• Title/Summary/Keyword: vegetative

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Studies on Salinity and Growth of Rice at Seosan Reclaimed Land (서산 간척지의 염도와 벼의 생육에 관한 연구)

  • 이희선;김옥봉
    • The Korean Journal of Ecology
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    • v.20 no.5
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    • pp.367-373
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    • 1997
  • The effects of salinity on the growth and production of rice were studied at Seosan reclaimed land from July to October, 1995. The plant height, the number of living aleaves, dead leaves and total leaves, the number of the grains and the dry weight of the grains per individual, and the dry weight of above the ground in $25cm{\times}25cm$ quadrat were investigated on 5 plots whers were different salinity. The plant height, the number of living leaves and total leaves and the number of grains and the dry weight of grains per individual, and the dry weight of above the ground decreased as the salinity of water increase and the number of dead leaves of rice increased as the salinity of water decrease. The effect of salinity on the reproductive production is severer than the vegetative production. Because of the salinity, the growth and the production of the rice at Seosan reclaimed land are worse than the normal rice field.

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Ornamented Resting Spores of a Green Alga, Chlorella sp., Collected from the Stone Standing Buddha Statue at Jungwon Miruksazi in Korea

  • Klochkova, Tatyana A.;Kim, Gwang-Hoon
    • ALGAE
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    • v.20 no.4
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    • pp.295-298
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    • 2005
  • The growth of subaerial microalgae on historic buildings or various cultural properties causes discoloration and physico-chemical deterioration of the surfaces. We collected a subaerial chlorophyte, Chlorella sp., from the stone Standing Buddha statue at Jungwon Miruksazi, which is a national treasure of Korea, and found dormant, thickwalled spores with regular pentagonal ornamentation along with the vegetative Chlorella cells. The morphology of Chlorella resting spores was compared to that of the other green algal resting cells. The ornamented spores and smooth-walled vegetative cells revived in 2 weeks in a liquid freshwater medium and started reproduction by autospores. To our knowledge, the ability of Chlorella to form ornamented dormant spores in drought condition was not previously recorded. The ornamentation of spores would supplement taxonomic characteristics of this genus.

Comparison between Spatial Interpolation Methods of Temperature Data for Garlic Cultivation (마늘 재배적지분석을 위한 기온자료 공간보간기법 비교)

  • Kim, Yong-Wan;Hong, Suk-Young;Jang, Min-Won
    • Journal of The Korean Society of Agricultural Engineers
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    • v.53 no.5
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    • pp.1-7
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    • 2011
  • The objective of this study is to decide a spatial interpolation method on temperature data for the suitability analysis of garlic cultivation. In Korea, garlic is the second most cultivated condiment vegetable after red pepper. Nowadays warm-temperate garlic faces potential shift of its arable area according to warmer temperature in the Korean Peninsula, and the change can be drawn with the precise temperature map derived from interpolation on point-measured data. To find the preferable interpolation method in cases of germination and vegetative period of the garlic, different approaches were tested as follows: Inverse Distance Weighted (IDW), Spline, Ordinary Kriging (OK), and Universal Kriging (UK). As a result, IDW and UK show the lowest root mean square errors as for the germination and vegetative seasons, respectively. However, statistically significant difference was not revealed among the applied methods regarding the germinating period. Eventually this will contribute to mapping the suitable lands for the cultivation of warm-temperate garlic reasonably.

Effects of Temperature and Salinity on Germination and Vegeative Growth of Enteromorpha multiramosa Bliding(Chlorophyceae, Ulvales) (해산 녹조 털가지파래(Enteromorpha multiramosa Bliding)의 발아와 생장에 대한 온도와 염분도의 효과)

  • 김광용
    • Journal of Plant Biology
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    • v.33 no.2
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    • pp.141-146
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    • 1990
  • Germination and vegetative growth of Enteromorpha multiramosa Bliding from Pyoson, Cheju Island were investigated in laboratory under various combinations of temperature (5-$25^{\circ}C$) and salinity (8-48$^{\circ}C$). Percent level of germination was relatively high at all combinations of the two factors. The highest value among the combinations was revealed at 15$^{\circ}C$ and 32$\textperthousand$. Dry weight also was fairly high at all levels of combination with maximum value at 2$0^{\circ}C$ and 32$\textperthousand$. Analysis of variance for germination and growth was completed respectively and polynomial prediction models were constructed. F ratio revealed that all factors had a significant effect (p<0.001) on percentage of germination and dry weight, and their interactions also were significant (p<0.001), although the F ratio of interactions was far less than that for either the separate effect of temperature or salinity. Response surface of polynomial equation represented that temperature influenced less than salinity on germination, while it effected remarkably on vegetative growth, so the Enteromorpha multiramosa was kept to visible macrothalli from winter to spring in Cheju Island.

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A Gene of Neurospora crassa that Encodes a Protein Containing TPR Motifs

  • Lee Bheong-Uk
    • Proceedings of the Microbiological Society of Korea Conference
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    • 2003.05a
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    • pp.51-54
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    • 2003
  • Analysis of the Neurospora crassa genome data reveals at least 14 proteins that contain tetratricopeptide repeat (TPR) motifs. One of them shows over $60\%$ homology with SSN6 of Saccharomyces cerevisiae, a global repressor that mediates repression of genes involved in various cellular processes. Sequence analysis of its cDNA shows that it encodes a putative 102kDa protein. Mutant strains generated by RIP (repeat induced point mutation) process show four distinctive patterns of vegetative growth at various rates. They are male-fertile, yet all female-sterile and produced little or no perithecium. These results indicate that this gene is pleiotropic and involved in several cellular processes of vegetative growth, conidiation and sexual cycle. It is designated rcm-1(regulation of conidiation and morphology).

