Effects of different environmental conditions on growth and absorption of inorganic components in halophyte Suaeda species
2016
Adachi, R. (Prefectural University of Kumamoto, Kumamoto (Japan). Graduate School of Environmental and Symbiotic Sciences) | Kajiwara, S. | Kondo, K. | Yokoyama, R. | An, P. | Matsuzoe, N.
Suaeda glauca and Suaeda salsa were grown under different NaCl concentrations (0, 150, 300, 450, and 600 mM) and temperatures (10, 20, and 30degC) to clarify the suitable growth conditions for these species. The dry weight of S. glauca tended to increase at NaCl concentrations of 150 mM and 300 mM compared to the control (0 mM). The dry weight increased significantly at 300 mM NaCl in S. salsa. The Na content increased as the NaCl concentration increased. The Cl content increased under all NaCl treatments other than the control. These results indicate that these plants absorb Na and Cl to enhance their osmotic adjustment. However, the K content decreased with increases in the NaCl concentration. The plant height and dry weight of these plants tended to increase with increases in temperature. However, the dry weights of plants grown at 20degC and 30degC were not significantly different. These results suggested that 20-30degC was a suitable temperature range for growing these plants. These result indicate that these two Suaeda species have different growth patterns compared with most higher plants under saline conditions, and that the cultivation of S. glauca and S. salsa can contribute to the effective utilization of saline soils.
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