Effect of CO2 Concentration on Growth, Carbon Distribution and Loss of Carbon from the Roots of Maize |
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Authors: | WHIPPS J M |
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Abstract: | The effects of three ranges of CO2 concentration on growth,carbon distribution and loss of carbon from the roots of maizegrown for 14 d and 28 d with shoots in constant specific activity14CO2 are described. Increasing concentrations of CO2 led toenhancement of plant growth with the relative growth rate (RGR)of the roots affected more than the RGR of the shoots. Between16% and 21% of total net fixed carbon (defined as 14C retainedin the plant plus 14C lost from the root) was lost from theroots at all CO2 concentrations at all times but the amountsof carbon lost per unit weight of plant decreased with time.Possible mechanisms to account for these observations are discussed. Key words: Growth, Roots, Carbon loss, CO2] |
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