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Population Dynamics of Symplocarpus renifolius 1. Population Structure and Vegetative Growth (앉은부채 (Symplocarpus renifolius) 개체군의 동태 1.개체군의 구조와 영양생장)

  • Min, Byeong-Mee;Kang, Hyun-Jung
    • The Korean Journal of Ecology
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    • v.17 no.4
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    • pp.453-461
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    • 1994
  • Size class structure and vegetative growth of a perennial herb of the temperate deciduous forests, Symplocarpus renifolius Schott, were studied from 1991 to 1994 in Namhansansung, Kyonggi Province, Korea. The size class structures of leaf number and leaf area per individual followed bell-shape curve, i.e. frequency of middle class was relatively high. The leaf area increased from the late-March to mid-May. At the end of the growing season, leaf area(length X breadth) was proportional to biomass, especially aboveground biomass. The leaf number and leaf area per individual increased at the rate of 0.08 leaf/year and 9.7 $cm^2/year$, respectively. The size of the individuals in large-sized classes, in leaf number and leaf area, decreased in next year, while the size of the individuals in small-sized classes increased. Therefore, it was concluded that the size class structure of S. renifolius population was largely determined by the growth form.

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Enoylpyruvate Transferase Isozymes in Bacillus megaterium

  • Choi, Seung-Tae;Katsuji Tani;Ryoka Matsuno
    • Journal of Life Science
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    • v.2 no.4
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    • pp.232-239
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    • 1992
  • UDP_GlcNAc is metabolized to form vegetative cell wall, cortical peptidoglycans, and outermost layer consisting of galactosamine-6-phosphate ploysaccharide in life cycle of Bacillus megaterium. To obtain a better understanding of the UDP-GlcNAc regulation, we examined the activity of the common first enzyme for the synthesis of nucleotide precursors of peptidoglycans, enoylpyruvate transferase by newly developed method. Both the specific and the total activity decreased after the end of exponential growth followed by and increase from t5 but decreased again parallel to the appearance of the activity of UDP_GlcNAc-4-epimerase. Antibody specificity to anti-transferase IgG and the elution profile on DEAE-Sepharose revealed that B. megaterium has at least two enoylpyruvate transferase isozymes, and UDP_GlcNAc was metabolized to vegetative cell wall and cortical peptidoglycan by each isozme in exponential growth and in sporulation, respectively in life cycle.

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Vegetative Compatibility Group of Fusarium oxysporum f. sp. radicis-lycopersici in Korea

  • Kim, Sung-Ho;Kim, Jong-Tae;Jang, Chang-Soon;Yoo, Sung-Jun;Kim, Hong-Gi
    • The Plant Pathology Journal
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    • v.21 no.3
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    • pp.214-220
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    • 2005
  • Vegetative compatibility groups (VCGs) of Fusarium oxysporum f. sp. radicis-lycopersici isolates collected from tomatoes in Korea were analyzed to determine the genetic characteristics and compared to those of foreign isolates. In comparison of VCG specificity with foreign VCG subgroup testers, Korean isolates were revealed to be VCG 0094 and to be similar to those of Israel and Florida, USA having a 'Universal' property. Results of this study will contribute the effective control of disease through precise estimation of fungal damage, the prediction of new pathogenic isolates appearance, and the movement of foreign pathogens.

The effects of Fructure schizandra chinesis water on serum cholesterol metabolism in rats (오미자(五味子) 전탕액(煎湯液)의 투여(投與)가 흰쥐의 혈청(血淸) cholesterol 대사(代射)에 미치는 영향(影響))

  • Han, Sang-Hwan
    • The Journal of Internal Korean Medicine
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    • v.19 no.1
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    • pp.364-372
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    • 1998
  • It was investigated effect of Fructure schizandra chinesis Water extract on the white rat which was induced hypercholesterolemia by fatty diet. The results obtained were summarized as follows; Neutral lipid level in blood lipid was greatly decreased on the group being fed animal fat diet and Fructure schizandra chinesis Water extract, total cholesterol was decreased on the group being fed vegetative fat diet, HDL-cholesterol was shown that the group being fed vegetative fat diet and Fructure schizandra chinesis Water extract at a time more increased HDL-cholesterol in a little than the other group, and normal fat diet group show to highest figure,38.5mg/dl. Animal fat diet group is 20.75 mg/dl. but, the group being fed Fructure schizandra chinesis Water extract was increased to 31.00mg/dl. LDL-cholesterol had no difference between fat diet group and the group being fed Fructure schizandra chinesis Water extract.

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Ultrasonographic Diagnosis of Right Atrial Vegetative Endocarditis in a Cow (우의 우심방증식성심내막염의 초음파단층영상진단 1예)

  • Kweon Oh-Kyeong
    • Journal of the korean veterinary medical association
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    • v.24 no.1
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    • pp.19-24
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    • 1988
  • A lactating Holstein cow which did not have had responded to drug therapy during 2 months was clinically examined. Right atrial vegetative endocarditis was determined dy ultrasonographic diagnosis, and later it was confirmed at necropsy. An early systolic

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