Light-induced STOMAGEN-mediated stomatal development in Arabidopsis leaves
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
26002974
DOI
10.1093/jxb/erv233
PII: erv233
Knihovny.cz E-resources
- Keywords
- Arabidopsis thaliana, PPFD, SDD1, STOMAGEN, TMM., stomatal density,
- MeSH
- Arabidopsis genetics growth & development metabolism radiation effects MeSH
- Photosynthesis MeSH
- Plant Leaves growth & development metabolism radiation effects MeSH
- Arabidopsis Proteins genetics metabolism MeSH
- Plant Stomata genetics growth & development metabolism radiation effects MeSH
- Gene Expression Regulation, Plant radiation effects MeSH
- Signal Transduction MeSH
- Light MeSH
- Gene Expression Regulation, Developmental radiation effects MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Arabidopsis Proteins MeSH
- Stomagen protein, Arabidopsis MeSH Browser
The initiation of stomata, microscopic valves in the epidermis of higher plants that control of gas exchange, requires a co-ordinated sequence of asymmetric and symmetric divisions, which is under tight environmental and developmental control. Arabidopsis leaves grown under elevated photosynthetic photon flux density have a higher density of stomata. STOMAGEN encodes an epidermal patterning factor produced in the mesophyll, and our observations indicated that elevated photosynthetic irradiation stimulates STOMAGEN expression. Our analysis of gain and loss of function of STOMAGEN further detailed its function as a positive regulator of stomatal formation on both sides of the leaf, not only in terms of stomatal density across the leaf surface but also in terms of their stomatal index. STOMAGEN function was rate limiting for the light response of the stomatal lineage in the adaxial epidermis. Mutants in pathways that regulate stomatal spacing in the epidermis and have elevated stomatal density, such as stomatal density and distribution (sdd1) and too many mouth alleles, displayed elevated STOMAGEN expression, suggesting that STOMAGEN is either under the direct control of these pathways or is indirectly affected by stomatal patterning, suggestive of a feedback mechanism. These observations support a model in which changes in levels of light irradiation are perceived in the mesophyll and control the production of stomata in the epidermis by mesophyll-produced STOMAGEN, and whereby, conversely, stomatal patterning, either directly or indirectly, influences STOMAGEN levels.
References provided by Crossref.org
Barley Genotypes Vary in Stomatal Responsiveness to Light and CO2 Conditions
