Abstract
Abstract Application of 10 mM urea to the flag leaf of wheat plants enhanced in vivo urease activity several fold. Photosynthetic rate was also increased considerably. There were significant differences in the leaf internal carbon dioxide (CO2) concentrations between the urea‐treated and untreated leaves. The finding that carbon (14C) was detected in the ethanol extract of the leaves fed with 14C‐urea suggests that CO2 released from urea is re‐fixed by the leaves.
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