Meyer Susan L F, Patchett Brian J, Gillanders Timothy J, Kantor Mihail R, Timper Patricia, MacDonald Margaret H
USDA ARS Mycology and Nematology Genetic Diversity and Biology Laboratory , Northeast Area , Henry A. Wallace Beltsville Agricultural Research Center (BARC)-West , Beltsville, MD, 20705.
Cropmark Seeds Ltd , 49 Manion Road , RD7 Christchurch, 7677 , New Zealand.
J Nematol. 2020;52:1-16. doi: 10.21307/jofnem-2020-076.
hybrids are forage grasses used worldwide in temperate climates. They are associated with the fungal endophyte , which aids in nutrient uptake, drought tolerance, and production of metabolites that protect against parasites and herbivores. produces loline alkaloids, which can deter insect pests. has not been widely studied for susceptibility to plant-parasitic nematodes, so lines, with and without fungal endophytes, were tested in the greenhouse for host status to the root-knot nematode . All were poor hosts, regardless of line or endophyte status. Pepper seedlings planted into soil following removal of the plants were infected by nematodes, likely because of surviving nematodes from the original inoculation combined with some reproduction on . Lolines were found in shoots and roots of all endophyte-associated lines, and some types of lolines in roots increased after nematode infection. Methanolic extracts from roots and shoots of a tested line did not inhibit egg hatch, but killed nearly a third of second-stage juveniles whether an endophyte was present or not. Further studies would indicate whether these lines aid in suppressing field populations of . hybrids are forage grasses used worldwide in temperate climates. They are associated with the fungal endophyte , which aids in nutrient uptake, drought tolerance, and production of metabolites that protect against parasites and herbivores. produces loline alkaloids, which can deter insect pests. has not been widely studied for susceptibility to plant-parasitic nematodes, so lines, with and without fungal endophytes, were tested in the greenhouse for host status to the root-knot nematode . All were poor hosts, regardless of line or endophyte status. Pepper seedlings planted into soil following removal of the plants were infected by nematodes, likely because of surviving nematodes from the original inoculation combined with some reproduction on . Lolines were found in shoots and roots of all endophyte-associated lines, and some types of lolines in roots increased after nematode infection. Methanolic extracts from roots and shoots of a tested line did not inhibit egg hatch, but killed nearly a third of second-stage juveniles whether an endophyte was present or not. Further studies would indicate whether these lines aid in suppressing field populations of .
杂交种是在全球温带气候地区使用的饲草。它们与真菌内生菌有关，这种内生菌有助于养分吸收、耐旱，并产生抵御寄生虫和食草动物的代谢产物。产生的洛林生物碱可以 deter 害虫。对于植物寄生线虫的易感性尚未进行广泛研究，因此在温室中对有无真菌内生菌的杂交种品系进行了根结线虫寄主状况测试。无论品系或内生菌状况如何，所有品系都是不良寄主。在移除杂交种植物后种植到土壤中的辣椒幼苗受到线虫感染，这可能是由于原始接种中存活的线虫与杂交种上的一些繁殖相结合。在所有与内生菌相关的品系的地上部分和根部都发现了洛林生物碱，并且线虫感染后根部的某些类型的洛林生物碱增加。来自一个测试杂交种品系的根和地上部分的甲醇提取物没有抑制卵孵化，但无论是否存在内生菌，都杀死了近三分之一的二龄幼虫。进一步的研究将表明这些杂交种品系是否有助于抑制田间的线虫种群。杂交种是在全球温带气候地区使用的饲草。它们与真菌内生菌有关，这种内生菌有助于养分吸收、耐旱，并产生抵御寄生虫和食草动物的代谢产物。产生的洛林生物碱可以 deter 害虫。对于植物寄生线虫的易感性尚未进行广泛研究，因此在温室中对有无真菌内生菌的杂交种品系进行了根结线虫寄主状况测试。无论品系或内生菌状况如何，所有品系都是不良寄主。在移除杂交种植物后种植到土壤中的辣椒幼苗受到线虫感染，这可能是由于原始接种中存活的线虫与杂交种上的一些繁殖相结合。在所有与内生菌相关的品系的地上部分和根部都发现了洛林生物碱，并且线虫感染后根部的某些类型的洛林生物碱增加。来自一个测试杂交种品系的根和地上部分的甲醇提取物没有抑制卵孵化，但无论是否存在内生菌，都杀死了近三分之一的二龄幼虫。进一步的研究将表明这些杂交种品系是否有助于抑制田间的线虫种群。 注：原文中“deter”未翻译完整，根据语境推测这里应该是“威慑、阻止”的意思。
