Stress and activity of molybdenum-containing complex (molybdenum cofactor) in winter wheat seeds

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.87.2.533· OSTI ID:5399946

Vunkova-Radeva, R; Schiemann, J; Mendel, R R; Salcheva, G; Georgieva, D ^[1]

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1. Institute of Plant Physiology,, Sofia (Bulgaria)

Molybdenum, applied in vivo, restored the damage from low temperature with winter wheat (Triticum aestivum, var Sadovo 1) grown on acid soil and, in addition, sharply increased productivity. Two fractions with molybdenum-cofactor activity in seeds were detected. One of them has a molecular weight of about 230 kilodaltons corresponding to xanthine oxidase activity and leaf nitrate reductase activity. The other has a molecular weight of about 60 kilodaltons. The ratio between the molybdenum-cofactor activity of these fractions was different in mother seeds used in the experiment, in seeds obtained from the damaged plants, and in seeds obtained from the damaged plants restored by in vivo molybdenum addition. Every one of these fractions consisted of several components in which molybdenum-cofactor activity and stability in vitro was different. We suggest that plants store molybdenum as molybdenum carriers in these low molecular weight fractions.

• OSTI ID: 5399946
• Journal Information: Plant Physiology; (USA), Vol. 87:2; ISSN 0032-0889
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
MOLYBDENUM
BIOLOGICAL EFFECTS
OXIDOREDUCTASES
ENZYME ACTIVITY
WHEAT
TEMPERATURE EFFECTS
BIOLOGICAL STRESS
MOLECULAR WEIGHT
SEEDS
CEREALS
ELEMENTS
ENZYMES
GRAMINEAE
LILIOPSIDA
MAGNOLIOPHYTA
METALS
PLANTS
TRANSITION ELEMENTS
560300* - Chemicals Metabolism & Toxicology
560200 - Thermal Effects