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

Journal Article · Tue May 01 00:00:00 EDT 1984 · Plant Physiol.; (United States)

OSTI ID:5998935

Holden, M J; Sze, H

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.

• Research Organization: Univ. of Maryland, College Park
• DOE Contract Number: AS05-82ER13015
• OSTI ID: 5998935
• Journal Information: Plant Physiol.; (United States), Vol. 75:1
• Country of Publication: United States
• Language: English

Related Subjects

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