Photocontrol of Sorghum Leaf Phosphoenolpyruvate Carboxylase | Zendy

Martine Thomas | Zendy; Claude Crétin | Zendy; Eliane Keryer | Zendy; Jean Vidal | Zendy; Pierre Gadal | Zendy

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Photocontrol of Sorghum Leaf Phosphoenolpyruvate Carboxylase

Author(s) -

Martine Thomas,

Claude Crétin,

Eliane Keryer,

Jean Vidal,

Pierre Gadal

Publication year - 1987

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.85.1.243

Subject(s) - phosphoenolpyruvate carboxylase , sorghum , chemistry , botany , phosphoenolpyruvate carboxykinase , biology , biochemistry , agronomy , enzyme

The mechanism underlying the light effect on phosphoenolpyruvate carboxylase (PEPC) from the C(4) plant sorghum (Sorghum vulgare Pers., var Tamaran) leaves was investigated. Following exposure to light a new isozyme of PEPC, specific for the green leaf and responsible for primary CO(2) fixation in photosynthesis, was established. Northern blot experiments revealed the presence of PEPC mRNA showing a molecular weight of 3.4 kilobases. During the greening process, concomitant to enzyme activity, PEPC protein and PEPC messenger RNA amounts increased considerably. This photoresponse was shown to be under phytochrome control.

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