PARENT SESSION
Poster Session 12: Physiology
Tuesday, August 9, 5:00 PM - 6:30 PM, Exhibit Hall 220 A-E, Level 2, Palais des congrès de Montréal
Ecophysiological characteristics of coastal plants in Korea.
Choi, Sung chul*,1, Bae, Jeong jin1, Choo, Yeon sik1, Park, Yong mok*,2, 1 Kyungpook National University, Daegu, Rep, Korea2 Cheongju University, Cheongju, Rep, Korea
ABSTRACT- In order to elucidate the ecophysiolohycal characteristics of coastal plants, we collected them on salt marsh and sand dune, and analyzed inorganic (Na+,K+,Mg2+,Ca2+,Cl-)and organic solutes (soluble carbohydrate, glycine betaine) quantitatively. Chenopodiaceous plant species (Saliconia europaea, suaeda glauca, Suaeda japonica) and Aster tripolium showed a tendecy to accumulate inorganic ions such as Na+ and Cl- in stead of K+ relatively low concentration of carbohydrates and showed high concentration of glycine betaine which is one of the most effective compatiale solutes in the leaves of plants under drough and saline conditions.On the other hand, plant species which belong to Gramineae (Elymus mollis, Ishaemum anthephoroides, Phragmites communis), Cyperaceae (Carex kobomugi, Carex pumila), Vitex rotundifolia and Messerschmidia sibirica absorbed K+ selectively and excluded Na+ and Cl- effectively inspite of habitat conditions, and they accumulated more soluble carbohydrate as an osmoticum than Chenopodiaceous plants. These results suggested thatphysiological characteristics such as high storage capacity for inorganic ions (especially alkali cation, chloride) and the accumulation of glycine betaine in chenopodiaceous plants , and K+-preponderance, an efficient regulation of ionic uptake (exclusion of Na+ and Cl-) and the accumulation of soluble carbohydrate in monocotyledonous plants and other plant species on sand dune enable them to grow dry and saline habitats.
Key words: coastal plant, glycine betaine, inorganic ions, carbohydrate