论文部分内容阅读
目前,美国农业部农业研究中心研究人员正在试验用阴沟杆菌和Burkholderia cepacia的细菌混合物保护种子免遭真菌Phythium ultimum和镰孢菌的危害。在寒冷潮湿的土壤里,真菌Phythium会侵染玉米、黄瓜、南瓜、西瓜及其它作物种子。而镰孢菌在更温暖更干燥的土壤里盛行,且通常在作物生长季节晚期阶段侵染。利用这种细菌混合物作为一种粘性膜包被作物种子,然后连同未处理种子植于带有真菌的生长箱土壤里,8天后,大部分未处理种子生长不能伸出土壤表面,而处理种子中有90%的植物仍持续正常生长。研究人员希望鉴定出产生这种状况的基因或由此出现的性状。以使细菌定殖于植物根部或保持对土壤的抗真菌活性。现他们关注的是寻求一些有意开发这种微生物作为商品杀真菌产品的私人公司。
At present, researchers at the USDA Agricultural Research Center are experimenting with a mixture of bacteria from Bacterium cloacae and Burkholderia cepacia to protect the seeds from the fungi Phythium ultimum and Fusarium. In cold, humid soils, fungal Phythium infects corn, cucumbers, pumpkins, watermelons and other crop seeds. Fusarium is endemic in warmer and drier soils and usually infects late stages of the crop season. The bacterial mixture was used as a cohesive film to coat crop seeds and then planted with soil along with fungi in untreated seedlings. After 8 days, most of the untreated seeds did not grow out of the soil surface and seeds were treated 90% of the plants continue to grow normally. Researchers hope to identify the genes that cause the condition or the traits that arise. To colonize the plant roots or maintain the antifungal activity of the soil. What they are looking for now is to seek private companies that are interested in developing such microbes as commercial fungicides.