites produced by Trichoderma against red rot of sugarcane caused by Colletotrichum falcatum. A total of 33 Trichoderma isolates were selected and assessed for production of soluble inhibitory metabolites against C. falcatum in vitro. Malt extract broth (MEB), potato dextrose broth (PDB) and minimal salts broth were evaluated as growth medium for production of inhibitory metabolites. For most isolates, the highest inhibitory activity was observed with metabolites produced on MEB and lowest when produced on PDB, indicating the importance of growth medium in inhibitory metabolite production. Considerable variability (ranging from 0.7 to 70.6 %) was observed in the inhibitory activity of soluble metabolites of the 33 isolates against C. falcatum with only five isolates showing > 40 % inhibition in C. falcatum growth. Field experiments were carried out in two years to evaluate potential of Trichoderma metabolites for management of red rot. Sugarcane setts, pre-inoculated with C. falcatum, were treated with Trichoderma metabolites and planted. Observations on germination failure, settling, tiller and cane mortality due to red rot were recorded regularly. The metabolites of isolates STr-108 and STr-12 showed considerable reduction in red rot incidence (40-55 % reduction over control) in both years. The results indicate that direct application of these metabolites and/or development and application of biopesticides based on them has the potential to provide consistent and effective disease control.
机译：生物防治真菌木霉产生的次生代谢产物经常与几种作物中多种植物病原体的抑制有关。我们进行了实验室和田间研究，以评估木霉产生的可溶性抑制性代谢产物对由炭疽菌引起的甘蔗红腐病的抗真菌潜力。总共选择了33种木霉菌分离株，并评估了其对体外念珠菌的可溶性抑制性代谢产物的产生。麦芽提取物肉汤（MEB），马铃薯右旋糖肉汤（PDB）和微量盐肉汤被评估为生产抑制性代谢产物的培养基。对于大多数分离株，在MEB上观察到的代谢产物具有最高的抑制活性，而在PDB上观察到的则具有最低的抑制活性，这表明生长培养基在抑制代谢产物产生中的重要性。在33种分离物的可溶性代谢产物对棒状线虫的抑制活性中观察到相当大的变异性（从0.7％到70.6％），只有五个分离物显示了对棒状线虫生长的抑制> 40％。在两年内进行了田间试验，以评估木霉代谢物在控制红腐病方面的潜力。用木霉属代谢产物处理预先接种了棒状线虫的甘蔗定植苗并种植。定期记录因红腐而导致的发芽失败，沉降，分和甘蔗死亡率的观察。分离株STr-108和STr-12的代谢产物在这两年中均显示出红腐发生率的显着降低（比对照降低40-55％）。结果表明，这些代谢物的直接应用和/或基于它们的生物农药的开发和应用具有提供一致且有效的疾病控制的潜力。

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  • 来源
    《Sugar Tech》 |2016年第5期|529-536|共8页
  • 作者

    Joshi Deeksha; Singh Pushpa; Singh A. K.; Lal R. J.; Tripathi Nidhi;

  • 作者单位

    Indian Inst Sugarcane Res, Div Crop Protect, Lucknow 226002, Uttar Pradesh, India;

    Indian Inst Sugarcane Res, Div Crop Protect, Lucknow 226002, Uttar Pradesh, India;

    Indian Inst Sugarcane Res, Div Crop Protect, Lucknow 226002, Uttar Pradesh, India;

    Indian Inst Sugarcane Res, Div Crop Protect, Lucknow 226002, Uttar Pradesh, India;

    Indian Inst Sugarcane Res, Div Plant Physiol & Biochem, Lucknow 226002, Uttar Pradesh, India;

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  • 正文语种 eng
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  • 关键词

    Trichoderma; Secondary metabolites; Antibiosis; Red rot; Sugarcane;

    机译：木霉;次生代谢产物;抗菌;红腐病;甘蔗;

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