Abstract
Foliar inorganic ion and carbohydrate concentrations were determined in wheat plants treated with factorial combinations of phosphorus fertilizer and NaCl in a glasshouse experiment. Growth reductions and visual symptoms of salt toxicity were minimized when phosphorus nutrition was adequate, and were intensified by phosphorus deficiency. Foliar sodium and chloride accumulated up to 4.0–5.5% d.w. with salinity treatment. However, ionic concentrations within corresponding leaves or distributions between leaves of plants with different phosphorus treatments were not influenced by phosphorus treatment and had no relationship to the severity of salt toxicity symptoms. This suggests that phosphorus deficiency reduced the cellular tolerance for ion accumulation. A combination of phosphorus deficiency and salinity induced an accumulation of foliar starch and sucrose despite substantial reductions in net CO2 assimilation rates. This accumulation did not occur if phosphorus nutrition was adequate, which is consistent with the roles of phosphorus in carbohydrate metabolism. It is proposed that adequate phosphorus nutrition is essential for effective ion compartmentation by contributing to efficient carbohydrate utilization in salt-stressed wheat.
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References
Abbott T S (Ed) 1985 Soil testing service — methods and interpretation. Dept. Agric. NSW. 87 pp.
Awad A S 1986 Phosphorus Enhancement of Salt Tolerance of Tomato Plants. PhD Thesis, University of Queensland.
Bergmeyer H U and Bernt E 1974 Sucrose.In Methods of Enzymic Analysis, vol 3. Ed. H U Bergmeyer. pp 1176–1179. Academic Press Inc. New York.
Bernstein L, Francois L E and Clark R A 1974 Interactive effects of salinity and fertility on yields of grains and vegetables. Agron. J. 66, 412–421.
Bieleski R L and Ferguson I B 1983 Physiology and metabolism of phosphate and its compounds.In Encyclopedia of Plant Physiology, New Series, vol 15. Eds. A Lauchli and R L Bieleski. pp 4422–4499. Springer-Verlag, Berlin.
Blakeney A B and Matheson N K 1984 Some properties of the stem and pollen starches of rice. Starch 36, 265–269.
Cerda A and Bingham F T 1978 Yield, mineral composition and salt tolerance of tomato and wheat as affected by NaCl and P nutrition. Agrochimica 22, 140–149.
Cerda A, Bingham F T and Hoffmann G J 1977 Interactive effect of salinity and phosphorus on sesame. J. Soil Sci. Soc. Am. 41, 915–918.
Champagnol F 1979 Relationships between phosphate nutrition of plants and salt toxicity. Phosphorus in Agric. 76, 35–43.
Feigin A 1985 Fertilization management of crops irrigated with saline water. Plant and Soil 89, 285–299.
Foyer C and Spencer C 1986 The relationship between phosphate status and photosynthesis in leaves. Effects on intracellular orthophosphate distribution, photosynthesis and assimilate partitioning. Planta 167, 369–375.
Greenway H and Munns R 1980 Mechanisms of salt tolerance in nonhalophytes. Annu. Rev. Plant Physiol. 31, 149–190.
Heldt H W, Chon C J, Maronde D, Herold H, Stankovic Z S, Walker D A, Kraminer A, Kirk M R and Heber U 1977 Role of orthophosphate and other factors in the regulation of starch formation in leaves and isolated chloroplasts. Plant Physiol. 59, 1146–1155.
Herold A 1980 Regulation of photosynthesis by sink activity — the missing link. New Phytol. 86, 131–144.
Herold A, Lewis D H and Walker D A 1976 Sequestration of cytoplasmic orthophosphate by mannose and its differential effect on photosynthetic starch synthesis in C3 and C4 species. New Phytol. 76, 379–407.
Huber S C and Israel D W 1982 Biochemical basis for partitioning of photosynthetically fixed carbon between starch and sucrose in soybean (Glycine max Merr.) leaves. Plant Physiol. 69, 691–696.
