Effects of Ca2+ and Mg2+ on elongation and H+ secretion of Vigna radiata hypocotyl sections
1984
A:PS
Details
Title
Effects of Ca2+ and Mg2+ on elongation and H+ secretion of Vigna radiata hypocotyl sections
Publication Date
1984
Call Number
A:PS
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]
Journal Citation
v.25(8):1459-1467, PLANT AND CELL PHYSIOLOGY
Contact Information
harvest@worldveg.org
Record Appears in
Research > Published Articles