DISTRIBUTION OF IAA-OXIDASE AND PEROXIDASE IN ETIOLATED HYPOCOTYLS OF LUPINUS <i>ALBUS</i>, L. THEIR RELATIONSHIP WITH GROWTH

Authors

  • J. Sánchez-Bravo
  • C. Núñez
Keywords: growth, hypocotyl, IAA-oxidase, Lupinus <i>albus</i>, peroxidas

Abstract

The enzymatic IAA-oxidase and peroxidase activities in homogenates of zones from different localizations along the etiolated hypocotyls of Lupinus albus, L are studied. In actively growing 9 day old seedlings, both activities expressed on a per fresh weight basis, show a decreasing distribution starting from the cotyledons. The specific activities, however exhibit a bell-shaped distribution that is parallel to that of growth. At 15 days, the distribution of IAA-oxidase as well as of peroxidase, tends to be more uniform along the whole hypocotyl as a consequence of the decrease in activity in the apical zones and the increase in the basal. The activities per g fresh weight show a distribution very similar to that of growth. On the other hand, the specific activities oscillate along the hypocotyls, the highest values being in the apical (growing) and in the basa1 zones. The role of IAA-oxidase in the control of the IAA content during the hypocotyl growth is discussed.

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Author Biographies

J. Sánchez-Bravo

Universidad de Murcia

C. Núñez

Universidad de Murcia
How to Cite
Sánchez-Bravo, J., & Núñez, C. (1990). DISTRIBUTION OF IAA-OXIDASE AND PEROXIDASE IN ETIOLATED HYPOCOTYLS OF LUPINUS <i>ALBUS</i>, L. THEIR RELATIONSHIP WITH GROWTH. Anales de Biología, (16), 137–142. Retrieved from https://revistas.um.es/analesbio/article/view/33711
Issue
Section
Biología vegetal