Plant Physiol.
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Plant Physiology 58:573-575 (1976)
© 1976 American Society of Plant Biologists

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Photorespiration in C3 and C4 Plant Tissue Cultures

Significance of Kranz Anatomy to Low Photorespiration in C4 Plants 1

Robert A. Kennedy

a Department of Botany, University of Iowa, Iowa City, Iowa 52242

Photorespiration rates in tissue cultures of a C4 plant, Portulaca oleracea, were compared to those in tissue cultures of a C3 plant, Streptanthus tortuosus. The C4 plant tissue cultures have one-half to one-third the photorespiration rate of the C3 plant tissue cultures and respond to varying O2 concentrations in a manner typical of C4 plants. The results suggest that the lack of detectable photorespiration in C4 plants is not related to leaf anatomy.

1 This work was supported by National Science Foundation Grant BMS-75-09931.




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P. R. Day
Plant Genetics: Increasing Crop Yield
Science, September 30, 1977; 197(4311): 1334 - 1339.
[Abstract] [PDF]


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Copyright © 1976 by the American Society of Plant Biologists