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Annu Rev Plant Biol. 2006;57:649-74.

Peptide hormones in plants.

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Graduate School of Bio-Agricultural Sciences, Nagoya University Chikusa, Nagoya 464-8601 Japan.


In recent years, numerous biochemical and genetic studies have demonstrated that peptide signaling plays a greater than anticipated role in various aspects of plant growth and development. A substantial proportion of these peptides are secretory and act as local signals mediating cell-to-cell communication. Specific receptors for several peptides were identified as being membrane-localized receptor kinases, the largest family of receptor-like molecules in plants. These findings illustrate the importance of peptide signaling in the regulation of plant growth, functions that were previously ascribed to the combined action of small lipophilic compounds referred to as "traditional plant hormones." Here, we outline recent advances in the current understanding of biologically active peptides in plants, currently regarded as a new class of plant hormones.

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