Long-term acid-induced wall extension in an in-vitro system

R. E. Cleland, D. Cosgrove, M. Tepfer

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

When frozen-thawed Avena sativa L. coleoptile and Cucumis sativa L. hypocotyl sections, under tension, are acid-treated, they undergo rapid elongation (acid-extension). The acid-extension response consists of two concurrent phases: a burst of extension which decays exponentially over 1-2 h (ExE), and a constant rate of extension (CE) which can persist for at least 6 h. The extension (AL) is closely represented by the equation: ΔL = a - a · ekt + c · t where a is the total extension of the exponential phase, k is the rate constant for ExE, and c is the rate of linear extension (CE). Low pH and high tension increased a and c, whereas temperature influenced k. The magnitude of the CE (over 50% extension/10 h), the similarity in its time course to auxin-induced growth, and the apparent yield threshold for CE indicate that CE is more likely than ExE to be the type of extension which cell walls undergo during normal auxin-induced growth.

Original languageEnglish (US)
Pages (from-to)379-385
Number of pages7
JournalPlanta
Volume170
Issue number3
DOIs
StatePublished - Mar 1 1987

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Indoleacetic Acids
Acids
auxins
acids
Cucumis
Hypocotyl
Cotyledon
coleoptiles
Avena sativa
Growth
Cell Wall
hypocotyls
deterioration
cell walls
Temperature
In Vitro Techniques
temperature
Avena

All Science Journal Classification (ASJC) codes

  • Genetics
  • Plant Science

Cite this

Cleland, R. E. ; Cosgrove, D. ; Tepfer, M. / Long-term acid-induced wall extension in an in-vitro system. In: Planta. 1987 ; Vol. 170, No. 3. pp. 379-385.
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Long-term acid-induced wall extension in an in-vitro system. / Cleland, R. E.; Cosgrove, D.; Tepfer, M.

In: Planta, Vol. 170, No. 3, 01.03.1987, p. 379-385.

Research output: Contribution to journalArticle

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AU - Cosgrove, D.

AU - Tepfer, M.

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