Cl⊖ and K⊕ uptake by cells of variegated leaves of Oenothera and Tradescantia having normal and mutated chloroplasts, respectively, have been investigated. Under our conditions light has no effect on ion uptake. Cl⊖ uptake is highly sensitive to FCCP in both green and mutated cells, while K⊕ uptake is inhibited only in the green cells. Rates of ion uptake are higher in the green than in the mutated cells. The results allow two alternative explanations: (I) mutation may affect carrier-proteins and hence alter ion accumulation capacity of the cells; (II) light-independent metabolically controlled ion accumulation may be correlated with chloroplast differentiation.
Dynamics of Chloroplast Translation during Chloroplast Differentiation in Maize
