Claim · model-written summary
The greatest and most variable reductions in stomatal conductance during shade (<10 to a 68% reduction of full sun levels) occurred in herbaceous species.
- Taxon
- herbaceous speciese0
- Treatment
- shadee0
- Outcome
- reductions in stomatal conductancee0
- Value
- <10 to a 68% reduction of full sun levelse0
- Comparator
- full sun levelse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingDirectionQualifier
Verbatim
e0“The greatest and most variable reductions in stomatal conductance during shade (<10 to a 68% reduction of full sun levels) occurred in herbaceous species”
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 Photosynthesis of subalpine plants responded rapidly in all growth forms to changes in sunlight due to clouds.
- 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 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.