The role of crassulacean acid metabolism (CAM) in the adaptation of plants to salinity

Two case studies are presented illustrating how the behaviour of plants using crassulacean acid metabolism (CAM) provides adaptation to salinity. Perennial cacti having constitutive CAM show adaptation at the whole-plant level, engaging regulation of stomata, internal CO2 -recycling and root physiol...

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Veröffentlicht in:The New phytologist. - 1984. - 125(1993), 1 vom: 25. Sept., Seite 59-71
1. Verfasser: Lüttge, Ulrich (VerfasserIn)
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1993
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Cacti Mesembryanthemum crystallinum V0V1-ATPase crassulacean acid metabolism gas exchange phosphoenolpyruvate carboxylase pyruvate-phosphate dikinase salinity tonoplast turgor
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520 |a Two case studies are presented illustrating how the behaviour of plants using crassulacean acid metabolism (CAM) provides adaptation to salinity. Perennial cacti having constitutive CAM show adaptation at the whole-plant level, engaging regulation of stomata, internal CO2 -recycling and root physiology with salt exclusion. They are stress avoiders. Annual plants such as Mesembryanthemum crystallinum, with inducible CAM, are salt includers. They are stress-tolerant and show reactions at an array of levels: (i) regulation of turgor and gas exchange at the whole-plant level; (ii) metabolic adjustments at the cellular level; (iii) adapptive transport proteins at the membrane level and also (iv) at the macromolecular level; and (v) inductive changes at the gene expression level of the enzyme complement for metabolism (in particular involving glycolysis and malic-acid synthesis with phosphoenolpyruvate carboxylase (PEPC) as the key enzyme, and gluconeogenesis (with pyruvate-phosphate dikinase (PPDK) as a key enzyme) and membrane transport (in particular involving the tonoplast ATPase) 
650 4 |a Journal Article 
650 4 |a Cacti 
650 4 |a Mesembryanthemum crystallinum 
650 4 |a V0V1-ATPase 
650 4 |a crassulacean acid metabolism 
650 4 |a gas exchange 
650 4 |a phosphoenolpyruvate carboxylase 
650 4 |a pyruvate-phosphate dikinase 
650 4 |a salinity 
650 4 |a tonoplast 
650 4 |a turgor 
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