TTPB38: Small and mighty: Peptide hormones in plant biology. Overview
Peptide hormones in plant biology
By Sonali Roy, Peter Lundquist, Michael Udvardi, and Wolf-Rüdiger Scheible
A phytohormone (plant hormone) is defined as a naturally occurring plant compound that acts as a signal molecule even at low concentrations; familar phytohormones include auxin, cytokinin etc. Interestingly, 5- to 60- amino acid long peptides also display many characteristics of hormones. In plants, peptide hormones have been found to regulate gene expression and cause changes in a variety of parameters and processes, including cell size and number, fertilization, plant responses to nutrient availability, and defense against pathogens.
This Teaching Tool covers the early discoveries of peptide hormones in animals and plants, the structure and biogenesis of peptide hormones, the roles of post-translational modifications, tools used to identify peptide hormones, the mobility and perception of peptide hormones, and some of the physiological roles of peptide hormones in plants. A summary of known peptide gene families is provided as an appendix.
Like all Teaching Tools, this article has undergone rigorous peer review, and includes a set of PowerPoint slides for use in teaching, a review article suitable for undergraduates, a teaching guide with questions to prompt students to synthesize the information presented, and a short, 24-slide abridged slide set.