The Effect of Seawater Salinity on Fatty Acid Composition and Mineral Nutrition Accumulation in the Korean Rapeseed Cultivars
2011
Lee, Y.H., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea | Lee, T.S., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea | Kim, K.S., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea | Jang, Y.S., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea | Cho, H.J., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea | Nam, S.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Suh, S.J., Rural Development Administration, Suwon, Republic of Korea | Park, K.G., Bioenergy Crop Research Center, NICS, RDA, Muan, Republic of Korea
Effects of different salinity levels (Ground water and EC 4, 8, 16 dS m-¹) on six Korean rapeseed cultivars and four lines were examined. Plant height, dry weight and seed yields decreased approximately linearly as salinity levels increased. Under various salinity levels, Tammiyuche, Tamlayuche, and Sunmang had the highest seed yields of all the cultivars or lines examined, whereas Naehanyuche and MokpoNo.114 had the lowest. In addition, proline content dramatically increased under seawater treatment of EC 8 and 16 dS m-¹, whereas the level of proline in EC 4 dS m-¹ was similar to the control indicating that the plant growth was significantly affected at EC 8 dS m-¹ and above. Furthermore, under the three different salinity levels, fatty acid compositions and mineral nutrition accumulation in the rapeseed were investigated. Oleic acid content increased slightly at EC 4 dS m-¹, when compared to control plants. The composition of other fatty acids was almost not changed. Absorption rates of mineral ions were determined for the six cultivars and four lines. Salinity significantly increased Na+ and Mg²+ in leaves, whereas it reduced K+. Overall plant response depends on the kinds of salts contributing to salinity.
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