Mechanisms of stomatal development: an evolutionary view

Anne Vatén,Dominique C Bergmann

doi:10.1186/2041-9139-3-11

Abstract

Plant development has a significant postembryonic phase that is guided heavily by interactions between the plant and the outside environment. This interplay is particularly evident in the development, pattern and function of stomata, epidermal pores on the aerial surfaces of land plants. Stomata have been found in fossils dating from more than 400 million years ago. Strikingly, the morphology of the individual stomatal complex is largely unchanged, but the sizes, numbers and arrangements of stomata and their surrounding cells have diversified tremendously. In many plants, stomata arise from specialized and transient stem-cell like compartments on the leaf. Studies in the flowering plant Arabidopsis thaliana have established a basic molecular framework for the acquisition of cell fate and generation of cell polarity in these compartments, as well as describing some of the key signals and receptors required to produce stomata in organized patterns and in environmentally optimized numbers. Here we present parallel analyses of stomatal developmental pathways at morphological and molecular levels and describe the innovations made by particular clades of plants.

Highlights

Introduction to stomata and stomatal patternPlants conquered land more than 400 million years ago
Given the current patterns and developmental processes associated with stomata of flowering plants, what were their origins? In the simplified ontogeny seen in some mosses, stomatal development involves a single asymmetric cell division giving rise directly to a guard mother cell (GMC) (Figure 4)
After formation of a GMC, neighboring subsidiary mother cells (SMCs) divide asymmetrically to produce small subsidiary cells next to the GMC (Figures 2G and 4)

Summary

Introduction

Introduction to stomata and stomatal patternPlants conquered land more than 400 million years ago. In extant bryophytes, both guard cell morphology and regulation of pore aperture can closely resemble higher plant stomata. In the simplified ontogeny seen in some mosses, stomatal development involves a single asymmetric cell division giving rise directly to a GMC (Figure 4).

Results

Conclusion