Chloroplast ion channels affect photosynthetic efficiency

Does Chloroplast Size Influence Photosynthetic Nitrogen Use Efficiency?

High nitrogen (N) supply frequently results in a decreased photosynthetic N-use efficiency (PNUE), which indicates a less efficient use of accumulated Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). Chloroplasts are the location of Rubisco and the endpoint of CO2 diffusion, and they play a vital important role in photosynthesis. However, the effects of chloroplast development on phot...

Uncouplers of Spinach Chloroplast Photosynthetic

tion at pH 5.5 resulted in preferential destruction of IC photoreduction ability. 4. Addition of zinc ion preferentially inhibited the photooxidation of ascorbic acid. 5. Treatment of chloroplasts with digitonin resulted in a drastic loss of ability to catalyze the Hill reaction and IC photoreduction, yet yielded a preparation which was over 6 times as active in terms of ascorbic acid photooxid...

Isolation and bicarbonate transport of chloroplast envelope membranes from species of differing net photosynthetic efficiency.

A three-phase discontinuous sucrose gradient yielded two fractions of chloroplast envelope membranes from spinach (Spinacia oleracea L.), sunflower (Helianthus annuus L.), and maize (Zea mays L., mesophyll and undifferentiated chloroplasts). These species were selected to represent plants with fast photorespiration and slow net photosynthesis, fast photorespiration yet fast net photosynthesis, ...

O 13: Ion Channels in Autoimmune Neurodegeneration

Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system characterized by widespread inflammation, focal demyelination and a variable degree of axonal and neuronal loss. Ionic conductances regulate T cell activation as well as neuronal function and thus have been found to play a crucial role in MS pathogenesis. Since present therapeutical approaches are only parti...

Uncouplers of Spinach Chloroplast Photosynthetic Phosphorylation.