Regulation of RuBP carboxylase activity associated with photo-inhibition of wheat

A - Papers appearing in refereed journals

Boyle, F. A. and Keys, A. J. 1982. Regulation of RuBP carboxylase activity associated with photo-inhibition of wheat. Photosynthesis Research. 3 (2), pp. 105-111. https://doi.org/10.1007/BF00040708

AuthorsBoyle, F. A. and Keys, A. J.
Abstract

Detached wheat leaves were illuminated in air until a steady rate of photosynthesis was established. Then the gas was changed to 1% O2, 99% N2 and after 2.5 h further illumination the capacity of the leaves for photosynthesis in air was decreased to approximately 50%. Measurement of RuBP carboxylase activity in extracts showed that inhibition of photosynthesis was accompanied by 70% inactivation of this enzyme. The capacity for photosynthesis and the activity of RuBP carboxylase were recovered when leaves were returned to normal air. Extracts of the leaves made when photosynthesis and carboxylase activity were low, recovered most of the lost carboxylase activity when supplemented with bicarbonate and magnesium ions. The time courses for activation and inactivation of the RuBP carboxylase in these experiments suggests the operation of a mechanism that has not yet been elucidated.
RESP-8500

Year of Publication1982
JournalPhotosynthesis Research
Journal citation3 (2), pp. 105-111
Digital Object Identifier (DOI)https://doi.org/10.1007/BF00040708
Web address (URL)https://doi.org/10.1007/BF00040708
Open accessPublished as non-open access
ISSN0166-8595
PublisherSpringer

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