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- W170917995 abstract "Net carbon exchange rates (NCE), starch accumulation rates, gas exchange, and the maximum amount of carbon available for export were studied in Beta vulgaris L. following a 25% increase or a 25% decrease in ambient CO/sub 2/ (340 ..mu..l/L). Changing CO/sub 2/ by 25% above or below ambient had no effect on the ratio of internal CO/sub 2/ to ambient CO/sub 2/. Stomatal aperature adjusted in both cases to maintain the same relative stomatal limitation to NCE. Increasing CO/sub 2/ 25% increased NCE and water use efficiency, but slightly decreased stomatal conductance by 9% below leaves maintained at ambient. In contrast, a 25% reduction in CO/sub 2/ decreased NCE and water use efficiency. Decreasing CO/sub 2/ caused an increase in conductance also by 9%. Increasing CO/sub 2/ increased starch storage by 36%, but caused no change in the ratio of starch accumulation to NCE. A reduction in CO/sub 2/ caused a 60% decrease in the rate of starch storage and decreased the ratio of starch accumulation to NCE by one-half. The maximum amount of carbon available for export was increased 25% by increasing CO/sub 2/, but decreased by 5% following a reduction in CO2 level. These data are evidence thatmore » export rates are maintained at the expense of starch synthesis during periods of low NCE.« less" @default.
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- W170917995 date "1987-04-01" @default.
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- W170917995 title "Carbon assimilation and export in sugar beet leaves. [Beta vulgaris]" @default.
- W170917995 hasPublicationYear "1987" @default.
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