Developmental abnormalities and reduced fruit softening in tomato plants expressing an antisense rab11 GTPase gene

Lu, C. ORCID: 0000-0002-0064-4725, Zainal, Z., Tucker, G.A. and Lycett, G.W., 2001. Developmental abnormalities and reduced fruit softening in tomato plants expressing an antisense rab11 GTPase gene. The Plant Cell, 13 (8), pp. 1819-1833. ISSN 1040-4651

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A cDNA clone from tomato fruit encodes a protein with strong homology with the rab11/YPT3 class of small GTPases that is thought to be involved in the control of protein trafficking within cells. The gene, LeRab11a, showed a pattern consistent with a single copy in DNA gel blots. The corresponding mRNA was developmentally regulated during fruit ripening, and its expression was inhibited in several ripening mutants. Its reduced expression in the Never-ripe mutant indicates that it may be induced by ethylene in fruit. The ripening-induced expression in tissues that are undergoing cell wall loosening immediately suggests a possible role in trafficking of cell wall–modifying enzymes. The message
also was produced in leaves and flowers but not in roots. Antisense transformation was used to generate a “mutant
phenotype.” Antisense fruit changed color as expected but failed to soften normally. This was accompanied by reduced levels of two cell wall hydrolases, pectinesterase and polygalacturonase. There were other phenotypic effects in the plants, including determinate growth, reduced apical dominance, branched inflorescences, abnormal floral structure, and ectopic shoots on the leaves. In some plants, ethylene production was reduced. These data suggest an alternative or additional role in exocytosis or endocytosis of homeotic proteins, hormone carriers, or receptors.

Item Type: Journal article
Publication Title: The Plant Cell
Creators: Lu, C., Zainal, Z., Tucker, G.A. and Lycett, G.W.
Publisher: American Society of Plant Biologists (ASPB)
Date: 1 August 2001
Volume: 13
Number: 8
ISSN: 1040-4651
Rights: © 2001 American Society of Plant Biologists.
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Record created by: Jill Tomkinson
Date Added: 09 Sep 2016 10:44
Last Modified: 09 Jun 2017 14:05

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