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The growth-promoting fungal toxin fusicoccin does not act through an ester-hydrolysis mechanism in plants

The growth-promoting fungal toxin fusicoccin does not act through an ester-hydrolysis mechanism... Naturwissenschaften 77, 8 2 - 83 (1990) © Springer-Verlag 1990 M. SchrOder, S. Schulz and E. W. Weiler Lehrstuhl ftir Pflanzenphysiologie der Universit~t, D-4360 Bochum The mechanisms of growth regulation in higher plants are only poorly understood. However, it is well established that acidification o f the apoplast can stimulate growth in m a n y plant organs and especially in coleoptiles. P r o t o n extrusion from plant cells is largely due to the action o f a H +-translocating ATPase, located at the plasmalemma. The p H optimum of the enzyme is approximately 6.4 ([1], and refs. therein) while the cytoplasmic p H is usually maintained between 7.0 and 7.5. A n acidification o f the cytoplasm would thus result in a stimulation o f p r o t o n pumping by the ATPase. 0.7J= .I~0.5. u m ~e 0.3. oFC • FCol • FDA .~ o.1. -3 -2 =og Fc[~M] -1 Fig. 1. Stimulation of proton extrusion of cell suspensions of Corydalis sempervirens by fusicoccin (FC), 9'-norfusicoccin-8'-alcohol (FCol) or fluorescein diacetate (FDA). Mid-log cells (5 g wet mass) grown in LS medium [9] were freshly harvested, washed in degassed, CO2-free potassium phosphate http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Naturwissenschaften Springer Journals

The growth-promoting fungal toxin fusicoccin does not act through an ester-hydrolysis mechanism in plants

Schröder, M.; Schulz, S.; Weiler, E.
Naturwissenschaften , Volume 77 (2) – Feb 1, 1990
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References (11)

Publisher
Springer Journals
Copyright
Copyright © 1990 by Springer-Verlag
Subject
Life Sciences; Life Sciences, general; Environment, general
ISSN
0028-1042
eISSN
1432-1904
DOI
10.1007/BF01131779
Publisher site
See Article on Publisher Site

Abstract

Naturwissenschaften 77, 8 2 - 83 (1990) © Springer-Verlag 1990 M. SchrOder, S. Schulz and E. W. Weiler Lehrstuhl ftir Pflanzenphysiologie der Universit~t, D-4360 Bochum The mechanisms of growth regulation in higher plants are only poorly understood. However, it is well established that acidification o f the apoplast can stimulate growth in m a n y plant organs and especially in coleoptiles. P r o t o n extrusion from plant cells is largely due to the action o f a H +-translocating ATPase, located at the plasmalemma. The p H optimum of the enzyme is approximately 6.4 ([1], and refs. therein) while the cytoplasmic p H is usually maintained between 7.0 and 7.5. A n acidification o f the cytoplasm would thus result in a stimulation o f p r o t o n pumping by the ATPase. 0.7J= .I~0.5. u m ~e 0.3. oFC • FCol • FDA .~ o.1. -3 -2 =og Fc[~M] -1 Fig. 1. Stimulation of proton extrusion of cell suspensions of Corydalis sempervirens by fusicoccin (FC), 9'-norfusicoccin-8'-alcohol (FCol) or fluorescein diacetate (FDA). Mid-log cells (5 g wet mass) grown in LS medium [9] were freshly harvested, washed in degassed, CO2-free potassium phosphate

Journal

Naturwissenschaften – Springer Journals

Published: Feb 1, 1990

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