• 한국작물학회지
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• 제47권6호
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• pp.486-491
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• 2002

일반계인 추청벼, 화성벼와 통일계인 남풍벼를 공시하여 질소(5수준), 분시방법(2수준) 및 유수형성기 차광처리(3수준)에 따른 영화수, 지경 분화수, 퇴화수 등 영화수 구성요소, 질소함량, 건물중, 비구조탄수화물 등을 조사하여 경엽의 질소보유량 및 건물중과 영화수 구성요소와의 관계, 그리고 영화형성 효율의 품종간 차이를 검토하였으며 그 결과를 요약하면 다음과 같다. 1. 단위면적당 1차지경수는 유수분화기와 그 후 15일 및 출수기, 3차지경수는 유수분화 후 15일 출수기의 경엽중의 질소보유량과 유의한 정의 상관을 나타내었다. 단위면적당 1차지 경수는 유수분화기의 경엽중, 2차지경수는 유수분화 후 15일의 경엽중과 유의한 정의 상관이 있었다. 2. 단위면적당 2차지경 퇴화수와 영화의 퇴화수는 유수분화 이후 15일간의 경중 증가량, 경중의 비구조탄수화물 증가량, 그리고 이때의 비구조탄수화물 함량과 유의한 부의 상관을 나타내었다. 3. 단위면적당 영화수는 출수기의 경엽중 질소보유량, 경업의 건물중과 유의한 정의 상관관계가 있었다. 4. 출수기 경엽중의 질소보유량당 영화수로 표현한 영화형성호율은 통일계인 남풍벼가 일반계인 화성벼와 추청벼보다 높았으며, 영화형성효율은 건물중이 증가함에 따라 감소하였다. 이 기간중 엽의 건물중과는 상관관계가 없었으나 경의 건물 중 증가에 따라서는 모든 품종에서 유의하게 감소하였다. 생식생장기간 동안의 건물 중 증가에 따른 영화형성효율은 구조 탄수화물의 증가에 따라서 감소되었으며, 출수기 경중의 저장 탄수화물 함량이 높은 경우 영화형성효율이 높아지는 경향이었다.

• ALGAE
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• 제19권1호
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• pp.49-57
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• 2004

This study was performed to obtain basic information on the ecology of Zostcra marina and to promote efficient conservation of this species which has been decline in Gamak Bay, Yeosu, Korea. Whater column characteristics and eelgrass morphology at Anpori, Jangsuri and Wonpori were investigated every month from December 1999 to November 2000. The water temperature, salinity and pH at the three sites were 10.0-27.0${\circ}C$,29.4-34.7% and 8.1-8.5, respectively. The water temperature at Anpori tended to be slightly lower than that at the other locations; the salinity at Wonpori from July to November was a little lower than that of the other locations. The concentrations of $NO_2$-N, $NO_3$_N, $NH_4$-N, $PO_4$-P and $Si(OH)_4$-Si at the three sites were 0.9-1.3, 2.0-6.2, 7.8-9.0, 3.0-3.6 and 22.2-30.2 uM, respectively. The concentration of $NO_3$-N at Wonpori from June to November was somewhat lower than that at the other locations; that of NH4-N at Jansuri was somewhat lower than the others. The mean shoot height and leaf width of the Anpori, Jangsuri and Wonpori populations were 80.6 cm and 0.9 mm, 90.0 cm and 1.0 mm, and 95.3 cm and 1.0 mm, respectively. The mean total shoot weight of the Anpori, Jangsuri and Wonpori ones was 24.5,31.0 and 29.7 & respectively. The mean leaf and branch numbers of the Anpori, Jangsuri and Wonpori populations were 16.5 and 2.6, 16.1 and 2.4 and 15.4 and 2.6 individuals, respectively. The correlation coefficients between shoot height and water temperature, leaf width and total shoot weight, leaf number and branch number, and $Si(OH)_4$-Si and $NO_3$-N were 0.726, 0.692, 0.862, and 0.693, respectively. The coefficients between shoot height and $NO_3$-N, total shoot weight and NO_3$-N, water temperature and $Si(OH)_4$-Si, water temperature and salinity, and water temperature and $NO_3$-N were -0.716, -0.536, -0.775, -0.685 and -0.685, respectively. The first four principal components explain 71.1% of the total sample variance. For axis 1, shoot height and water temperature tended to correlate with the population of Jansuri, followed by the Wonpori population, and $Si(OH)_4$-Si and $NO_3$-N tended to correlated strongly with the Anpori population. For axis 2, total weight, leaf width, leaf number and branch number showed a tendency to correlate with the Anpori and Jangsuri populations. For axis 3, the Anpori population tended to be influenced by $NO_2$-N and $PO_4$-P. For axis 4, the Wonpori and Jangsuri populations tended to be affected by salinity. The tendency, however, differed according to season.

