photosynthetic characteristics and induction of crassulacean acid metabolism (cam) by drought stress were investigated in sedum album, sedum stoloniferum and rosularia elymaitica from crassulaceae. titratable acidity, malate content, phosphoenolpyruvate carboxylase (pepc) activity and gas exchange parameters were determined in plants at the end and beginning of the photoperiod. results showed t...

photosynthetic characteristics and induction of crassulacean acid metabolism (cam) by drought stress were investigated in sedum album, sedum stoloniferum and rosularia elymaitica from crassulaceae. titratable acidity, malate content, phosphoenolpyruvate carboxylase (pepc) activity and gas exchange parameters were determined in plants at the end and beginning of the photoperiod. results showed t...

Crassulacean acid metabolism (CAM), one of three kinds photosynthesis, is a water-use efficient adaptation to an arid environment. CAM characterized by CO2 uptake via open stomata during the nighttime and refixation Calvin cycle daytime. Facultative plants can shift photosynthesis from C3 exhibit greater plasticity in expression under different environments. Though leaf thickness important anat...

Agaves exhibit the water-conserving crassulacean acid metabolism (CAM) photosynthetic pathway. Some species are potential biofuel feedstocks because they are highly productive in seasonally dry landscapes. In plants with CAM, high growth rates are often believed to be associated with a significant contribution of C3 photosynthesis to total carbon gain when conditions are favourable. There has e...

Photosynthetic characteristics and induction of crassulacean acid metabolism (CAM) by drought stress were investigated in Sedum album, Sedum stoloniferum and Rosularia elymaitica from Crassulaceae. Titratable acidity, malate content, phosphoenolpyruvate carboxylase (PEPC) activity and gas exchange parameters were determined in plants at the end and beginning of the photoperiod. Results showed t...

By measuring titratable acidity, gas exchange parameters, mesophyli succulence, and lSC/UC ratios, we have shown that Cissus quadrgudaris L. has C3-like leaves and stems with Crassulacean acid metabolsm (CAM). In addition, the nonsucculent leaves show the diurnal fluctuations in organic acids termed recycling despite the fact that all CO2 uptake and stomatal opening occurs during the day. Young...

While the majority of plants use the typical C3 carbon metabolic pathway, ~6% of angiosperms have adapted to carbon limitation as a result of water stress by employing a modified form of photosynthesis known as Crassulacean acid metabolism (CAM). CAM plants concentrate carbon in the cells by temporally separating atmospheric carbon acquisition from fixation into carbohydrates. CAM has been stud...

Facultative crassulacean acid metabolism (CAM) describes the optional use of CAM photosynthesis, typically under conditions of drought stress, in plants that otherwise employ C3 or C4 photosynthesis. In its cleanest form, the upregulation of CAM is fully reversible upon removal of stress. Reversibility distinguishes facultative CAM from ontogenetically programmed unidirectional C3-to-CAM shifts...

Clusia minor L., a C3-CAM intermediate, and Clusia multiflora H. B. K., a C3 obligate, present two physiotypes of a similar morphotype occurring sympatrically in the field. Both species, exposed 2 days to high light, show similar responses to this kind of stress: (i) the level of xanthophyll pigments in tested plants during the daycourse adapts to stress, (ii) the levels of antheraxanthin and z...

Global climate change and population growth are persistently posing threats to natural resources (e.g., freshwater) agricultural production. Crassulacean acid metabolism (CAM) evolved from C3 photosynthesis as an adaptive form of in hot arid regions. It features the nocturnal opening stomata for CO2 assimilation, diurnal closure water conservation, high water-use efficiency. To cope with global...