• Korean Journal of Plant Resources
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• v.1 no.1
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• pp.1-7
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• 1988

This experiment were carried out to study the heritability, genotypic, pheno-typic and environmental correlation in four edible oil crops. Heritabilities of flowering date, maturing date, plant height and weight of 1, 000 grains in rape were high. A highly significant positive correlation was found between flowering date and maturing date, plant hight and ear length, number of pods per ear and flowering date, maturing date and plant hight, The number of seed per pod showed also significant positive correlation with flowering or maturing date as well as with the relationship between weight of 1, 000 grains and plant height or ear length inrapeseed, respectively. Heritabilities of maturing date, length of stem with eapsule and number of seed per capsule were high, in sesame. Genotypic correlation between plant height and length of stem with capsule, length of stem with capsule and number of capsule per plant, number of capsule per plant and weight of 1, 000 grains, weight of 1, 000 grains and yield were highy positive in sesame. Heritabilities of flowering date, length of main stem, weight of 100 grains and number of shells per square meter in peanut were high, There was positive genotypic correlation between length of main stem and yield, number of shells per quare meter and matured seed ratio, number of shells per square meter and yield, 100 grains weight and yield. On the other hand, a significant negative correlation appeared between flowering date and yield. Heritabilities of days to flowering, stem length, stem diameter and weight of 1, 000 grains in perila were high. There was positive genotypic correlation between stem length and stem diameter, number of pods per plant, stem weight etc, between number of internodes and number of pods per plant, stem weight, number of valid branches and number of pods plant as well, respectively. While, a significant negative correlation was observed between number of valid branches and weight of 1, 000 grains, between number of pods per plant and weight of 1, 000 grains.

• Korean Journal of Agricultural Science
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• v.24 no.1
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• pp.6-10
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• 1997

Ninety-four collections of domestic ginger were evaluated for plant hight, leaf number, stem number, leaf length and width, rhizome yield per plant revealed good variability in stem number and rhizome yield per plant. Moderate variation was observed in plant hight, leaf number, leaf length, leaf width and stem diameter. Rhizome yield per plant was positively correlated with six characters, and leaf number, plant height and stem diameter were positive significant correlation with rhizome yield per plant. Path coefficient analysis indicated that stem number, followed by leaf number, stem diameter, had maximum direct effects on rhizome yield per plant. Maximum indirect effect was observed in case of plant height through leaf number. The indirect effects of leaf length and leaf width through leaf number, and plant height, leaf length and leaf width through stem diameter were also observed. From the selection point of view, the characters like plant height, stem number and leaf number per clump may be considered suitable in choosing a good genotype.

• Korean Journal of Plant Resources
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• v.2 no.2
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• pp.252-258
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• 1989

This study was investigated to find out the optimum planting densities of Aptum graveolns L. about growth characters, yield components and yi-eld at 9 planting densities by transplanting cultureThe results obtained are summarized as follows ;1 . Studying the correlationship, the highly negative significances we-re found between planting densities and petiole weight , planting d-ensities and plant weight , respectively .2. Plant hight was longest in spacious planting, and was short in dense3 . Petiole yield was thinkest in planting densities(50$\times$35n), and wasthin in planting densities(40$\times$25n) .4. Yield of Petiole was increased in PLanting densities(50$\times$25cn) ,quality and yield of petiole were highest by optimum plantting densi-ties (50$\times$35cn ) .

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.4
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• pp.355-360
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• 1992

The experiment was carried out to study the influence of planting densities and fertilizer application levels on some agronomic characters and yield of flower-head in Zingiber mioga ROSC. The results obtained are summarized as follows ; Plant hight was long in dense planting, and short in spacious planting. Stem diameter was thick in spacious planting, and was thin in dense planting. Flower-head weight per plant was decreased in dense planting and was increased in spacious planting. Yield was higher in dense planting densities (10$\times$20 : 50plants /m$^2$, 20$\times$20 : 25plant /m$^2$). Fertilizing (N : P$_2$O$_{5}$ : $K_2$O=15 : 15 : 15kg /10a) was increased than without fertilizing because plant height and number of stem was good.d.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.1
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• pp.101-106
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• 1985

A series of experiments were carried out to know the effect of growth retardants on the growth of rice seedlings and ethylene evolution from the rice seedlings. The results suggested that the reduction rate in order of plant height was S-327 > BAS-106 > NTN-821 > PP-333 > CGR-811. The heigher concentration levels of growth retardants applied. the more effective reductions of plant height were found. Ethylene evolution from the rice seedlings was significantly negative correlated with plant hight of of seedlings in all treatments.

