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- KOREAN
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
Vol.28 No.1
Abstract
In the present study, we investigated the tolerance of Commelina communis to growth inCu-contaminated soil and water. We examined the germination rate, root and shoot growth of seedlings, fresh biomas in soil and water, and ability to eliminate Cu. We found that C. comunis containing 50 mg Cu/kg and removed over 50% of Cu from water containing 100 mg Cu/L Cu. In addition, the plants could accumulate 90 mg Cu/g when grown in soil containing 50 mg Cu/kg and 140 mg Cu/g when grown in soil containing 100 mg Cu/kg; thus higher levels of Cu removal were observed in soils containing higher Cu concentrations. In water, the maximal accumulation rate was 4.9 mg Cu/g root and 1.2 mg Cu/g shoot in water containing 20 mg Cu/L, and 7 days after exposure, Cu absorption saturated. Further, the growth rate of C. communis was not affected by up to 100 mg Cu/kg in the soil. Therefore, the phytotoxic effect of Cu on plants increased as the concentration of Cu was raised, although to diferent extents depending on whether the Cu was C. comunis was most effective at 100 mg Cu/kg in soil and 10 mg Cu/L in water. Finaly, we identified two peaks of Cu-binding ligands in C. communis. Which is a high molecular weight peak (HMWL) at 60 kDa (Fraction 17 to 25) and a Cu binding peptide peak at <1 kDa (Very low molecular weight ligand: VLMWL). Cu-binding peptide (Cu-BP) was observed to have an amino acid composition typical of phytochelations.
Abstract
The black locust (Robinia pseudoacacia L.) forests were studied by a phytosociological approach.Particular atention was given to characterize the vegetation classification, distribution pattern, and ecological flora of the syntaxa classified. A total of 38 releves were analyzed by using Corelation coeficient, UPGMA as character sets such as scrambler, annual and biennial plants, forest elements, and actual urbanization index. The analyzed data are based on site-releve matrix with relative net contribution degree (r-NCD) of species. A total of 77 families, 193 genera and 323 species of vascular plants are recorded. Camellino-Robinietum pseudoacaciae ass. nov. and Phragmites-Robinia pseudoacacia community were described. Main cluster and ordination could be separated: 1) urban type, 2) rural type, 3) riparian type, and 4) combined type. It is defined that the Robinietum is a representative unit on the black locust afforestation, Phragmites-Robinia community on lino-Robinietum ailanthetosum altissimae as an urban forest type. The Robinietum was considered as a perpetual community.
Abstract
This study was carried out to analyze the soil properties of Lepista nuda habitats to form a partof the studies on the characteristics of L. nuda. The soil samples colected from seven studied areas were investigated for soil properties such as soil moisture, soil pH, and the contents of organic and inorganic maters. The content of soil moisture was 29.7% and the content of organic mater was 32.1%. Total nitrogen was 0.74% and soil pH was 4.75, which was ranged from 3.6 to 5.20. In the content of inorganic mater, the content of Fe was highest as 1,024 ppm, K 183 ppm, Mn 21.9 ppm, Ca 2.02 ppm, Zn 1.46 ppm and Mg was lowest as 0.51 ppm.
Abstract
An important theme of this paper is to search for more genelalities of diversity and distributiones were analyzed by the Zurich-Montpellier Schol's method and generalized habitat characteristics by using Euclidean coefficient and PCoA (Principal Cordinates Analysis). Five plant comunities were classified and matched into largely two physiognomic types: grass-types such as Eragrostis ferruginea community, Eleusine indica community, Setaria viridis community, Digitaria ciliaris community, and forb-type of Plantago asiatica community only. These plant and moisture in microhabitat conditions: stable-moderate, unstable-moderate, stable-dry, and unstable-dry. Top-ten species showing the highest relative net contribution degree(r-NCD) were Digitaria ciliaris, Eleusine indica, Eragrostis feruginea, Plantago asiatica, Echinochloa crus-galli, Trifolium repens, Polygonum aviculare, Setaria viridis, Setaria glauca and Artemisia princeps. The front three species showing more than 50% in percent r-NCD possess florescence after monsoon season. It is critically pointed out that the regional ecological diferentiations i.e. the Daegu bioclimatic division, the C4-plant dominant season(post-monsoon) of Korean peninsula, and species composition diferent from Japan's Plantaginetalia asiaticae, are the basis for deriving characteristics of the roadbed trampled plant communities of Daegu.
Abstract
Fire, usualy a detrimental factor makes changes in comonly structure and functions when it ispracticed properly. In countries like Australia, South Africa, Japan and Texas in USA etc., fire is used as a tol to manage the natural ecosystems in productive condition on the basis of ecological approach. However, in developing countries like India there is efective measure to use and control fire in rangelands. This review provides knowledge on changes in sociological characters of plants, biomass profile, cycling of materials and Further, the informations furnished in this article will be more useful for the forest managers, planers of rangelands and administrators in countries like India and tropical countries with similar bioclimatic conditions to prepare appropriate management plans where the fire is an integral factor.