Claim · model-written summary
Photosynthesis of subalpine plants responded rapidly in all growth forms to changes in sunlight due to clouds.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
t0“Subalpine Plants”
e0“photosynthesis responded rapidly in all growth forms to changes in sunlight due to clouds”
Title
Influence of Growth from on Ecophysiological Responses to Variable Sunlight in Subalpine Plants
Alan K. Knapp; William K. Smith Ecology 1989. doi:10.2307/1941376
Other claims from this paper (9)
- Observation Stomatal conductance of subalpine plants responded more slowly or not at all to changes in sunlight due to clouds.
- Observation Large reductions in photosynthesis were measured during cloud periods for all species.
- Observation Stomatal conductance was considerably less responsive to changes in sunlight in woody species.
- Observation The greatest and most variable reductions in stomatal conductance during shade (<10 to a 68% reduction of full sun levels) occurred in herbaceous species.
- Observation Carbon gain in the woody species was enhanced because stomatal conductance remained relatively high during both sun and shade periods.
- Intervention effect Water use efficiency in most subalpine species was generally lower during shade periods than during full sun periods.
- Observation Woody plants maintained higher xylem pressure potentials, much nearer shade values, than herbs.
- Observation The greater decrease in stomatal conductance and photosynthesis in herbs during shade resulted in improved water use efficiency.
- Observation Carbon gain in herbs was reduced during both shade and the subsequent full-sun period.