Effect of osmotic stress on carbon metabolism in Chlamydomonas reinhardtii: accumulation of glycerol as an osmoregulatory solute

• Published in: Plant physiology (Bethesda) Vol. 82; no. 2; pp. 594 - 596
• Main Authors: Husic, H.D, Tolbert, N.E
• Format: Journal Article
• Language: English
• Published: Rockville, MD American Society of Plant Physiologists 01.10.1986
• Subjects: ACIDE ORGANIQUE; ACIDOS ORGANICOS; ALGAE; ALGUE; ALMIDON; AMIDON; Biological and medical sciences; CARBOHIDRATOS; CARBOHYDRATES; CARBON; CARBONE; CARBONO; CICLO BIOGEOQUIMICO; Communications; CYCLE BIOGEOCHIMIQUE; CYCLING; Dunaliella; Excretion; FOSFATOS; FOTOSINTESIS; Fundamental and applied biological sciences. Psychology; GLICEROL; GLUCIDE; GLYCEROL; GLYCOLATES; LACTATE; LACTATES; LACTATOS; METABOLISM; METABOLISME; METABOLISMO; ORGANIC ACIDS; Phosphatases; PHOSPHATE; PHOSPHATES; PHOTOSYNTHESE; PHOTOSYNTHESIS; Plant physiology and development; Plants; REGIME HYDRIQUE DU SOL; REGIMEN HIDRICO DEL SUELO; SALINIDAD; SALINITE; SALINITY; Salts; SOIL WATER REGIMES; Solutes; STARCH; Sugar phosphates; TRANSLOCACION; TRANSLOCATION; Water and solutes. Absorption, translocation and permeability; Freshwater environment; Photorespiration; Algae; Chlorophycophyta; Glycerol; Osmoregulation; Photosynthesis; Thallophyta; Salinity
• ISSN: 0032-0889; 1532-2548
• DOI: 10.1104/pp.82.2.594

NaCl, KCl, and sucrose at equiosmolar concentrations had similar inhibitory effects on photosynthetic carbon metabolism by the freshwater green alga, Chlamydomonas reinhardtii. Inhibitory concentrations of these solutes altered the products of photosynthetic 14CO2 incorporation, resulting in reduced incorporation into starch, sugar phosphates, lactate, and glycolate, but caused an accumulation of glycerol both intracellularly and in the medium.