Bown, Lindsay, Kusaba, Shinnosuke, Goubet, Florence, Codrai, Lesley, Dale, Aaron G., Zhang, Zhinong, Yu, Xiaolan, Morris, Karl, Ishii, Tadashi, Evered, Carol, Dupree, Paul and Jackson, Stephen. (2007) The ectopically parting cells 1-2 (epc1-2) mutant exhibits an exaggerated response to abscisic acid. JOURNAL OF EXPERIMENTAL BOTANY, 58 (7). pp. 1813-1823. ISSN 0022-0957

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Abstract

The ECTOPICALLY PARTING CELLS 1 (EPC1) gene encodes a putative retaining glycosyltransferase of the GT64 family, and epc1-1 mutant plants have a severely dwarfed phenotype. A new mutant allele of this gene, epc1-2, has been isolated. Reduced cell adhesion that has previously been reported for the epc1-1 mutant was not observed for either the epc1-1 or epc1-2 mutants grown in our conditions, suggesting that EPC1 does not affect cell adhesion but is involved in some other process affecting plant growth and development. It is shown that the epcl-2 mutant exhibits hypersensitivity to the phytohormone abscisic acid in germination and root elongation assays, however it shows an unaltered response to gibberellin, epibrassinosterold, auxin, or ethylene. An EPC1:YFP fusion protein is localized to small motile structures within the cytosol that are similar in size and number to the Golgi apparatus. Analysis of cell wall pectins revealed that levels of beta-(1,4)-galactan in the epcl-2 mutant are reduced by 50%, whilst other pectic polysaccharides (homogalacturonan, arabinan, and rhamnogalacturonan II) are unchanged.

Item Type:	Journal Article
Subjects:	S Agriculture > SB Plant culture
Journal or Publication Title:	JOURNAL OF EXPERIMENTAL BOTANY
Publisher:	OXFORD UNIV PRESS
ISSN:	0022-0957
Date:	2007
Volume:	58
Number:	7
Number of Pages:	11
Page Range:	pp. 1813-1823
Identification Number:	10.1093/jxb/erm040
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/31807

Data sourced from Thomson Reuters' Web of Knowledge

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