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http://dx.doi.org/10.5141/JEFB.2002.25.2.101

Adaptations and Physiological Characteristics of Three Chenopodiaceae Species under Saline Environments  

송승달 (경북대학교 자연과학대학 생물학과)
김진아 (경북대학교 자연과학대학 생물학과)
추연식 (경북대학교 자연과학대학 생물학과)
배정진 (경북대학교 자연과학대학 생물학과)
김인숙 (경북대학교 자연과학대학 생물학과)
추보혜 (경북대학교 자연과학대학 생물학과)
이인중 (경북대학교 농업생명과학대학 농학과)
Publication Information
The Korean Journal of Ecology / v.25, no.2, 2002 , pp. 101-107 More about this Journal
Abstract
Three species of Chenopodiaceae, i.e. Suaeda japonica, Salicomia herbacea, Beta vulgaris var. cicla, were investigated to compare the physiological characteristics through inoic balances and osmoregulations under different environmental salt gradients. Plats were harvested in two weeks from treatments with salt gradients (0, 50, 100, 200 and 400 mM NaCl) and mineral nutrition gradients(1/1, 1/5, 1/10 dilutions of Hoagland solution). Plants were analyzed for growth responses, ionic balances, osmolalities, conductivities, glycinebetaine and proline contents quantitatively. Three plants of Chenopodiaceae accumulated slats into tissues unlike some salt sensitive species, and showed unique adaptation patterns to overcome saline environments, i.e. strong growth stimulation for Salicomia herbacea, growth negative tolerance for Suaeda japonica, and growth positive tolerance for Beta vulgaris var. cicla. The absorption of inorganic Ca/sup 2+/ ions was inhibited remarkably due to the excess uptake of Na+ with increasing salinity. The K+ content in plants was significantly reduced with increasing salinity. Total nitrogen content was reduced as mineral nutritions and salinity increased. Conductivity and osmolality increased with increasing salinity regardless of mineral nutritions. The ranges of glycinebetaine and proline contents were 0.2∼2.5 μM/g plant water and 0.1∼0.6μM/g plant water, respectively.
Keywords
Beta vulgaris var. cicla; Glycinebetaine; lonic patterns; Proline; Salicomia herbacea; Salinity; Suaeda japonica;
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