ISOLATION OF FEEDING DETERRENTS AGAINST ARGENTINE STEM WEEVIL FROM RYEGRASS INFECTED WITH THE ENDOPHYTE ACREMONIUM-LOLIAE
ISOLATION OF FEEDING DETERRENTS AGAINST ARGENTINE STEM WEEVIL FROM RYEGRASS INFECTED WITH THE ENDOPHYTE ACREMONIUM-LOLIAE
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DOI：
10.1007/bf01012099
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发表时间：
1986-03-01
影响因子：
2.3
通讯作者：
GAYNOR, DL
中科院分区：
文献类型：
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作者：
ROWAN, DD;GAYNOR, DL
内生真菌（Acremium loliae）感染黑麦草（Loium perenne）可赋予其对阿根廷茎象甲虫（Listronotus bonariensis）的抗性。在取食选择生物测定中对感染和未感染黑麦草克隆的提取物进行了比较，并鉴定了几个影响茎象甲取食行为的组分。一种茎象甲取食威慑剂 Peramine C12H17N5O 已从受感染的黑麦草中分离出来，部分特征为碱性吲哚衍生物。培养的罗丽叶提取物对茎象甲的摄食行为没有影响，在所检查的真菌培养物中也没有检测到波胺。波拉明和其他活性物质是亲水性的，这与报道的神经毒性黑麦草的亲脂性特性相反，黑黑麦草也是从感染黑麦草的黑麦草中分离出来的，并且与导致家畜黑麦草交错障碍有关。这表明黑麦草的交错和茎象甲的取食威慑可能是通过不同的生化机制产生的。
Infection of ryegrass (Loium perenne) by an endophytic fungus (Acremonium loliae) confers resistance against the Argentine stem weevil (Listronotus bonariensis). Extracts from ryegrass clones, infected and uninfected with A. loliae, were compared in a feeding choice bioassay, and several fractions were identified which affected stem weevil feeding behavior. One stem weevil feeding deterrent, peramine C12H17N5O, has been isolated from infected ryegrass and partially characterized as a basic indole derivative. Extracts from cultured A. loliae had no effect on stem weevil feeding behavior nor was peramine detected in the fungal cultures examined. Peramine and the other active substances are hydrophilic in contrast to the lipophilic properties reported for the neurotoxic lolitrems also isolated from ryegrass infected with A. loliae and associated with causing ryegrass staggers disorder in livestock. It is suggested that ryegrass staggers and stem weevil feeding deterrency may arise by different biochemical mechanisms.