Defoliation of alders (Alnus glutinosa) affects herbivory by leaf beetles on undamaged neighbours
Defoliation of alders (Alnus glutinosa) affects herbivory by leaf beetles on undamaged neighbours
复制标题
DOI：
10.1007/s004420000482
复制
发表时间：
2000-12-01
期刊：
影响因子：
2.7
通讯作者：
Tscharntke, T
中科院分区：
文献类型：
--
作者：
Dolch, R;Tscharntke, T
在北方德国的10个桤木林分中研究了桤木落叶对桤木叶甲取食的影响。在每个站点，一棵树被手动落叶（c。总叶的20%）以模拟食草动物。A的后续损害。从1994年5月到9月，在6个不同的日期对每个地点的10棵桤木进行了评估。食草动物在落叶后，由A. AlNi随离落叶树的距离增加而增加。实验室实验支持现场结果。不仅在现场的叶损害，而且在实验室的取食偏好测试和产卵的数量每叶在另一个实验室测试的叶消费的程度呈正相关，与距离落叶树。因此，不仅在落叶的桤木中诱导抗性，而且在它们未受损害的邻居中也诱导抗性。因此，桤木的落叶可能会引发株间抗性转移，从而减少整个桤木林分中的植食动物。
The effects of defoliation of alder (Alnus glutinosa) on subsequent herbivory by alder leaf beetle (Agelastica alni) were studied in ten alder stands in northern Germany. At each site, one tree was manually defoliated (c. 20% of total foliage) to simulate herbivory. Subsequent damage by A. alni was assessed on ten alders at each site on six different dates from May to September 1994. After defoliation, herbivory by A. alni increased with distance from the defoliated tree. Laboratory experiments supported the field results. Not only leaf damage in the field, but also the extent of leaf consumption in laboratory feeding-preference tests and the number of eggs oviposited per leaf in another laboratory test were positively correlated with distance from the defoliated tree. Resistance was therefore induced not only in defoliated alders, but also in their undamaged neighbours. Consequently, defoliation of alders may trigger interplant resistance transfer, and therefore reduce herbivory in whole alder stands.