Influence of NaCl on Growth, Proline, and Phosphoenolpyruvate Carboxylase Levels in Mesembryanthemum crystallinum Suspension Cultures
نویسندگان
چکیده
منابع مشابه
Nucleotide sequence of the Ppc2 gene encoding a housekeeping isoform of phosphoenolpyruvate carboxylase from Mesembryanthemum crystallinum.
The gene encoding a housekeeping form of phospboenolpyruvate carboxylase (EC 4.1.1.31), was isolated from a genomic library of total DNA of Mesembryanthemum crystallinum cloned into Lambda FIX (1) using a cDNA probe specific for the CAM (Crassulacean acid metabolism) form of the enzyme (2). This gene, designated Ppc2, is present as a single copy on the Af crystallinum genome. Unlike Ppcl, the e...
متن کاملEnvironmental Control of Phosphoenolpyruvate Carboxylase Induction in Mature Mesembryanthemum crystallinum L.
Mesembryanthemum crystallinum L. plants shift the mode of carbon assimilation from C(3) to Crassulacean acid metabolism when stressed by high salinity. A prerequisite for Crassulacean acid metabolism induction is the synthesis of phosphoenolpyruvate carboxylase (PEPCase). A moderate increase in the abundance of PEPCase transcripts and activity is observed in 7-week-old, well-watered plants. Thi...
متن کاملSalt Stress Increases the Level of Translatable mRNA for Phosphoenolpyruvate Carboxylase in Mesembryanthemum crystallinum.
Mesembryanthemum crystallinum responds to salt stress by switching from C(3) photosynthesis to Crassulacean acid metabolism (CAM). During this transition the activity of phosphoenolpyruvate carboxylase (PEPCase) increases in soluble protein extracts from leaf tissue. We monitored CAM induction in plants irrigated with 0.5 molar NaCl for 5 days during the fourth, fifth, and sixth week after germ...
متن کاملRegulation of Phosphoenolpyruvate Carboxylase and Crassulacean Acid Metabolism Induction in Mesembryanthemum crystallinum L. by Cytokinin : Modulation of Leaf Gene Expression by Roots?
Phosphoenolpyruvate carboxylase (PEPCase), the key enzyme of Crassulacean acid metabolism, is induced by water stress in leaves of Mesembryanthemum crystallinum. In water-stressed plants or excised leaves, exogenous cytokinin suppresses PEPCase transcript accumulation in the leaves. Cytokinin (6-benzylaminopurine) used in concentrations from 5 to 500 micromolar (a) inhibits the upregulation of ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1992
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.98.2.626