从棉芽和花药中鉴定棉铃象鼻虫的取食刺激物。

Identification of feeding stimulants for boll weevils from cotton buds and anthers.

机构信息

Boll Weevil Research Lab., Agricultural Research Service USDA, P.O. Box 5367, 39762, Mississippi State, Mississippi.

出版信息

J Chem Ecol. 1985 Sep;11(9):1229-38. doi: 10.1007/BF01024111.

Abstract

Column chromatography of the pentane extract of freeze-dried cotton buds or anthers yielded a wax-sterol ester fraction that exhibited potent feeding stimulant activity for the cotton boll weevil. The waxes of the wax-sterol ester mixture were responsible for the feeding activity. Saponification of the wax-sterol ester fraction yielded about 15% alcohols and 85% sterols. A C18∶1 alcohol, dihydrophytol, phytol, and geranylgeraniol constituted 15, 36, 26, and 23%, respectively, of the total alcohols, implicating certain of their long-chain esters as feeding stimulants. Several esters of dihydrophytol, phytol, and geranylgeraniol were identified among the waxes by GC-MS. Certain phytol, geranylgeraniol, and oleyl alcohol esters containing C12 to C26 acid moieties were synthesized and were found to induce high feeding stimulant activity in the cotton boll weevil.

摘要

柱层析法分离冻干棉铃或花药的戊烷提取物，得到一种蜡质-甾醇酯馏分，对棉铃象鼻虫具有强烈的取食刺激活性。蜡质-甾醇酯混合物中的蜡质是取食活性的原因。蜡质-甾醇酯馏分的皂化得到约 15%的醇和 85%的甾醇。C18∶1 醇、二氢植醇、植醇和香叶基香叶醇分别占总醇的 15%、36%、26%和 23%，表明它们的某些长链酯类是取食刺激物。通过 GC-MS 在蜡质中鉴定出几种二氢植醇、植醇和香叶基香叶醇的酯类。合成了含有 C12 至 C26 酸部分的某些植醇、香叶基香叶醇和油醇酯类，并发现它们对棉铃象鼻虫具有很高的取食刺激活性。