Cissus quadrangularis, Vitacea, has a succulent stem and shows Crassulacean Acid Metabolism (CAM). Environmental control of CAM is shown with respect to water supply, day temperature, and light intensity. C. quadrangularis, under moderate drought, has a high capacity for dark CO2 fixation and high efficiency of water use (nocturnal transpiration ratio = 8). Severely droughted plants of C. quadrangularis still show dark CO2 fixation although at a reduced rate, which allows a maintenance level metabolism. On the other hand, high temperature and light intensity promote CAM activity in well-watered plants resulting in luxuriant and fast growth. Data indicate that under natural conditions CAM should effectively contribute to the successful adaptation of C. quadrangularis to its environment. © 1980 Oxford University Press.
Environmental influences on CAM activity of cissus quadrangularis
FIORETTO, Antonietta
1980
Abstract
Cissus quadrangularis, Vitacea, has a succulent stem and shows Crassulacean Acid Metabolism (CAM). Environmental control of CAM is shown with respect to water supply, day temperature, and light intensity. C. quadrangularis, under moderate drought, has a high capacity for dark CO2 fixation and high efficiency of water use (nocturnal transpiration ratio = 8). Severely droughted plants of C. quadrangularis still show dark CO2 fixation although at a reduced rate, which allows a maintenance level metabolism. On the other hand, high temperature and light intensity promote CAM activity in well-watered plants resulting in luxuriant and fast growth. Data indicate that under natural conditions CAM should effectively contribute to the successful adaptation of C. quadrangularis to its environment. © 1980 Oxford University Press.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
