Pyruvate uptake induced by a pH jump in mesophyll chloroplasts of maize and sorghum, NADP‐malic enzyme type C 4  species | Zendy

Ohnishi Jun-ichi | Zendy; Kanai Ryuzi | Zendy

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Pyruvate uptake induced by a pH jump in mesophyll chloroplasts of maize and sorghum, NADP‐malic enzyme type C 4 species

Author(s) -

Ohnishi Jun-ichi,

Kanai Ryuzi

Publication year - 1990

Publication title -

febs letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.593

H-Index - 257

eISSN - 1873-3468

pISSN - 0014-5793

DOI - 10.1016/0014-5793(90)81134-a

Subject(s) - sorghum , malic enzyme , chemistry , c4 photosynthesis , enzyme , chloroplast , malic acid , botany , agronomy , biology , biochemistry , dehydrogenase , gene , citric acid

A sudden pH decrease (pH jump) of the medium enhanced pyruvate uptake in the dark in mesophyll chloroplasts (MCp) of Zea mays and Sorghum bicolor , NADP‐malic enzyme type C 4 plants, while it was reported that a Na + jump enhanced pyruvate uptake in MCp of P. miliaceum , a NAD‐malic enzyme type [(1987) FEBS Lett. 219, 347]. The enhancement effect of the pH jump decayed completely in 5 min and the decay was accelerated by proton gradient‐collapsing reagents. The results suggest that active pyruvate uptake into MCp of NADP‐malic enzyme type C 4 species is primarily driven by the proton gradient across the envelope.

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