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Volatile Chemical Cues Guide Host Location and Host Selection by Parasitic Plants
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Volatile Chemical Cues Guide Host Location and Host Selection by Parasitic Plants
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Journal Article
Volatile Chemical Cues Guide Host Location and Host Selection by Parasitic Plants
2006
Overview
The importance of plant volatiles in mediating interactions between plant species is much debated. Here, we demonstrate that the parasitic plant Cuscuta pentagona (dodder) uses volatile cues for host location. Cuscuta pentagona seedlings exhibit directed growth toward nearby tomato plants (Lycopersicon esculentum) and toward extracted tomato-plant volatiles presented in the absence of other cues. Impatiens (Impatiens wallerana) and wheat plants (Triticum aestivum) also elicit directed growth. Moreover, seedlings can distinguish tomato and wheat volatiles and preferentially grow toward the former. Several individual compounds from tomato and wheat elicit directed growth by C. pentagona, whereas one compound from wheat is repellent. These findings provide compelling evidence that volatiles mediate important ecological interactions among plant species.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Animal, plant and microbial ecology
/ Biological and medical sciences
/ Botany
/ Cues
/ Cuscuta - growth & development
/ Foraging
/ Fundamental and applied biological sciences. Psychology
/ hosts
/ Lycopersicon esculentum - metabolism
/ Lycopersicon esculentum - parasitology
/ Plant physiology and development
/ planting
/ Plants
/ Rubber
/ Seedlings - growth & development
/ Solanum lycopersicum var. lycopersicum
/ Tomatoes
/ Tropism
/ Weeds
/ Wheat