Kingsbury R W, Epstein E and Pearcy R W 1984 Physiological responses to salinity in selected lines of wheat. Plant Physiol. 74, 417–423.
Leece D R and Short C C 1967 A routine procedure for the nutrient element analysis of peach leaves utilizing atomic absorption spectroscopy. NSW Dept Agric. Div. Sci. Services Bull. F78, 19 pp.
Munns R and Passioura J B 1984 Effect of prolonged exposure to NaCl on the osmotic pressure of leaf xylem sap from intact, transpiring barley leaves. Aust. J. Plant Physiol. 11, 479–507.
Muns R and Termaat A 1986 Whole-plant responses to salinity. Aust. J. Plant Physiol. 13, 143–160.
Nelson C J and Spollen W G 1987 Fructans. Physiol. Plant. 71, 512–516.
Nieman R H and Clark R A 1976 Interactive effects of salinity and phosphorus nutrition on the concentration of phosphate and phosphate esters in mature photosynthesizing corn leaves. Plant Physiol. 57, 157–161.
Priess J 1982 Regulation of the biosynthesis and degradation of starch. Annu. Rev. Plant Physiol. 33, 431–454.
Rathert G 1982 Influence of extreme K:Na ratios and high substrate salinity on plant metabolism of crops differing in salt tolerance. VII Relations between carbohydrates and degradative enzymes in salt tolerant and salt sensitive cotton genotypes during initial salinity stress. J. Plant Nutr. 5, 1401–1413.
Rathert G 1984 Sucrose and starch content of plant parts as a possible indicator for salt tolerance of crops. Aust. J. Plant Physiol. 11, 491–495.
Rathert G, Doering H-W and Witt J 1981 Influence of extreme K:Na ratios and high substrate salinity on plant metabolism of crops differing in salt tolerance. III K/Na effects on the carbohydrate pattern of bushbean and sugarbeet plants in response to the salt tolerance of the species. J. Plant Nutr. 4, 131–141.
Ravikovitch S and Porath A 1967 The effect of nutrients on the salt-tolerance of crops. Plant and Soil 26, 49–71.
Ravikovitch S and Yoles D 1971 The influence of phosphorus and nitrogen on millet and clover growing in soils affected by salinity. I Plant development. Plant and Soil 35, 555–567.
Rawson H M, Hindmarsh J H, Fischer R A and Stockman Y M 1983 Changes in leaf photosynthesis with plant ontogeny and relationships with yield per ear in wheat cultivars and 120 progeny. Aust. J. Plant Physiol. 10, 503–514.
Reuter D J 1986 Temperate and tropical crops.In Plant Analysis. An Interpretation Manual. Eds. D J Reuter and J B Robinson. pp 38–99. Inkata Press, Melbourne.
Seeman J R and Critchley C 1985 Effects of salt stress on the growth, ion content and stomatal behaviour and photosynthetic activity of a salt-sensitive species,Phaseolus vulgaris L. Planta 164, 151–162.
Sicher R C 1986 Sucrose biosynthesis in photosynthetic tissue: Rate controlling factors and metabolic pathway. Physiol. Plant. 67, 118–121.
Sivak M and Walker D A 1986 Photosynthesisin vivo can be limited by phosphate supply. New Phytol. 102, 499–512.
Stitt M, Gerhardt R, Wilke I and Heldt H W 1987 The contribution of fructose 2,6-bisphosphate to the regulation of sucrose synthesis during photosynthesis. Physiol. Plant. 69, 377–386.
Termaat A and Munns R 1986 Use of concentrated macronutrient solutions to separate osmotic from NaCl-specific effects on plant growth. Aust. J. Plant Physiol. 13, 509–522.
Yeo A R 1983 Salinity resistance: Physiologies and prices. Physiol. Plant. 58, 214–222.
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Gibson, T.S. Carbohydrate metabolism and phosphorus/salinity interactions in wheat (Triticum aestivum L.). Plant Soil 111, 25–35 (1988). https://doi.org/10.1007/BF02182033
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DOI: https://doi.org/10.1007/BF02182033