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- W2000286838 abstract "Abstract The effect of a high Na content in plant on rice (Oryza sativa L. cv. Yamabiko) and tomato (Lycopersicon esculentum Mill cv. Saturn) growth was investigated. The high Na content was achieved by the supply of NaCI (rice: R1: 40, R2: 60, R3: 80, R4: 100, R5: 120; tomato: R1′: 10, R2′: 20, R3′: 40, R4′: 60, R5′: 80 mmol( + ) kg-1) to the nutrient solution or spray of NaCl (rice: L1: 40, L2: 60, L3: 80, L4: 100, L5: 120; tomato: L1′: 10, L2′: 20, L3′: 40, L4′: 60, L5′: 80 mmol( +) kg-1) on the leaves. The high Na content in the tops suppressed the transport of K to the tops in rice and the uptake of K by the roots in tomato under N a spray conditions. The L5′ tomato leaves could not tolerate the high Na content (or lower osmotic potential (OP)) and exhibited necrosis. The N a spray resulted in a larger N a accumulation in the tops of rice and tomato than the Na supply at 2 d. This trend persisted until 8 d in tomato, but the N a supply resulted in a larger accumulation of N a in the rice tops. In the Na supply treatments, the T/R ratio of DC (uptake concentration accompanied with transpiration) of Na was considerably higher than that in the control (CO) for rice, while approximately the same values as those of CO were obtained in tomato. These results indicate a difference in the response of the protection and maintenance of the structure and function of the roots of the species to a high Na concentration. A close negative relationship was observed between the DC of Na and K for both species in the Na supply treatments, and a larger slope was obtained in tomato. Water absorption was related to osmotic absorption for rice, and to transpiration for tomato. In tomato, the increasing cation content led to the increase in the difference of OP between tops and roots, and contributed to the increase of water absorption. The water deficit (WD) in rice tops increased with the increase of Na supply concentrations, unlike in tomato tops. The Na spray led to negative WD values in tomato tops and decreased them with the increase of Na concentrations. In both species, the lower the WD, the larger was the dry weight (DW) under a certain Na content in the tops. These results suggest that an adequate water status may improve plant growth and may enable to overcome the detrimental effect of Na." @default.
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- W2000286838 date "1998-06-01" @default.
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- W2000286838 title "Importance of Na content and water status for growth in Na-salinized rice and tomato plants" @default.
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- W2000286838 doi "https://doi.org/10.1080/00380768.1998.10414440" @default.
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