Abstract
Callus and cell suspension cultures of cowpea (Vigna unguiculata) were induced with 2,4-dichlorophenoxyacetic acid and grown at different NaCl concentrations. The cell biomass yield and its total lipid content decreased with increasing salinity. However, while the hexose content in lipids was higher, the amount of lipid phosphorus was significantly lower in both agar and cell suspension cultures. Ion-transport rates with artificial membranes prepared with different lipid fractions showed that lipids from cells grown in a saline medium were less permeable to Na+ and to Cl- than those grown in a non-saline medium. Also the permeability of membranes prepared with glycolipids was lower than those prepared with phospholipids and whole lipids. Apparently, the increase of hexose/phosphorus ratio in membrane lipids is induced in response to the halo-adaptation process.
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Vazquez-Duhalt, R., Alcaraz-Meléndez, L. & Greppin, H. Variation in polar-group content in lipids of cowpea (Vigna unguiculata) Cell cultures as a mechanism of haloadaptation. Plant Cell Tiss Organ Cult 26, 83–88 (1991). https://doi.org/10.1007/BF00036110
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DOI: https://doi.org/10.1007/BF00036110