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Relative humidity is a key factor in the acclimation of the stomatal response to CO2
Year:
2003
Source of publication :
Journal of Experimental Botany
Authors :
רווה, ערן
;
.
Volume :
54
Co-Authors:
Talbott, L.D., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States
Rahveh, E., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States, Institute of Horticulture, Agricultural Research Organization, Volcani Center, POB 6, Bet-Dagan 50250, Israel
Zeiger, E., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States
Facilitators :
From page:
2141
To page:
2147
(
Total pages:
7
)
Abstract:
Previous work has shown that stomata of growth chamber-grown Vicia faba leaves have an enhanced CO2 response when compared with stomata of greenhouse-grown plants. This guard cell response to CO2 acclimatizes to the environmental conditions on the transfer of plants between the two environments. In the present study, air relative humidity is identified as a key environmental factor mediating the changes in stomatal sensitivity to CO2. In the greenhouse environment, elevation of relative humidity to growth chamber levels resulted in an enhanced CO2 response, whereas a reduction in the light level to that comparable to growth chamber conditions had no effect on stomatal CO2 sensitivity. The transfer of plants between humidified and normal greenhouse conditions resulted in an acclimation response with a time-course matching that previously obtained in transfers of plants between greenhouse and growth chamber environments. The high stomatal sensitivity to CO2 of growth chamber-grown plants could be reduced by lowering growth chamber relative humidity and then restored with its characteristic acclimation time-course by an elevation of relative humidity. Leaf temperature was unchanged during this restoration, eliminating it as a primary factor in the acclimation response. Humidity regulation of stomatal CO2 sensitivity could function as a signal for leaves inside dense foliage canopies, promoting stomatal opening under low light, low CO2 conditions.
Note:
Related Files :
drug effect
greenhouse effect
Growth, Development and Aging
humidity
light
Vicia
Vicia faba
עוד תגיות
תוכן קשור
More details
DOI :
10.1093/jxb/erg215
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31526
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:03
Scientific Publication
Relative humidity is a key factor in the acclimation of the stomatal response to CO2
54
Talbott, L.D., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States
Rahveh, E., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States, Institute of Horticulture, Agricultural Research Organization, Volcani Center, POB 6, Bet-Dagan 50250, Israel
Zeiger, E., Dept. Organismal Biol., Ecol./Evol., University of California, Los Angeles, CA 90024, United States
Relative humidity is a key factor in the acclimation of the stomatal response to CO2
Previous work has shown that stomata of growth chamber-grown Vicia faba leaves have an enhanced CO2 response when compared with stomata of greenhouse-grown plants. This guard cell response to CO2 acclimatizes to the environmental conditions on the transfer of plants between the two environments. In the present study, air relative humidity is identified as a key environmental factor mediating the changes in stomatal sensitivity to CO2. In the greenhouse environment, elevation of relative humidity to growth chamber levels resulted in an enhanced CO2 response, whereas a reduction in the light level to that comparable to growth chamber conditions had no effect on stomatal CO2 sensitivity. The transfer of plants between humidified and normal greenhouse conditions resulted in an acclimation response with a time-course matching that previously obtained in transfers of plants between greenhouse and growth chamber environments. The high stomatal sensitivity to CO2 of growth chamber-grown plants could be reduced by lowering growth chamber relative humidity and then restored with its characteristic acclimation time-course by an elevation of relative humidity. Leaf temperature was unchanged during this restoration, eliminating it as a primary factor in the acclimation response. Humidity regulation of stomatal CO2 sensitivity could function as a signal for leaves inside dense foliage canopies, promoting stomatal opening under low light, low CO2 conditions.
Scientific Publication
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