Department of Plant Pathology, The Ohio State University, Columbus, OH, 43210, USA.
Department of Horticulture, University of Kentucky, Lexington, KY, 40546, USA.
Sci Rep. 2019 Feb 8;9(1):1669. doi: 10.1038/s41598-018-38230-x.
As compared to organic farming system, conventional farming system relies on higher inputs of synthetic agrochemicals, which may reduce the abundance, diversity, and beneficial effects of plant endophytic fungal communities. This study compares the diversity and abundance of culturable endophytic fungal communities associated with four plant species -corn, tomato, pepper, and watermelon grown in separate organic and conventional fields. In all, 740 fungal isolates were identified, of which 550 were from the organic fields and 190 from the conventional ones. These fungal isolates were grouped into eight orders and 22 species, with the two most abundant species being Trichoderma sp. and Pichia guilliermondi. The fungal species diversity and abundance were both significantly higher in the organic than in the conventional fields. All the isolated endophytic fungi improved tomato plants' shoot growth and biomass significantly, as compared with the water control. Six fungal isolates also exhibited activity that enhanced tomato fruit yields. These results suggest that these endophytic fungi might be a considerable boost to sustainable agricultural production, while also reducing the agricultural application of chemicals and thus benefiting the environment and human health.
与有机农业系统相比，传统农业系统依赖于更高剂量的合成农用化学品，这可能会降低植物内生真菌群落的丰度、多样性和有益效果。本研究比较了在单独的有机和常规田地中生长的四种植物（玉米、番茄、辣椒和西瓜）相关的可培养内生真菌群落的多样性和丰度。总共鉴定出 740 株真菌分离株，其中 550 株来自有机田地，190 株来自常规田地。这些真菌分离株被分为八个目和 22 个种，其中两个最丰富的种是木霉属（Trichoderma sp.）和毕赤酵母属（Pichia guilliermondi）。有机田地的真菌物种多样性和丰度均明显高于常规田地。与水对照相比，所有分离的内生真菌均显著促进了番茄植株的茎生长和生物量。六种真菌分离株还表现出增强番茄果实产量的活性。这些结果表明，这些内生真菌可能会极大地促进可持续农业生产，同时减少农业化学品的应用，从而有益于环境和人类健康。
