Ectopic Expression of Distinct PLC Genes Identifies 'Compactness' as a Possible Architectural Shoot Strategy to Cope with Drought Stress.

Autor:	van Hooren M; Plant Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 1210, Amsterdam 1000BE, The Netherlands., van Wijk R; Plant Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 1210, Amsterdam 1000BE, The Netherlands., Vaseva II; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, Ghent B-9000, Belgium., Van Der Straeten D; Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, Ghent B-9000, Belgium., Haring M; Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 1210, Amsterdam 1000BE, The Netherlands., Munnik T; Plant Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 1210, Amsterdam 1000BE, The Netherlands.
Jazyk:	angličtina
Zdroj:	Plant & cell physiology [Plant Cell Physiol] 2024 Jun 27; Vol. 65 (6), pp. 885-903.
DOI:	10.1093/pcp/pcad123
Abstrakt:	Phospholipase C (PLC) has been implicated in several stress responses, including drought. Overexpression (OE) of PLC has been shown to improve drought tolerance in various plant species. Arabidopsis contains nine PLC genes, which are subdivided into four clades. Earlier, OE of PLC3, PLC5 or PLC7 was found to increase Arabidopsis' drought tolerance. Here, we confirm this for three other PLCs: PLC2, the only constitutively expressed AtPLC; PLC4, reported to have reduced salt tolerance and PLC9, of which the encoded enzyme was presumed to be catalytically inactive. To compare each PLC and to discover any other potential phenotype, two independent OE lines of six AtPLC genes, representing all four clades, were simultaneously monitored with the GROWSCREEN-FLUORO phenotyping platform, under both control- and mild-drought conditions. To investigate which tissues were most relevant to achieving drought survival, we additionally expressed AtPLC5 using 13 different cell- or tissue-specific promoters. While no significant differences in plant size, biomass or photosynthesis were found between PLC lines and wild-type (WT) plants, all PLC-OE lines, as well as those tissue-specific lines that promoted drought survival, exhibited a stronger decrease in 'convex hull perimeter' (= increase in 'compactness') under water deprivation compared to WT. Increased compactness has not been associated with drought or decreased water loss before although a hyponastic decrease in compactness in response to increased temperatures has been associated with water loss. We propose that the increased compactness could lead to decreased water loss and potentially provide a new breeding trait to select for drought tolerance. (© The Author(s) 2023. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.)
Databáze:	MEDLINE
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