Association of Specific Expansins with Growth in Maize Leaves Is Maintained under Environmental, Genetic, and Developmental Sources of Variation

Muller, Bertrand; Bourdais, Gildas; Reidy, Beat; Bencivenni, Christelle; Massonneau, Agnès; Condamine, Pascal; Rolland, Gaëlle; Conéjéro, Geneviève; Rogowsky, Peter; Tardieu, François (2006). Association of Specific Expansins with Growth in Maize Leaves Is Maintained under Environmental, Genetic, and Developmental Sources of Variation Plant Physiology, 143(1), pp. 278-290. American Society of Plant Biologists 10.1104/pp.106.087494

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We aimed to evaluate whether changes in maize (Zea mays) leaf expansion rate in response to environmental stimuli or developmental gradients are mediated by common or specific expansins, a class of proteins known to enhance cell wall extensibility. Among the 33 maize expansin or putative expansin genes analyzed, 19 were preferentially expressed at some point of the leaf elongation zone and these expansins could be organized into three clusters related to cell division, maximal leaf expansion, and cell wall differentiation. Further analysis of the spatial distribution of expression was carried out for three expansins in leaves displaying a large range of expansion rates due to water deficit, genotype, and leaf developmental stage. With most sources of variation, the three genes showed similar changes in expression and consistent association with changes in leaf expansion. Moreover, our analysis also suggested preferential association of each expansin with elongation, widening, or both of these processes. Finally, using in situ hybridization, expression of two of these genes was increased in load-bearing tissues such as the epidermis and differentiating xylem. Together, these results suggest that some expansins may be preferentially related to elongation and widening after integrating several spatial, environmental, genetic, and developmental cues.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Agricultural, Forest and Food Sciences HAFL > Resource-efficient agricultural production systems School of Agricultural, Forest and Food Sciences HAFL > Agriculture
Name:	Muller, Bertrand; Bourdais, Gildas; Reidy, Beat0000-0002-8619-0209; Bencivenni, Christelle; Massonneau, Agnès; Condamine, Pascal; Rolland, Gaëlle; Conéjéro, Geneviève; Rogowsky, Peter and Tardieu, François
Subjects:	Q Science > QK Botany S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture
ISSN:	0032-0889
Publisher:	American Society of Plant Biologists
Language:	English
Submitter:	Lukas Blaser
Date Deposited:	24 Feb 2020 07:22
Last Modified:	18 Dec 2020 13:29
Publisher DOI:	10.1104/pp.106.087494
Additional Information:	Im Artikel so erwähnt: Plant Physiology, January 2007, Vol. 143, pp. 278–29
ARBOR DOI:	10.24451/arbor.9108
URI:	https://arbor.bfh.ch/id/eprint/9108