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Light modulation of glyceraldehyde-3-phosphate dehydrogenase and glucose-6-phosphate dehydrogenase by photosynthetic electron flow in pea chloroplasts

Journal Article · · Plant Physiol.; (United States)
DOI:https://doi.org/10.1104/pp.67.2.197· OSTI ID:6462871
Light activation of NADP-linked glyceraldehyde-3-P dehydrogenase (EC 1.2.1.13) and light inactivation of glucose-6-P dehydrogenase (EC 1.1.1.49) appear to be modulated within pea leaf chloroplasts by mediators which are reduced by photosynthetic electron flow from the photosystem I reaction center. Dichlorophenyl-1,1-dimethylurea inhibition of this modulation can be completely reversed by ascorbate plus 2,6-dichlorophenolindophenol in broken chloroplasts, but not in intact chloroplasts. Intact chloroplasts are impermeable to 2,6-dichlorophenolindophenol at pH 7.5. Studies on the effect of light in reconstituted chloroplasts with photosystem I-enriched particles in the place of whole thylakoids revealed that photosystem I participants in the light modulation of NADP-linked glyceraldehyde-3-P dehydrogenase and of glucose-6-P dehydrogenase.
Research Organization:
Univ. of Illinois, Chicago
OSTI ID:
6462871
Journal Information:
Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 67:2; ISSN PLPHA
Country of Publication:
United States
Language:
English