ACQUIRED CHEMICAL DEFENSES IN GRASSES - THE ROLE OF FUNGAL ENDOPHYTES
ACQUIRED CHEMICAL DEFENSES IN GRASSES - THE ROLE OF FUNGAL ENDOPHYTES
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DOI：
10.2307/3565204
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发表时间：
1988-06-01
期刊：
影响因子：
3.4
通讯作者：
CLAY, K
中科院分区：
文献类型：
--
作者：
CHEPLICK, GP;CLAY, K
植物的微生物共生体可以影响寄主与食草动物之间的相互作用。系统性内生真菌（棒孢菌科，子囊菌纲）感染禾本科植物并在宿主组织中产生生物碱。本研究的目的是确定这些真菌感染的各种草叶和种子喂养昆虫的影响。生存，生长和发育的秋粘虫（草地贪夜蛾）感染或未感染的植物饲养进行了比较。幼虫饲养感染的植物往往表现出减少的生存和生长发育迟缓的幼虫饲养在未感染的植物。有相当大的变化，这些变量之间的主机草和不同的试验之间使用相同的草生长在不同的环境。同时比较了赤拟谷盗在感染和未感染的多年生黑麦草和高羊茅种子上的种群增长。平均甲虫人口增长率显着降低感染种子，特别是高羊茅。我们的结论是，抗虫性是内生菌感染的草的一般属性，感染可能是有益的宿主植物在自然界中。
Microbial symbionts of plants can affect the interaction between their hosts and herbivores. Systemic fungal endophytes (Clavicipitaceae, Ascomycetes) infect grasses and produce alkaloids in host tissues. The objectives of this study were to determine the effects of these fungi infecting a variety of grasses on leaf and seed-feeding insects. Survival, growth, and development of fall armyworm (Spodoptera frugiperda) reared on infected or noninfected plants were compared. Larvae reared on infected plants tended to exhibit reduced survival and growth and retarded development compared with larvae reared on noninfected plants. There was considerable variation in these variables among host grasses and between different trials using the same grass grown in different environments. Population growth of flour beetles (Tribolium castaneum) on ground seeds from infected or noninfected perennial ryegrass (Lolium perenne) and tall fescue (Festuca arundinacea) were also compared. Mean beetle population growth rates were significantly lower on infected seeds and especially on tall fescue. We conclude that insect resistance is a general property of endophyte-infected grasses and that infection may be beneficial to host plants in nature.