Record Details

Title:
Effects of Ca2+ and Mg2+ on elongation and H+ secretion of Vigna radiata hypocotyl sections
Publication date:
1984
Summary:
The effects exerted by divalent cations Ca2+ and Mg2+ on spontaneous, IAA- and H+-induced elongation were investigated with excised mungbean hypocotyl segments. Low concentrations of calcium (<1 mM) were sufficient to inhibit spontaneous and IAA-induced elongation of abraded segments without any lag time whereas effects of magnesium were not so evident. The initial growth rate could be restored, at least partly, with EDTA or acidic solutions. Both calcium and magnesium enhanced H+ excretion but Mg2+ was a more potent activator. Divalent cations also induced simultaneously an inhibition of growth and a stimulation of proton release. Such contrasting effects are discussed with respect to the functions of the cuticle. [AS/SS]
Call number:
A:PS
Journal citation:
Contact information:
harvest@worldveg.org

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 Record created 1985-05-30, last modified 2019-03-04


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