Response of Carbon Dioxide Fixation to Water Stress: Parallel Measurements on Isolated Chloroplasts and Intact Spinach Leaves 1

AUTOR(ES)

Plaut, Z.

RESUMO

Application of water stress to isolated spinach (Spinacia oleracea) chloroplasts by redutcion of the osmotic potentials of CO2 fixation media below −6 to −8 bars resulted in decreased rates of fixation regardless of solute composition. A decrease in CO2 fixation rate of isolated chloroplasts was also found when leaves were dehydrated in air prior to chloroplast isolation. An inverse response of CO2 fixation to osmotic potential of the fixation medium was found with chloroplasts isolated from dehydrated leaves—namely, fixation rate was inhibited at −8 bars, compared with −16 or −24 bars.

Documentos Relacionados

• Effects of Glycidate on Carbon Dioxide Fixation with Isolated Spinach Chloroplasts 1
• Inhibition of Photosynthetic Carbon Dioxide Fixation in Isolated Spinach Chloroplasts Exposed to Reduced Osmotic Potentials 1
• Carbon Dioxide Assimilation by Leaves, Isolated Chloroplasts, and Ribulose Bisphosphate Carboxylase from Spinach 1
• Carbon Dioxide Fixation in the Light and in the Dark by Isolated Spinach Chloroplasts 1
• Factors Affecting Light Induced Fixation of Carbon Dioxide by Isolated Spinach Chloroplasts. 12