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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2008.11.006
|2 doi
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|a pubmed25n0619.xml
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|a (NLM)19131142
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Levine, Lanfang H
|e verfasserin
|4 aut
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|a Super-elevated CO2 interferes with stomatal response to ABA and night closure in soybean (Glycine max)
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 07.07.2009
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|a Date Revised 13.12.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Studies have shown stomatal conductance (g(s)) of plants exposed to super-elevated CO2 (>5000micromol mol(-1)) increases in several species, in contrast to a decrease of g(s) caused by moderate CO2 enrichment. We conducted a series of experiments to determine whether super-elevated CO2 alters stomatal development and/or interferes with stomatal closure in soybean (Glycine max). Plants were grown at nominal ambient (400), elevated (1200) and super-elevated (10,000micromol mol(-1)) CO2 in controlled environmental chambers. Stomatal density of the plant leaf was examined by a scanning electron microscope (SEM), while the stomatal response to the application of exogenous abscisic acid (ABA), a phytohormone associated with water stress and stomatal control, was investigated in intact growing plants by measuring the g(s) of abaxial leaf surfaces using a steady-state porometer. Relative to the control (400micromol mol(-1) CO2) plants, daytime stomatal conductance (g(s,day)) of the plants grown under 1200 and 10,000micromol mol(-1) CO2 was reduced by 38% and 15%, respectively. Dark period stomatal conductance (g(s,night)) was unaffected by growing under 1200mumol mol(-1) CO2) but dramatically increased under 10,000micromol mol(-1) CO2. Stomatal density increased by 10% in the leaves of 10,000micromol mol(-1) CO2-grown plants, which in part contributed to the higher g(s,night) values. Elevating [CO2] to 1200micromol mol(-1) enhanced ABA-induced stomatal closure, but further increasing CO2 to 10,000micromol mol(-1) significantly reduced ABA-induced stomatal closure. These results demonstrated that stomatal response to ABA is CO2 dependent. Hence, a stomatal failure to effectively respond to an ABA signal and to close at night under extremely high CO2 may increase plants susceptibility to other abiotic stresses
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Abscisic Acid
|2 NLM
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|a 72S9A8J5GW
|2 NLM
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|a Richards, Jeffrey T
|e verfasserin
|4 aut
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|a Wheeler, Raymond M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 166(2009), 9 vom: 01. Juni, Seite 903-13
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:166
|g year:2009
|g number:9
|g day:01
|g month:06
|g pages:903-13
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|u http://dx.doi.org/10.1016/j.jplph.2008.11.006
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