Projects per year
Stomata are pores found on the surfaces of leaves, and they regulate gas exchange between the plant and the environment . Stomatal development is highly plastic and is influenced by environmental signals . Light stimulates stomatal development, and this response is mediated by plant photoreceptors [3-5], with the red-light photoreceptor phytochrome B (phyB) having a dominant role in white light . Light also regulates stomatal development systemically, with the irradiance perceived by mature leaves modulating stomatal development in young leaves [6, 7]. Here, we show that phyB is required for this systemic response. Using a combination of tissue-specific expression and an inducible expression system in the loss-of-function phyB-9 mutant , we show that phyB expression in the stomatal lineage, mesophyll, and phloem is sufficient to restore wild-type stomatal development. Induction of PHYB in mature leaves also rescues stomatal development in young untreated leaves, whereas phyB mutants are defective in the systemic regulation of stomatal development. Our data show that phyB acts systemically to regulate cell fate decisions in the leaf epidermis. © 2014 The Authors.
|Number of pages||6|
|Publication status||Published - 2 Jun 2014|
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- 1 Finished
New insights into the control of stomatal aperture and development by CO2
15/01/12 → 15/04/15
Professor Alistair M Hetherington
- Elizabeth Blackwell Institute for Health Research
- Cabot Institute for the Environment
- School of Biological Sciences - Melville Wills Chair in Botany
- Plant and Agricultural Sciences
- Ecology and Environmental Change
Person: Academic , Member