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Title: Helminthosporium maydis T toxin increased membrane permeability to Ca/sup 2 +/ in susceptible corn mitochondria

Abstract

Though Helminthosporium maydis race T (HmT) toxin decreased active Ca/sup 2 +/ uptake into mitochondria isolated from susceptible (T) but not resistant (N) corn. The mode of toxin action is not understood. This study shows that HmT toxin or A23187 (a Ca/sup 2 +/ ionophore) dissipated a Ca/sup 2 +/ gradient in T mitochondria. However, HmT toxin had no effect on Ca/sup 2 +/ gradients in N mitochondria or microsomal vesicles from T or N corn. The results suggest that HmT toxin increased membrane permeability to Ca/sup 2 +/ in mitochondria of T corn specifically.

Authors:
;
Publication Date:
Research Org.:
Univ. of Maryland, College Park
OSTI Identifier:
5998935
DOE Contract Number:  
AS05-82ER13015
Resource Type:
Journal Article
Journal Name:
Plant Physiol.; (United States)
Additional Journal Information:
Journal Volume: 75:1
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; CALCIUM; MEMBRANE TRANSPORT; CELL MEMBRANES; PERMEABILITY; MITOCHONDRIA; SENSITIVITY; TOXINS; BIOLOGICAL EFFECTS; DISEASE RESISTANCE; FUNGI; MAIZE; MICROSOMES; ALKALINE EARTH METALS; ANTIGENS; CELL CONSTITUENTS; CEREALS; ELEMENTS; GRASS; MATERIALS; MEMBRANES; METALS; ORGANOIDS; PLANTS; TOXIC MATERIALS; 553000* - Agriculture & Food Technology; 550300 - Cytology

Citation Formats

Holden, M J, and Sze, H. Helminthosporium maydis T toxin increased membrane permeability to Ca/sup 2 +/ in susceptible corn mitochondria. United States: N. p., 1984. Web.
Holden, M J, & Sze, H. Helminthosporium maydis T toxin increased membrane permeability to Ca/sup 2 +/ in susceptible corn mitochondria. United States.
Holden, M J, and Sze, H. 1984. "Helminthosporium maydis T toxin increased membrane permeability to Ca/sup 2 +/ in susceptible corn mitochondria". United States.
@article{osti_5998935,
title = {Helminthosporium maydis T toxin increased membrane permeability to Ca/sup 2 +/ in susceptible corn mitochondria},
author = {Holden, M J and Sze, H},
abstractNote = {Though Helminthosporium maydis race T (HmT) toxin decreased active Ca/sup 2 +/ uptake into mitochondria isolated from susceptible (T) but not resistant (N) corn. The mode of toxin action is not understood. This study shows that HmT toxin or A23187 (a Ca/sup 2 +/ ionophore) dissipated a Ca/sup 2 +/ gradient in T mitochondria. However, HmT toxin had no effect on Ca/sup 2 +/ gradients in N mitochondria or microsomal vesicles from T or N corn. The results suggest that HmT toxin increased membrane permeability to Ca/sup 2 +/ in mitochondria of T corn specifically.},
doi = {},
url = {https://www.osti.gov/biblio/5998935}, journal = {Plant Physiol.; (United States)},
number = ,
volume = 75:1,
place = {United States},
year = {Tue May 01 00:00:00 EDT 1984},
month = {Tue May 01 00:00:00 EDT 1984}
}