Light: shade adaptation
Journal Article
·
· Plant Physiol.; (United States)
OSTI ID:7099036
Using chlorophyll/P700 ratios, the size and number of photosynthetic units were estimated, as a function of light-shade adaptation in two species of marine phytoplankton: Skeletonema costatum, a diatom, and Dunaliella tertiolecta, a chlorophyte. In the diatom, light-shade adaptation is characterized primarily by changes in the size and not the number of P700 units, whereas in the chlorophyte, overall changes in chlorophyll content are related to changes in the number and not the size of P700 units. A correlation between the characteristics of P700 units and photosynthetic responses was not established. Both strategies of light-shade adaptation effectively harvest and transfer light energy to reaction centers; however, the Skeletonema strategy is more effective at subsaturating intensities. The two strategies may represent an evolutionary divergence in photosynthetic adaptation to variations in light intensity.
- Research Organization:
- Brookhaven National Lab., Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7099036
- Journal Information:
- Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 66:4; ISSN PLPHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550200 -- Biochemistry
550500* -- Metabolism
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ALGAE
AQUATIC ORGANISMS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL ADAPTATION
BIOLOGICAL EFFECTS
BIOLOGICAL VARIABILITY
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLOROPHYLL
DIATOMS
ELECTROMAGNETIC RADIATION
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
KINETICS
METABOLISM
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PLANTS
PORPHYRINS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RADIATIONS
REACTION KINETICS
SENSITIVITY
SYNTHESIS
VISIBLE RADIATION
550500* -- Metabolism
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ALGAE
AQUATIC ORGANISMS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL ADAPTATION
BIOLOGICAL EFFECTS
BIOLOGICAL VARIABILITY
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLOROPHYLL
DIATOMS
ELECTROMAGNETIC RADIATION
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
KINETICS
METABOLISM
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PLANTS
PORPHYRINS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RADIATIONS
REACTION KINETICS
SENSITIVITY
SYNTHESIS
VISIBLE RADIATION