Responses of Soybean and Cucumber Plants to Nacland CaCl2 Salinity in Nitrate and Enhanced Ammonium Nutrition

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概要

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• The effect of nitrate (4mM NO3[-]) and enhanced ammonium (3.5 mM NH4[+] + 0.5mM NO3[-]) nutrion on the growth soybean and cucumber plants grown hydroponically at 2 level (25 and 50Mm Cl[-]) of NaCl and CaCl2 salinity stress was investigated. The growth of both plants was better in nitrate nutrion than in enhanced ammonium nutrion. The pH values for enhanced ammonium solution decreased si,ilarly for both plants regardless of salinity stress In nitrate nutrion, lower sarinity did not affect soybean growth, whereas higher salinity clearly suppressed its growth. In the case of nitrate-fed cucumber plants, dry matter production was not decreased by the addition of CaCl2 but was by the addition of NaCl. In enhanced ammonium nutrion, the extent of growth suppression due to salinity was only small in soybean and cucumber plants. In both plants, trends in increases in the concentrations of Na, Ca and Cl in leaf parts caused by NaCl and CaCl2 salinity were similar in both nitrate nutrion and enhanced ammonium nutrion. Leaf Na concentrations did not increase in soybean plants but did in cucumber plants. Leaf N concentrationos that were higher in enhanced ammonium nutrion than in nitrate nutrion were not affected by salinity treatments. These results suggest that the acidity of the solution rather than the high levels of added salts affects plant growth in enhanced ammonium nutrion, and therefore, the effect of salinity on plant growth is less discentable in enhanced ammonium nutrion.

• 九州大学の論文
• 2004-10-00

著者

• Ikeda Motoki

  Laboratory Of Plant Nutrition Division Of Soil Science And Plant Production Department Of Plant Reso

• Ikeda Motoki

  Laboratory Of Plant Nutrition And Soil Fertility Faculty Of Agnculture Kyushu University

関連論文

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• Effects of Nitrogen Application on Growth and Yield of Nitrate-Tolerant Mutants of Soybean
• Comparative Studies on Chloroplast Development and Photosynthetic Activities in C3- and C4-plants. III. Studies on Activities of Some Enzymes Concerned with CO2 Fixation Following the Chloroplast Development in Barley and Maize Leaves
• Comparative Studies on Chloroplast Development and Photosynthetic Activities in C3 and C4-plants II. Studies on Carbon Dioxide Fixation in Barley and Maize Leaves
• Comparative Studies on Chloroplast Development and Photosynthetic Activities in C3- and C4-Plants 1. Studies on Ultrastructure of Developing Chloroplasts within Vascular Bundle Sheaths and Mesophyll Cells of Barley and Maize Leaves
• Methionine Sulfoximine Suppressed the Stimulation of Dark Carbon Fixation by Ammonium Nutrition in Wheat Roots
• Incorporation of Inorganic Nitrogen into Protein Fraction in Tomato Plants Grown with Ammonium and Nitrate as Nitrogen Sources
• Nitrogen Assimilating Enzyme Activity of Tomato Plant in Response to the Supply of Ammonium or Nitrate or Both
• Accumulation of Nitrogen Supplied as Ammonium in the Root Tips of Aluminum-Stressed Wheat Cultivars Differing in Aluminum Sensitivity
• Responses of Soybean and Cucumber Plants to Nacland CaCl2 Salinity in Nitrate and Enhanced Ammonium Nutrition

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