Abstract

RAYA-PEREZ, J. C.  and  AGUIRRE-MANCILLA, C. L.. Appearance and evolution of C₄ photosynthesis. Rev. Chapingo ser. cienc. for. ambient [online]. 2008, vol.14, n.1, pp.45-50. ISSN 2007-4018.

The photosynthesis type C₄ had its origin 7-5 millions years ago in several genera of plants. The atmospheric diminution of CO₂ concentration leads to a concentrative mechanism. Some studies of genes and enzymes than participate in this pathway shown several changes than have occurred in DNA and proteins in order to adapt them for a new function, CO₂ concentrating mechanism. This mechanism avoid Rubisco's oxygenase function.

Keywords : photosynthesis; malic enzyme; phosphoenolpyruvate carboxylase; pyruvate ortophosphate dikinase; malate dehydrogenase; Flaveria; Amaranthus; Zea mays.

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