Stomatal aperture can compensate altered stomatal density in Arabidopsis thaliana at growth light conditions

Functional Plant Biology : FPB
Dirk BüssisT Altmann

Abstract

Stomatal density of transgenic Arabidopsis thaliana plants over-expressing the SDD1 (stomatal density and distribution) gene was reduced to 40% and in the sdd1-1 mutant increased to 300% of the wild type. CO2 assimilation rate and stomatal conductance of over-expressers and the sdd1-1 mutant were unchanged compared with wild types when measured under the light conditions the plants were exposed to during growth. Lower stomatal density was compensated for by increased stomatal aperture and conversely, increased stomatal density was compensated for by reduced stomatal aperture. At high light intensities the assimilation rates and stomatal conductance of SDD1 over-expressers were reduced to 80% of those in wild type plants. Areas beneath stomata and patches lacking stomata were analysed separately. In areas without stomata, maximum fluorescence yield (Fv / Fm) and quantum yield of photosystem II (Φ PSII) were significantly lower than in areas beneath stomata. In areas beneath stomata, Fv / Fm and Φ PSII were identical to levels measured in wild type leaves. At high light intensities over-expressers showed decreased photochemical quenching (qP) compared with wild types. However, the decrease of qP was significantly stronger in area...Continue Reading

References

Feb 1, 1996·Plant Physiology·J. R. Evans, S. Von Caemmerer
Jun 5, 2004·Science·Dominique C BergmannChris R Somerville
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Citations

Jul 31, 2007·Plant, Cell & Environment·James I L Morison, Tracy Lawson
Feb 26, 2013·The New Phytologist·Yu TanakaIkuko Hara-Nishimura
May 31, 2019·Journal of Experimental Botany·Qingjie DuJianming Li
Jul 20, 2007·The New Phytologist·J FlexasH Medrano
Jan 5, 2007·Annual Review of Plant Biology·Dominique C Bergmann, Fred D Sack
Jan 11, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Timothy Doheny-AdamsJulie E Gray
Feb 24, 2016·Frontiers in Plant Science·Yuree LeeJune M Kwak
Apr 1, 2008·Functional Plant Biology : FPB·Eve EensaluOlevi Kull
Dec 17, 2008·The New Phytologist·Tracy Lawson
Sep 17, 2015·Plant Signaling & Behavior·Joachim FisahnPeter Barlow
Mar 22, 2019·Frontiers in Plant Science·Lígia T BertolinoJulie E Gray
May 7, 2020·Frontiers in Plant Science·Yuanyuan Wang, Zhong-Hua Chen
Nov 19, 2020·Proceedings. Biological Sciences·Kirsten Bomblies
Apr 14, 2009·Plant Physiology·Hernán E BoccalandroJorge J Casal
Mar 1, 2014·Plant Physiology·Tracy Lawson, Michael R Blatt

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Methods Mentioned

BETA
transgenic
light microscopy

Software Mentioned

WinControl
Diagas
Meta Imaging
MetaVue

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