Development and function of membrane systems in plant tissue. Progress report, July 15, 1980-September 15, 1981

Technical Report · Thu Oct 01 00:00:00 EDT 1981

OSTI ID:6012956

Hanson, J B

Over the past 14 months, investigations of ion transport mechanisms in corn roots and mitochondria have continued. With mitochondria, citrate and malate can be transported by a mechanism that does not involve exchange for phosphate. Evidence exists for an anion/H/sup +/ co-transport mechanism which will function under both energized and passive conditions. In the root investigations, it was found that any injury or shock results in blockage of the H/sup +/ efflux pumping mechanism, and that FC restores the activity. Studies with inhibitors indicate the H/sup +/ channel of the ATPase to be the site of control. Injury or shock appears to act by making the membrane permeable to Ca/sup 2 +/, which appears to directly or indirectly act to inhibit the ATPase. Preliminary work with isolated plasmalemma preparations supports this view.

• Research Organization: Illinois Univ., Urbana (USA). Dept. of Botany
• DOE Contract Number: AS02-76EV00790
• OSTI ID: 6012956
• Report Number(s): DOE/EV/00790-005; ON: DE82002113
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CELL MEMBRANES
PERMEABILITY
MEMBRANE TRANSPORT
BIOCHEMICAL REACTION KINETICS
MITOCHONDRIA
PLANT CELLS
ANIONS
ATP-ASE
BIOLOGICAL SHOCK
ENZYME INHIBITORS
INJURIES
MAIZE
PROTONS
ROOTS
ACID ANHYDRASES
BARYONS
CELL CONSTITUENTS
CEREALS
CHARGED PARTICLES
ELEMENTARY PARTICLES
ENZYMES
FERMIONS
GRAMINEAE
GRASS
HADRONS
HYDROLASES
IONS
KINETICS
MEMBRANES
NUCLEONS
ORGANOIDS
PATHOLOGICAL CHANGES
PHOSPHOHYDROLASES
PLANTS
REACTION KINETICS
550300* - Cytology
550200 - Biochemistry