Touch‐Sensitive NADH Oxidase Activity of Pea and Cucumber Tendrils and Soybean Hypocotyl Sections

The cell surface reduced nicotinamide adenine dinucleotide (NADH) oxidase activity of soybean stems and of pea and cucumber tendrils responded to touch with a several‐fold increase in activity. The increase in NADH oxidase persisted for 20 min or longer, and further touch stimulation during this per...

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Bibliographic Details
Published in:International journal of plant sciences 2000-05, Vol.161 (3), p.387-391
Main Authors: Barr, Rita, Garcia, Claudia, Morré, D. James
Format: Article
Language:English
Subjects:
Auxins
Cell growth
Cell membranes
Cellular biology
Cucumbers
Hypocotyls
Oxidases
Oxidation
Peas
Soybeans
Tendrils
Vegetables
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Summary:The cell surface reduced nicotinamide adenine dinucleotide (NADH) oxidase activity of soybean stems and of pea and cucumber tendrils responded to touch with a several‐fold increase in activity. The increase in NADH oxidase persisted for 20 min or longer, and further touch stimulation during this period did not alter activity. With soybean sections, the specific activities in response to touch approximated those achieved maximally by auxin. Where the NADH oxidase was fully stimulated by 2,4‐d, the NADH oxidase failed to respond further to touch. The findings indicate that the NADH oxidase of the plant cell surface is involved in the growth response to touch and in tendril coiling.
ISSN:1058-5893
1537-5315
DOI:10.1086/314264