• The Korean Journal of Ecology
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• v.22 no.5
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• pp.265-270
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• 1999

A syntaxonomical study about the vegetation of ruined salt field in Chonnam province was carried out and its soil properties were also determined. This study was accomplished by the methods of Mueller-Dombois and Ellenberg. This study was designed to clarify the syntaxonomical and synecological characteristics of the vegetation of ruined salt field in Chonnam province. The annual herbaceous halophyte communities of ruined salt field in Chonnam province were consisted of 5 communities: Salicornia herbacea community, Sueada japonica community, Sueada maritima community, Atriplex gmelini community, Spergularia marina community. And the perennial herbaceous halophyte communities of ruined salt field in Chonnam province were consisted of 3 communities: Aster tripolium community, Carex scabrifolia community, Phragmites communis community. The subsidiary knowledges of this study will make it possible to accumulate information on the distribution pattern of coastal salt marsh vegetation, and also will provide practical information for conservation of coastal ecosystems.

• Korean Journal of Environmental Biology
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• v.35 no.3
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• pp.380-388
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• 2017

Factors affecting spatial distribution of halophytes were analyzed in June 2012 at the Goraebul coastal dunes. In the Goraebul sand dune, distribution of halophytes was divided into three groups. The first group belonging to Elymus mollis, Carex kobomugi, Calystegia soldanella, Ixeris repens and Glehnia littoralis was distributed in the ridge of primary sand dune and dune slack. The second group belonging to Lathyrus japonicus and Zoysia macrostachya was distributed in the dune slack. The third group belonging to Pinus thunbergii, Vitex rotundifolia and Linaria japonicus was distributed in the pine forest of the secondary sand dune. E. mollis, C. kobomugi, C. soldanella, I. repens and G. littoralis was distributed in relatively unstable habitat of sand dunes due to the large amount of sand movement. V. rotundifolia was distributed in a relatively stable habitat. Factors that have the greatest influence on distribution of halophytes in the Goraebul sand dunes are distance from the seashore, topography, and the pine forest. The Goraebul sand dune is a relatively well-preserved area with minimal human intervention. Therefore, different distribution of physico-chemical factors by natural processes is essential to spatial distribution of halophytes than other sand dunes in Korea. Significant natural processes in the Goraebul sand dunes were advance and retreat of coastlines from waves, erosion and sedimentation of sand due to wind and waves, and dispersal of seawater.

• Journal of Life Science
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• v.23 no.2
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• pp.182-189
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• 2013

Halophytes are unique land plants that are capable of thriving in a high-salt environment. They are attracting public attention due to their ability to synthesize bioactive substances such as UV protectants or antioxidizing agents. To achieve unaffected growth under high salinity, halophytes may take advantage of the activities of cell growth factors such as expansins. Expansins are well-known cell wall proteins that are responsible for cell enlargement. They loosen cell walls, thereby contributing to actual plant growth. This study aimed to identify positive roles of expansins in the growth of halophytes. Three expansin cDNA clones were isolated from seedlings of Suaeda japonica. Comparing the deduced amino acid sequences of the expansin genes of S. japonica with those of other plant species suggested that the cDNA clones isolated from S. japonica belong to the EXPA (${\alpha}$-expansin) gene family. A phylogenetic tree based on the deduced amino acid sequences revealed that the expansins of S. japonica share a close evolutionary relationship with those of strawberry (Fragaria ananassa) and jujube (Ziziphus jujuba), both of which are woody dicots. SjEXPAs did not show any remarkable change in the gene expression level in different NaCl concentrations, providing a clue to the unaffected seedling growth of S. japonica in a high-salt environment. In conclusion, the present study presents the first report of expansin genes from halophytes and suggests a putative role for these genes in plant growth under high salinity.

• Korean Journal of Plant Resources
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• v.20 no.4
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• pp.312-320
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• 2007

The resource plants at the reclaimed seaside in Songdo was listed 170 taxa: 39 families, 113 genera, 144 species, 23 varieties, 2 forms and 1 hybrid. In those, woody plants were 18 taxa (10.6%) and herbaceous plants were 152 taxa (89.4%). Among 170 taxa listed was confirmed 107 taxa of edible plants (62.9%), 99 taxa of medicinal plants (58.2%), 55 taxa of ornamental plants (32.4%) and 77 taxa of the others (45.3%). Salt plants (Including dune plants) consists of 12 taxa (Scirpus planiculmis, Sllaeda japonica, Artemisia scoparia, Scorzonera albicaulis, etc.). Specific plants by floral region were total 5 taxa; Vicia bungei in class IV, Koelreuteria paniculata in class III, Grewia biloba var. parviflora, Lysimachia fortunei, Rhapontica uniflora in class I. The naturalized plants in this site were 11 families, 27 genera, 37 species, 1 varieties, 38 taxa and naturalization rate was 22.4% of all 170 taxa resource plants.

• Korean Journal of Environment and Ecology
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• v.38 no.4
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• pp.354-366
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• 2024

Hibiscus hamabo, the northernmost semi-mangrove species in East Asia, presents an important case study for examining climate change's impact on temperate ecosystems and shifts in Korea's subtropical vegetation. This study investigates vegetation characteristics of H. hamabo and evaluates environmental factors influencing their distribution. H. hamabo communities are classified by regional and coastal types. Group I is found in depressed areas within deep bays, cohabiting with herbaceous halophytes. Group II develops along coasts with exposed bedrock or on gravelly coasts, cohabiting with tide tolerance vine shrubs. Group III in Japan encompasses a broader range of coastal environments compared to Korea. A monospecific population with over 100 individuals appeared in this group. this study reveals that precipitation of warmest quarter is the most important environmental factor affecting the distribution of H. hamabo communities. This research analyzes the influence of climatic variables in the distribution of semi-mangrove species, contributing to our understanding of ecological responses to climate change.