Lettuce seed germination. Modulation of pregermination protein synthesis by gibberellic acid, abscisic acid, and cytokinin
Journal Article
·
· Plant Physiol.; (United States)
Protein synthesis in gibberellin-treated lettuce (Lactuca sativa) seeds has been studied during the lag phase between the beginning of imbibition and the first signs of radicle protrusion. When compared to the water-imbibed controls, both polyribosome populations and radioactive leucine incorporation into protein increase in the embryos of GA/sub 3/-induced seeds early in the imbibition period. Since these results are contradictory to previously published studies, the reasons for the differences are outlined and various alternative possibilities eliminated. The protocol for protein extraction, particularly the speed at which the supernatant from the seed homogenate is cleared, is important for demonstrating the GA/sub 3/-mediated changes. Embryos maintained in the dormant state by abscisic acid still conduct considerable amounts of protein synthesis, and this is enhanced by concentrations of 6-benzylaminopurine which also promote germination. Therefore, the actions of GA/sub 3/, abscisic acid, and cytokinin on lettuce seed germination are mediated, directly or indirectly, via protein synthesis.
- Research Organization:
- Univ. of Calgary, Alberta
- OSTI ID:
- 7107084
- Journal Information:
- Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 58:4; ISSN PLPHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550200* -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
AMINO ACIDS
AUXINS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOSYNTHESIS
CARBOXYLIC ACIDS
CELL CONSTITUENTS
ESTERS
EXTRACTION
FOOD
GERMINATION
GIBBERELLIC ACID
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXY ACIDS
ISOTOPES
LABELLED COMPOUNDS
LACTONES
LETTUCE
LEUCINE
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOIDS
OXYGEN COMPOUNDS
PLANT GROWTH REGULATORS
PROTEINS
PURINES
RADIOISOTOPES
RIBOSOMES
SEEDS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNTHESIS
TRITIUM
VEGETABLES
WATER
YEARS LIVING RADIOISOTOPES
59 BASIC BIOLOGICAL SCIENCES
AMINO ACIDS
AUXINS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOSYNTHESIS
CARBOXYLIC ACIDS
CELL CONSTITUENTS
ESTERS
EXTRACTION
FOOD
GERMINATION
GIBBERELLIC ACID
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXY ACIDS
ISOTOPES
LABELLED COMPOUNDS
LACTONES
LETTUCE
LEUCINE
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOIDS
OXYGEN COMPOUNDS
PLANT GROWTH REGULATORS
PROTEINS
PURINES
RADIOISOTOPES
RIBOSOMES
SEEDS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNTHESIS
TRITIUM
VEGETABLES
WATER
YEARS LIVING RADIOISOTOPES