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The influence of salinity on phosphate uptake and distribution in lupin roots
Author(s) -
Treeby Michael T.,
Steveninck Reinhard F. M.
Publication year - 1988
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1988.tb09172.x
Subject(s) - phosphate , vacuole , stele , salinity , shoot , salt (chemistry) , botany , biology , chemistry , horticulture , cytoplasm , biochemistry , ecology
Treeby, M. T. and van Steveninck, R. F. M. 1988. The influence of salinity on phosphate uptake and distribution in lupin roots. ‐ Physiol. Plant. 72: 617–622. The uptake and distribution of phosphate in lupin ( Lupinus luteus L. cv. Weiko III) roots under moderate salt (NaCl) stress was studied. Vacuolar inorganic phosphate (PJ concentrations in high phosphate plants were decreased by salt, although whole root P| was unaffected. In low phosphate plants, vacuolar P i was unaffected by salt while whole root P i was increased. Phosphate uptake was not altered by salt in high phosphate plants, but was depressed in low phosphate plants. These observations lead to the conclusion that in high phosphate plants P i accumulates in cytoplasm and/or stele, ultimately giving rise to phosphate toxicity in shoots. Increasing phosphate supply had no effect on Na + accumulation in root cell vacuoles in the epidermis or cortex, but the concentration of Cl − in endodermal vacuoles was lowered.