Claim · model-written summary
The decrease in conductance-response magnitude with VPD is concluded to be due to an earlier onset of stomatal closure that terminated the pulse response.
- Taxon
- soybean
Glycine maxe1 - Outcome
- magnitude of the integrated conductance responsee2
- Qualifier
- an earlier onset of stomatal closure that terminated the pulse responsee2
Verbatim
e1“The effect of leaf-air vapor pressure difference (VPD) on the magnitude of the stomatal response to blue light was investigated in soybean (Glycine max)”
e2“At 20 degrees C and 25 degrees C, the magnitude of the integrated conductance response decreased with increasing VPD (0.4 to 2.6 kiloPascals), due to an earlier onset of stomatal closure that terminated the pulse response”
Title
The Magnitude of the Stomatal Response to Blue Light
Sarah M. Assmann; David A. Grantz PLANT PHYSIOLOGY 1990. doi:10.1104/pp.93.2.701
Other claims from this paper (6)
- Intervention effect At 20 and 25 degrees C, the magnitude of the integrated conductance response decreased with increasing VPD.
- Intervention effect At 30 degrees C, the magnitude of the conductance response increased with rising VPD.
- Mechanism The increase in conductance-response magnitude at 30 degrees C is concluded to be due to an increasing maximum excursion of the conductance response despite accelerated stomatal closure.
- Association The magnitude of the pulse-induced conductance response correlated with VPD rather than with transpiration.
- Mechanism Water relations or metabolite movements within epidermal tissue, rather than bulk leaf tissue, are suggested to interact with guard cell photobiology in regulating the blue light response.
- Mechanism VPD modulation of pulse magnitude could reduce water loss during stomatal responses to transient illumination in soybean.