Serine:glyoxylate aminotransferase mutant of barley
Conference
·
· Plant Physiol., Suppl.; (United States)
OSTI ID:6071263
A photorespiratory mutant of barley (LaPr 85/84), deficient in both of the major peaks of serine:glyoxylate aminotransferase activity detected in the wild type, also lacks serine:pyruvate and asparagine:glyoxylate aminotransferase activities. Genetic analysis of the mutation demonstrated that these three activities are all carried on the same enzyme. The mutant, when placed in air, accumulated a large pool of serine, showed the expected rate (50%) of ammonia release during photorespiration but produced CO/sub 2/ at twice the wild type rate when it was fed (/sup 14/C) glyoxylate. Compared with the wild type, LaPr 85/84 exhibited abnormal transient changes in chlorophyll a fluorescence when the CO/sub 2/ concentration of the air was altered, indicating that the rates of the fluorescence quenching mechanisms were affected in vivo by the lack of this enzyme.
- Research Organization:
- Univ. of Lancaster, England
- OSTI ID:
- 6071263
- Report Number(s):
- CONF-8707108-
- Conference Information:
- Journal Name: Plant Physiol., Suppl.; (United States) Journal Volume: 83:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AMIDES
AMINO ACIDS
AMINOTRANSFERASES
ASPARAGINE
BARLEY
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CEREALS
CHALCOGENIDES
CHROMOSOME LOSSES
ENZYME ACTIVITY
ENZYMES
GENE MUTATIONS
GRASS
HYDROXY ACIDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LOSSES
MUTANTS
MUTATIONS
NITROGEN TRANSFERASES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
RESPIRATION
SERINE
TRACER TECHNIQUES
TRANSFERASES
59 BASIC BIOLOGICAL SCIENCES
AMIDES
AMINO ACIDS
AMINOTRANSFERASES
ASPARAGINE
BARLEY
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CEREALS
CHALCOGENIDES
CHROMOSOME LOSSES
ENZYME ACTIVITY
ENZYMES
GENE MUTATIONS
GRASS
HYDROXY ACIDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LOSSES
MUTANTS
MUTATIONS
NITROGEN TRANSFERASES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
RESPIRATION
SERINE
TRACER TECHNIQUES
TRANSFERASES