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A full understanding of the central role of P i in photosynthesis requires information on the size of the endogenous P i pools and the extent to which they interact with each other under different physiological conditions. In vivo 31 P-NMR spectroscopy has the potential to assist in this objective but the early applications of this technique to leaf tissues were disappointing. Here we report 31 P-NMR data from maize and tomato leaf discs that: (i) cast doubt on earlier estimates of the cytoplasmic orthophosphate pool size; and (ii) prove that exogenously supplied D-mannose can reduce the cytoplasmic P i level in some circumstances. © 1989.

Original publication

DOI

10.1016/0014-5793(89)80485-5

Type

Journal article

Journal

FEBS Letters

Publication Date

02/01/1989

Volume

242

Pages

279 - 284