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Science 19 July 1968:
Vol. 161. no. 3838, pp. 281 - 283
DOI: 10.1126/science.161.3838.281
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Articles

Carbon Dioxide Exchange in Cotton: Some Anomalous Fluctuations

J. H. Troughton 1 and I. R. Cowan 1

1 Division of Land Research, Commonwealth Scientific and Industrial Research Organization, Canberra, Australia

Anomalous depressions in carbon dioxide exchange were observed in cotton leaves that were exhibiting oscillations in transpiration under controlled conditions of environment. The depressions occurred only when leaf temperature exceeded 37.5°C and when the leaf diffusive resistance was minimum. Stomatal control of the supply of carbon dioxide to the leaf does not seem to be implicated in the effect.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)