Jack R. Mauney

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The cotton (Gossypium hirsutum L.) plant responds to a doubling of atmospheric CO2 with almost doubled yield. Gas exchange of leaves was monitored to discover the photosynthetic basis of this large response. Plants were grown in the field in open-top chambers with ambient (nominally 350 μl/l) or enriched (nominally either 500 or 650 μl/l) concentrations of(More)
The increasing atmospheric CO2 concentration probably will have significant direct effects on vegetation whether predicted changes in climate occur or not. Averaging over many prior greenhouse and growth chamber studies, plant growth and yield have typically increased more than 30% with a doubling of CO2 concentration. Such a doubling also causes stomatal(More)
Some evidence indicates that photosynthetic rate (A) and stomatal conductance (g) of leaves are correlated across diverse environments. The correlation between A and g has led to the postulation of a "messenger" from the mesophyll that directs stomatal behavior. Because A is a function of intercellular CO(2) concentration (c(i)), which is in turn a function(More)
This paper will present and discuss some basic physiological effects of nitrogen (N) nutrition in the cotton plant. The general thesis will be that N deficiency generates several related, yet discrete and experimentally identifiable, effects. Overall, these effects are integrated at the whole-plant level to produce systematic alterations in growth, yield,(More)
Cotton (Gossypium hirsutum L.) was grown in Phoenix, AZ, in 1981 and 1982. In both years it was irrigated with either 10 or 15 cm of water per application; N was supplied at three rates within each water treatment. Stomatal conductances of the most recently expanded leaves were followed during irrigation cycles to determine effects of N fertility on(More)
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