当前位置： SCI文献检索 > JOURNAL OF CHEMICAL ECOLOGY期刊下所有文献 > Intraspecific variation in plant defense alters effects of root herbivores on leaf chemistry and aboveground herbivore damage.

Intraspecific variation in plant defense alters effects of root herbivores on leaf chemistry and aboveground herbivore damage.

Abstract：

:Root herbivores can indirectly affect aboveground herbivores by altering the food quality of the plant. However, it is largely unknown whether plant genotypes differ in their response to root herbivores, leading to variable defensive phenotypes. In this study, we investigated whether root-feeding insect larvae (Agriotes sp. larvae, wireworms) induce different responses in Plantago lanceolata plants from lines selected for low and high levels of iridoid glycosides (IG). In the absence of wireworms, plants of the "high-IG line" contained approximately twofold higher levels of total IG and threefold higher levels of catalpol (one of the IG) in leaves than plants from the "low-IG line," whereas both lines had similar levels of IG in roots. In response to wireworms, roots of plants from both lines showed increased concentrations of catalpol. Leaves of "low-IG line" plants increased catalpol concentrations in response to wireworms, whereas catalpol concentrations of leaves of "high-IG line" plants decreased. In contrast, glucose concentrations in roots of "low-IG" plants decreased, while they increased in "high-IG" plants after feeding by wireworms. The leaf volatile profile differed between the lines, but was not affected by root herbivores. In the field, leaf damage by herbivores was higher in wireworm-induced compared to noninduced "low-IG" plants and lower in wireworm-induced compared to noninduced "high-IG" plants, despite induction of catalpol in leaves of the "low-IG" plants and reduction in "high-IG" plants. This pattern might arise if damage is caused mainly by specialist herbivores for which catalpol may act as feeding stimulant rather than as deterrent. The present study documents for the first time that intraspecific variation in plant defense affects the outcome of plant-mediated interactions between root and shoot herbivores.

journal_name

J Chem Ecol

journal_title

Journal of chemical ecology

authors

Wurst S,Van Dam NM,Monroy F,Biere A,Van der Putten WH

doi

10.1007/s10886-008-9537-9

subject

Has Abstract

pub_date

2008-10-01 00:00:00

pages

1360-7

issue

eissn

0098-0331

issn

1573-1561

journal_volume

pub_type

杂志文章

在线工具

Intraspecific variation in plant defense alters effects of root herbivores on leaf chemistry and aboveground herbivore damage.