Enhanced Net K+ Uptake Capacity of NaCl-Adapted Cells
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چکیده
منابع مشابه
Enhanced Net K Uptake Capacity of NaCl-Adapted Cells.
Maintenance of intracellular K(+) concentrations that are not growth-limiting, in an environment of high Na(+), is characteristic of NaCl-adapted cells of the glycophyte, tobacco (Nicotiana tabacum/gossii). These cells exhibited a substantially greater uptake of (86)Rb(+) (i.e. an indicator of K(+)) relative to unadapted cells. Potassium uptake into NaCl-adapted cells was 1.5-fold greater than ...
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Cells of Nicotiana tabacum L. var Wisconsin 38 adapted to NaCl (up to 428 millimolar) which have undergone extensive osmotic adjustment accumulated Na(+) and Cl(-) as principal solutes for this adjustment. Although the intracellular concentrations of Na(+) and Cl(-) correlated well with the level of adaptation, these ions apparently did not contribute to the osmotic adjustment which occurred du...
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Carbon use efficiencies (gram cell organic dry weight accumulated per gram sugar assimilated from the medium) of unadapted and NaCl-adapted (428 millimolar) cells of tobacco (Nicotiana tabacum L. var Wisconsin 38) were determined to evaluate metabolic costs associated with growth and survival in a saline environment. No net increase in carbon costs was associated with salt adaptation. At low su...
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Tonoplast enriched membrane vesicle fractions were isolated from unadapted and NaCl (428 millimolar) adapted tobacco cells (Nicotiana tabacum L. var Wisconsin 38). Polypeptides from the tonoplast enriched vesicle fractions were separated by SDS-PAGE and analyzed by Western blots using polyclonal antibodies to the 70 kilodalton subunit of the red beet tonoplast H(+)-ATPase. These antibodies cros...
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Addition of 100 millimolar KCl, NaCl, or Na(2)SO(4) strongly promoted acidification of the medium by cells of Nicotiana tabacum/gossii in suspension culture. Acidification was greater in the case of NaCl-adapted than in that of wild type cells, and strikingly so in KCl medium when fusicoccin (FC) was present. Back-titration indicated that net proton secretion in KCl medium was increased 4-fold ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1991
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.95.4.1265