香脂杨中的一种拒食剂可抑制雪靴兔的啃食。

An antifeedant in balsam poplar inhibits browsing by snowshoe hares.

作者信息

Jogia Madhu K, Sinclair A R E, Andersen Raymond J

机构信息

Department of Chemistry and Oceanography University of British Columbia, V6T 1Y6, Vancouver, Canada.

The Ecology Group, Department of Zoology, University of British Columbia, V6T 2A9, Vancouver, Canada.

出版信息

Oecologia. 1989 May;79(2):189-192. doi: 10.1007/BF00388477.

DOI:10.1007/BF00388477

PMID:28312854

Abstract

The 'plant defense guild' hypothesis for the evolution of plant secondary chemicals predicts that plant species defend themselves against generalist herbivores such as the snowshoe hare (Lepus americanus) in the Canadian boreal forest by evolving unique antifeedant chemicals. Plant species may coevolve in an ecosystem by presenting an array of chemicals to herbivores. We report further evidence for this idea from the presence of 2,4,6-trihydroxydihydrochalcone in the CHCl extracts of Populus balsamifera juvenile twigs. These extracts, added to rabbit chow, were offered to hares in choice tests. The bioassay established that the chemical acted as an antifeedant for hares.

摘要

关于植物次生化学物质进化的“植物防御群落”假说预测，植物物种通过进化出独特的拒食化学物质来抵御加拿大北方森林中的广食性食草动物，如雪兔（美洲兔）。植物物种可能通过向食草动物呈现一系列化学物质而在生态系统中共同进化。我们从香脂杨嫩枝的CHCl提取物中存在2,4,6 - 三羟基二氢查耳酮这一现象中找到了这一观点的进一步证据。在选择试验中，将这些提取物添加到兔饲料中喂给雪兔。生物测定表明，这种化学物质对雪兔起到了拒食作用。