Indoleacetic Acid and the synthesis of glucanases and pectic enzymes.

Plant Physiology
A H Datko, G A Maclachlan


Indoleacetic acid (IAA) and/or inhibitors of DNA, RNA or protein synthesis were added to the apex of decapitated seedlings of Pisum sativum L. var. Alaska. At various times up to 4 days, enzymic protein was extracted from a segment of epicotyl immediately below the apex and assayed for its ability to hydrolyse polysaccharides or their derivatives. With the exception of amylase, the total amounts per segment of all of the tested enzymes increased due to IAA treatment. The development of beta-1,4-glucanase (cellulase) activity per unit of protein or fresh weight proceeded according to a typical sigmoid induction curve. Pectinase was formed for about 2 days in control segments and IAA treatment resulted in continued synthesis for at least another 2 days provided cell division took place. beta-1,3-glucanase and pectinesterase activities were only enhanced by IAA to the extent that total protein levels increased. Reaction mechanisms for these effects and functions for the enzymes during growth are discussed.


Jun 13, 1967·Biochimica Et Biophysica Acta·M Katz, L Ordin
Apr 1, 1962·Archives of Biochemistry and Biophysics·P ALBERSHEIM, U KILLIAS
Mar 1, 1962·Archives of Biochemistry and Biophysics·L SHUSTER, R H GIFFORD
Jan 1, 1960·Plant Physiology·E F Jansen, R Jang
Jul 1, 1967·Plant Physiology·S H LeeR S Bandurski

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Aug 1, 1970·Plant Physiology·L N Lewis, J E Varner
Oct 1, 1977·Plant Physiology·R Pressey, J K Avants
Jun 1, 1979·Plant Physiology·R K Berger, P D Reid
Jul 1, 1969·Archives of Biochemistry and Biophysics·A N Heyn
Dec 7, 1979·Biochimica Et Biophysica Acta·Y S Wong, G A Maclachlan
Mar 21, 1969·Science·A W Galston, P J Davies

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