The mechanism of proton-induced increase of cell wall extensibility [sunflower]
1982
Sol, H. | Boetter, M. (Institut fuer Allgemeine Botanik, Hamburg (Germany, F.R.))
Acid-induced elongation of Helianthus hypocotyl epidermal strips was investigated. We found no indications for the existence of an acid activated cell wall loosening enzyme, as the elongation of living or frozen - thawed epidermal strips show no pH optimum. Pretreatment with formaldehyde is without influence on acid-induced extension. The effect of hydrogen ions can be substituted by Ca('2+)-chelating of EDTA with the same range of effectiveness. Other monovalent ions like potassium or sodium are much less effective than protons.
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