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Título

Photosynthesis, carbohydrate levels and chlorophyll fluorescence-estimated intercellular CO2 in water stressed Casuarina equisetifolia Forst. & Forst.

AutorSánchez-Rodríguez, J.; Pérez Pérez, Pilar ; Martínez-Carrasco, Rafael
Palabras claveCarbohydrates
Carbon metabolism
Chlorophyll fluorescence
Photosynthesis
Stomatal conductance
Water stress
Fecha de publicación1999
EditorJohn Wiley & Sons
CitaciónPlant, Cell and Environment (1999) 22, 867–873
ResumenThe effect of long-term water stress on photosynthetic carbon metabolism in Casuarina equisetifolia Forst. & Forst. was analysed by measuring CO2 assimilation, stomatal conductance, the quantum yield of photosystem II (FPSII), enzyme activities, and the levels of photosynthetic intermediates and carbohydrates. CO2 assimilation decreased under water stress while the intercellular CO2 concentration (Ci) as estimated by gas exchange measurements remained high. However, the estimates of Ci from measurements of FPSII suggest that the decrease in photosynthesis can be explained in terms of stomatal closure. Water stress decreased total stromal fructose-1,6-bisphosphatase activity and did not alter the activities and activation states of ribulose bisphosphate carboxylase oxygenase and NADP-dependent malate dehydrogenase (NADP-MDH). The concentration of photosynthetic metabolites, glucose, fructose and sucrose decreased, whereas starch concentrations increased under drought conditions.
Versión del editorhttp://www3.interscience.wiley.com/cgi-bin/fulltext/119087653/PDFSTART
URI10261/21200
DOI10.1046/j.1365-3040.1999.00447.x
ISSN0140-7791
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