Variable expansin expression in Arabidopsis leads to different growth responses

Hoe Han Goh, Jennifer Sloan, Robert Malinowski, Andrew Fleming

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Expansins have long been implicated in the control of cell wall extensibility. However, despite ample evidence supporting a role for these proteins in the endogenous mechanism of plant growth, there are also examples in the literature where the outcome of altered expansin gene expression is difficult to reconcile with a simplistic causal linkage to growth promotion. To investigate this problem, we report on the analysis of transgenic Arabidopsis plants in which a heterologous cucumber expansin can be inducibly overexpressed. Our results indicate that the effects of expansin expression on growth depend on the degree of induction of expansin expression and the developmental pattern of organ growth. They support the role of expansin in directional cell expansion. They are also consistent with the idea that excess expansin might itself impede normal activities of cell wall modifications, culminating in both growth promotion and repression depending on the degree of expression.

Original languageEnglish
Pages (from-to)329-339
Number of pages11
JournalJournal of Plant Physiology
Volume171
Issue number3-4
DOIs
Publication statusPublished - 15 Feb 2014

Fingerprint

expansins
Arabidopsis
Growth
Cell Wall
growth promotion
Cucumis sativus
Genetically Modified Plants
cell walls
extensibility
Gene Expression
cucumbers
linkage (genetics)
plant growth
genetically modified organisms
gene expression
Proteins

Keywords

  • Arabidopsis
  • Expansin
  • Hypocotyl
  • Leaf development
  • Petiole

ASJC Scopus subject areas

  • Plant Science
  • Physiology
  • Agronomy and Crop Science

Cite this

Variable expansin expression in Arabidopsis leads to different growth responses. / Goh, Hoe Han; Sloan, Jennifer; Malinowski, Robert; Fleming, Andrew.

In: Journal of Plant Physiology, Vol. 171, No. 3-4, 15.02.2014, p. 329-339.

Research output: Contribution to journalArticle

Goh, Hoe Han ; Sloan, Jennifer ; Malinowski, Robert ; Fleming, Andrew. / Variable expansin expression in Arabidopsis leads to different growth responses. In: Journal of Plant Physiology. 2014 ; Vol. 171, No. 3-4. pp. 329-339.
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