ESTIMATING COSTS AND BENEFITS OF THE PYRROLIZIDINE ALKALOIDS OF SENECIO-JACOBAEA UNDER NATURAL CONDITIONS

被引：26

作者：

VRIELING, K

VANWIJK, CAM

机构：

来源：

OIKOS | 1994年 / 70卷 / 03期

关键词：

D O I：

10.2307/3545785

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

We estimated costs and benefits of pyrrolizidine alkaloids (Pa's) in a field experiment with eight clones of genotypes of Senecio jacobaea. Costs associated with Pa's could not be detected: no trade-offs between growth, percentage flowering and number of flowerheads and Pa's were found. Herbivory of the specialist flea beetle Longitarsus jacobaeae was lower in genotypes with high Pa concentrations. Both herbivory by adults and larvae were negatively correlated with Pa concentration. Differential attack of genotypes of S. jacobaea with high and low Pa concentrations by L. jacobaeae did not result in fitness differences between genotypes.

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页码：449 / 454

页数：6

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