Biotic and heavy metal stress response in plants: evidence for common signals

FEBS Letters - Tập 566 - Trang 1-5 - 2004
Axel Mithöfer1, Birgit Schulze1, Wilhelm Boland1
1Max-Planck-Institut für Chemische Ökologie, Bioorganische Chemie, Beutenberg Campus, Hans-Knöll-Str. 8, D-07745 Jena, Germany

Tóm tắt

In higher plants, biotic stress (e.g., herbivore or pathogen attack) as well as abiotic stress (in particular heavy metals) often induce the synthesis and accumulation of the same defense‐related secondary metabolites. This well‐known finding still awaits an explanation regarding the common features of both stress types. In this study, a mechanism is proposed that links reactive oxygen species (ROS) generation with lipid oxidation processes, ultimately resulting in the formation of similar, highly active signalling compounds. The generation of ROS is a common event in both heavy metal treatment and biotic stress although it can depend on quite different, enzymatic and non‐enzymatic reactions. Regardless, ROS are involved in the oxidation of unsaturated fatty acids which initiate the formation of oxylipins, a highly variable class of lipid‐derived compounds in plants. Oxylipins represent new endogenous signals involved in biotic‐ and abiotic‐induced stress responses.

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FEBS Letters

Tập 566

1-5

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