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Plant Physiology 68:41-43 (1981)
© 1981 American Society of Plant Biologists

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Articles

Hypocotyl Growth and Peroxidases of Bidens pilosus1

EFFECT OF COTYLEDONARY PRICKINGS AND LITHIUM PRETREATMENT

Marie-Odile Desbiez and Nicole Boyer

Thomas Gaspar

Laboratoire de Phytomorphogenèse, 4, rue Ledru, 63000-Clermont-Ferrand, France, Laboratoire de Biologie végétale, 22, quai Van Beneden, 4020-Liège, Belgium

Pricking one cotyledon of young Bidens pilosus plants induces rapid inhibition of hypocotyl growth, essentially in its middle portion. Analysis of soluble peroxidases indicates rapid changes (increase of activity) in basic isoenzymes followed by more progressive enhancement of the acidic ones. Pretreatment of the plants with lithium prevents the inhibition of elongation due to pricking as well as the peroxidase changes. The phenomenon is similar to the previously described thigmomorphogenetic process in Bryonia dioica.

1 Research supported by the French CNRS (LA 45, RCP 474, ATP 4108) and by the Belgian Fonds de la Recherche Fondamentale Collective (grant 2.9009 to T. G.).




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Copyright © 1981 by the American Society of Plant Biologists