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STIMULATION OF PHOTOSYNTHETIC STARCH FORMATION BY SEQUESTRATION OF CYTOPLASMIC ORTHOPHOSPHATE
Author(s) -
SHEUHWA CHENSHE,
LEWIS D. H.,
WALKER D. A.
Publication year - 1975
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1975.tb02625.x
Subject(s) - mannose , starch , photosynthesis , spinach , phosphate , stimulation , chemistry , cytoplasm , chloroplast , biochemistry , botany , biology , neuroscience , gene
SUMMARY Photosynthetic starch formation in leaf discs of spinach beet and related species can be increased more than ten fold by the presence of exogenous mannose at 10 −2 M. In these species, carbon from mannose is not incorporated into starch to a significant extent and the stimulation is believed to be an indirect effect resulting from the sequestration of cytoplasmic ortho‐phosphate as mannose phosphate. In species such as tobacco, there is substantial incorporation of carbon from mannose into starch and into soluble compounds other than mannose‐6‐phos‐phate.
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