Yucca schidigera extract: a potential biofungicide against seedborne pathogens of sorghum
Yucca schidigera extract: a potential biofungicide against seedborne pathogens of sorghum
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DOI：
10.1111/j.1365-3059.2011.02517.x
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发表时间：
2012-04
期刊：
影响因子：
2.7
通讯作者：
E. Wulff;E. P. Zida;J. Torp;O. Lund
中科院分区：
文献类型：
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作者：
E. Wulff;E. P. Zida;J. Torp;O. Lund
用丝兰（YE）水提物处理高粱种子，研究其对种传病原菌的抗真菌活性及其对高粱种子萌发和幼苗生长的影响。以甘蔗细球腔菌（Leptosphaeria sacchari，syn.高粱茎点霉），当提取物以2.5%和10%浓度施用时。在10%浓度下，YE不仅显著降低了L.甘蔗，还有镰刀菌属，Cochliobolus lunatus（syn.弯孢属（Curvularia lunata）和枝孢属（Cladosporium spp.）10%YE对种传真菌的影响比杀菌剂咯菌腈更广泛，特别是对镰刀菌。此外，正常的，健康的幼苗的数量增加了剂量反应的方式与YE治疗。幼苗活力也受到YE的刺激，但没有观察到与测试浓度的相关性。在温室条件下，与阴性对照和皂苷相比，用10%YE处理种子增加了幼苗的出苗和植物高度，并减少了冠腐病幼苗的数量。这种积极的效果与用杀真菌剂处理过的种子获得的效果相似。与用YE处理的种子相比，用合成皂苷处理的种子抑制种传真菌的效果较差，并且也对幼苗的萌发和活力产生负面影响。结果表明，YE作为生物杀真菌剂用于高粱种子处理的农学潜力。YE的抗真菌和活力刺激作用之间的差异值得进一步研究。
Treatment of seeds with an aqueous extract of yucca (YE), Yucca schidigera, was evaluated for antifungal activity against seedborne pathogens as well as its effect on seed germination and seedling growth of sorghum (Sorghum bicolor). The antifungal effect of YE was observed against Leptosphaeria sacchari (syn. Phoma sorghina) when the extract was applied at 2·5 and 10% concentrations. At 10% concentration, YE significantly reduced not only the incidence of L. sacchari, but also that of Fusarium spp., Cochliobolus lunatus (syn. Curvularia lunata) and Cladosporium spp. The effect of 10% YE on seedborne fungi was broader than the fungicide fludioxonil, particularly with regard to Fusarium. Furthermore, the number of normal, healthy-looking seedlings increased in a dose-responsive manner with YE treatment. Seedling vigour was also stimulated by YE but no correlation was observed with the concentrations tested. Under glasshouse conditions, the treatment of seeds with 10% YE increased the emergence of seedlings and plant height and reduced the number of seedlings with crown rot compared to negative controls and saponin. The positive effect was similar to the effect obtained with fungicide-treated seeds. Treatment of seeds with synthetic saponin inhibited seedborne fungi less effectively and also negatively affected germination and vigour of the seedlings, compared to the treatment with YE. The results demonstrate an agronomic potential for the use of YE as a biofungicide for seed treatment of sorghum. The difference between the antifungal and the vigour-stimulating effects of YE warrants further investigation.