Related Experiment Videos
Herbivore-induced, indirect plant defences
Gen-ichiro Arimura1, Christian Kost, Wilhelm Boland
1Max Planck Institute for Chemical Ecology, Department of Bioorganic Chemistry, Hans-Knöll-Strasse 8, D-07745 Jena, Germany.
Biochimica Et Biophysica Acta
|May 21, 2005
Summary
Plants use indirect defenses, like producing volatiles and extrafloral nectar, to attract natural enemies of herbivores. This complex signaling involves elicitors, early signals, and cross-talks, impacting plant-insect interactions.
Area of Science:
- Plant Biology
- Ecology
- Biochemistry
Background:
- Plants employ indirect defensive strategies to attract natural enemies of herbivores, acting as plant defenders.
- These defenses can be constitutive or induced by herbivore attack, involving mechanical damage and specific elicitors.
- Induced indirect defenses include de novo volatile production and extrafloral nectar secretion, mediating interactions with higher trophic levels.
Purpose of the Study:
- To provide an overview of induced indirect plant defenses, focusing on volatile production and extrafloral nectar secretion.
- To discuss the molecular and genetic regulation of these defenses, including elicitors, signaling pathways, and cross-talks.
- To review the ecological aspects, such as variability, specificity, evolution, and relevance of these plant defenses.
Main Methods:
- Literature review and synthesis of current research on plant indirect defenses.
- Analysis of molecular and genetic mechanisms underlying the biosynthesis of herbivore-induced plant volatiles.
- Discussion of ecological factors influencing the effectiveness and evolution of plant indirect defenses.
Main Results:
- Induced indirect defenses are regulated by complex signaling pathways involving elicitors and cross-talks, leading to volatile and nectar production.
- Herbivore-induced plant volatiles include terpenoids, aromatic compounds, and fatty acid metabolites, acting as infochemicals and potentially inducing defense genes in neighbors.
- These defenses exhibit variability and specificity, with significant ecological relevance in natural ecosystems.
Conclusions:
- Indirect plant defenses are sophisticated strategies involving intricate signaling networks.
- Understanding the molecular and ecological aspects of these defenses is crucial for comprehending plant-herbivore interactions.
- Further research into the evolutionary and ecological significance of plant indirect defenses can offer insights into sustainable agriculture and pest management.