한국 해안식물의 무기이온 및 유기용질 양상
Inorganic and organic solute pattern of costal plants in Korea
해안식물 무기이온 유기용질;
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13 costal plants collected from different habitats have been investigated to elucidate their ecophysiological characteristics. Inorganic ions (Ca^(2+), Na^(+), K^(+), Mg^(2+), Cl^(-)) and organic solutes (carbohydrates, glycine betaine) were measured quantitatively. Chenopodiacous plant species (Atriplex gmelini, Salicornia europaea, Suaeda japoneca.) showed tendency accumulating of inorganic ions such as Na^(+) and Cl^(-) instead of K^(+). Most Cheonopodiacous plants had a little water-soluble Ca, so maintained high K/Ca ratio in leaves. Chenopodium serotinum which lives in ruderal habitat contained higher K^(+) and lower Na^(+) than other of Chenopodiaceae. Most Chenopdiacous plants investigated showed relatively low concentration of carbohydrates and high content of glycine betaine which found in high abundance in the tissues of a number of halophytic higher plants. On the other hand, Plant species belong to Gramimeae (esp. Phragmites communis) and Cyperaceae absorbed selectively K^(+) ion and excluded Na^(+) and Cl^(-) effectively, and they accumulated more carbohydrates as an osmoticum than Chenopodeaceae. In conclusion, it is regarded that physiological characteristics such as the accumulation of inorganic and glycine betaine in Chenopodiaceous plants and the efficient regulation of ion K ion and uptake and accumulation of soluble carbohydrate in monocotyledonous plant species enable them to live in dry and saline habitats.