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Pyruvate uptake induced by a pH jump in mesophyll chloroplasts of maize and sorghum, NADP-malic enzyme type C4 species



Pyruvate uptake induced by a pH jump in mesophyll chloroplasts of maize and sorghum, NADP-malic enzyme type C4 species



FEBS Letters 269(1): 122-124



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 C4 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 C4 species is primarily driven by the proton gradient across the envelope.

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Accession: 002200076

Download citation: RISBibTeXText

PMID: 2387391

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


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