Evidence for Activation of the Oxidative Pentose Phosphate Pathway during Photosynthetic Assimilation of NO(3) but Not NH(4) by a Green Alga |
| |
Authors: | Huppe H C Vanlerberghe G C Turpin D H |
| |
Affiliation: | Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4. |
| |
Abstract: | Addition of NO3− to N-limited Selenastrum minutum during photosynthesis resulted in an immediate drop in the NADPH/NADP ratio and a slower increase of the NADH/NAD ratio. These changes were accompanied by a rapid decrease in glucose-6-phosphate and increase in 6-phosphogluconate, indicating activation of glucose-6-phosphate dehydrogenase and a role for the oxidation pentose phosphate pathway during photosynthetic NO3− assimilation. In contrast, the short-term changes in pyridine nucleotides and metabolites during photosynthetic assimilation of NH4+ were not consistent with a stimulation of the oxidative pentose phosphate pathway. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|