• Journal of Plant Biotechnology
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• v.32 no.1
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• pp.45-50
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• 2005

Virus-free stocks was produced by the combination of the heat treatment of virus infected plant and shoot-tip grafting (STS). To produce virus-free stocks, the plants infected with citrus viruses were used for virus-free stock production using the modified method of STG in thermotherapy at $40^{\circ}C$ for 16 hours in the light, and at $30^{\circ}C$ for 8 hours of darkness for 4 weeks. Trifoliate orange (P. trifoliata) were used as rootstock seedling for STG. Percentages of virus-free stocks against citrus tristeza virus (CTV), satsuma dwarf virus (SDV) and citrus tatter leaf virus (CTLV) were $75.7\%,\;100.0,\%\;82.6\%$ respectively. Shoot tip size for successful STG were as small as possible. Less than $0.3\;\cal{mm}$ of shoot tips gave the hight efficiency of virus free plants but survival rates were low. And, survival rate after shoot-tip culture was analyzed and the rates were dependant on the cultivars; Yuzu cultivar showed the hight survival rate ($74.6\%$) and early satsuma mandarin (Iwasagi) was $13.3\%$ as the lowest cultivar. But citrus trees were not succeed to grown, turned brown, and died.

• Korean Journal of Plant Tissue Culture
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• v.28 no.6
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• pp.341-346
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• 2001

To investigate the effects of MS medium strength and nitrogen concentration on bulblet formation from bulblet scale segment culture and bulblet growth from bulblet of Lilium oriental hybrid 'Casa Blanca', asiatic hybrid 'Mona', and longiflorum hybrid 'Hinomoto', 0.5∼2.0 strength of MS salts and 30∼120 mM nitrogen concentrations of MS medium were examined in vitro. The number of bulblets from bulb scale segment was favored in the strength of 0.5∼1.0 strength of MS salts or 30 mM total nitrogen concentration of MS medium in three cultivars. But the growth of bulblets formed in vitro was promoted in the 2 strength of MS medium or hight concentration of total nitrogen of MS medium up to 120 mM in three experimented cultivars.

• Archives of Pharmacal Research
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• v.14 no.2
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• pp.99-102
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• 1991

A hight performance liquid chromatographic methods was developed for the seperation and determination of seven alkaloids in "sanjoin" (the seeds of Zizyphus jujuba Rhamnaceae), a plant with potent sedative activity. A reverse phase system of Lichrosorb RP-Select B column and 0.05 M potassium phosphate buffer (pH = 3.5)-acetonitrile with gradient elution was employed. Two known alkaloids, juzirine and lysicamine, were newly isolated fom "sanjoin"."sanjoin".oin&".ot;.

• Journal of Life Science
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• v.11 no.6
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• pp.612-617
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• 2001

Seedlings of red pepper (Capsicum annum L.) were exposed to various doses of ${\gamma}$-radiation )($^{60}$ Co)and cultivated in the 1/2,000 a pot. Plant hight the number of leaves, flowers and fruits, chlorophyll contents, plant dry weight, ac- tivites of antiozidant enzymes such as superoxide dismutase(SOD) adn peroxidase(POD), were determined. Plant height of seedling treated with 1 Gy of ${\gamma}$-radiation was increased up to 16.6% as compared to untreated control at 80 days after treatment, while those treated with 20 Gy or 50 Gy was decreased 22.0% or 75.0% respectively. The plants treated with 1 Gy or 5 Gy were increased the number of leaves up to 41.2% and 24.9% as well as dry weight of fruit up to 58.4% and 49.4% respectively. However treatment of radiation higher than 20 Gy significantly inhibited the growth, chlorophyll content and yield of pepper fruit. Activities of antioxidant enzymes, SOD and POD were tem-porary increased within one or five days after treatment depending on the doses of treatment , and the activities were gradually decreased to control level of lower thereafter. The SOD and POD activities in the leaves of pepper plant treated with 50 Gy were 5.5 and 6.0folds higher than that of control at five days after treatment, respectively.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.27 no.3
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• pp.206-217
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• 1982

This experiment was conducted to study about nutrient absorption of flag leaf and chaff of rice plant different transplanting date with elevations. Heading stage was delayed by destructive cold temperature or late transplanting. Plant analyses revealed that above poor plants also had higher total nitrogen content, but ower silicate in the flag leaf and sterile chaff. Total nitrogen and silica contents to accumulated in flag leaf between yield was significant high correlation. The chaff of late transplanting and sterility was high total nitrogen. Relationship between silicate absorption and total nitrogen of chaff was significant high correlation. Ripening temperature after heading stage was influenced total nitrogen of chaff. Phosphate, potassium, calssium and silicate contents of chaff increased hight ripening temperature but total nitrogen decreased. Therefore, inorganic element contents of chaff was closely connected with grain sterility.