• 한국산림과학회지
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• 제46권1호
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• pp.21-28
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• 1980

채종원(採種園)에서 18년생(年生) 접목묘(接木苗)인 슬래쉬 소나무를 대상(對象)으로 하여, 구과형성(毬果形成)과 가지의 형태학적(形態學的)인 상관관계(相關關係)를 조사했다. 춘기(春期)에 조사한 지당(枝當) 자화수(雌花數)와 상관관계가 가장 큰 것은 전년도(前年度) 신초지(新梢枝)의 지당(枝當) 엽중량(葉重量)이었다. ($R^2=+0.41$). 웅화수(雄花數)는 신초지(新梢枝)의 엽중량(葉重量)과 부(負)의 상관(相關)을 보여주었다. ($R^2=-0.21$). 웅화(雄花)에서 자화(雌花)로의 성전환(性轉換)은 그 가지의 생장력(生長力)(vigor)이 증가함에 따라서 촉진(促進)되었다. 자화(雌花)가 거의 착화(着花)되지 않는 개체목(個体木)의 토부수관(土部樹冠)에서 채취(採取)한 정아(頂芽)와, 자화(雌花)나 웅화(雄花)가 대량(大量)으로 착화(着花)한 개체(個体)의 정아(頂芽)로, 유관속 조직의 생장(生長)을 비교(比較)한 결과, 전자(前者)가 후자(後者)보다 훨씬 빨랐으며, 이는 자화(雌花)를 생산(生産)하지 않는 정아(頂芽)는 강(强)한 영양생장(營養生長)의 경향(傾向)을 나타냄을 뒷받침하는 것이다.

• 한국작물학회지
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• 제49권4호
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• pp.284-288
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• 2004

The response of dissolved oxygen (DO) concentrations caused significant change in root number, root length, coleoptile length, shoot length and leaf age of seedlings. The genotypic difference in the effect of DO also highly significant (P<0.01) for all of the seedling traits. The number and length of root were extremely inhibited at the condition of $0.39\pm0.09$ DO concentration. While the coleoptile elongated markedly in the lowest DO concentrations, the shoot did not develop. The root growth was improved slightly at the $1.39\pm0.27mg L^{-1}$, however, there were no difference among genotypes at these two low DO concentrations. As the DO concentration become higher, the growth of root and shoot was improved remarkably. Root number, root length and shoot length was significantly different between $20\;and\;30^{\circ}C$ in DO rich and normal conditions, the development of those traits were apparently accelerated in high water temperature, however those traits of seedlings in DO deficiency were not different between the two temperatures except for shoot length. On the other hand the coleoptile length was not affected by the stagnant water temperature; it was stimulated by the low DO concentration. The competition of DO was greater as the seedling density was increased in the stagnant water, therefore the seedlings grown under high density have long and white coleoptiles, and the growth of roots and shoots was retarded severely.

• 식물조직배양학회지
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• 제21권4호
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• pp.239-246
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• 1994

배수성이 상이한 수박(Citrullus lanatus Thunb.) 2배체, 3배체 및 4배체의 유묘 정단을 배양해 본 결과 배수성 차이가 기관 형성에 큰 영향을 미치지 않았으나 시토키닌의 종류와 농도에 따라 기관 형성에는 차이가 심했다. BA 처리시에는 0.3 mg/L의 저농도에서, 2iP 나 kinetin 처리시에서 5∼10.0 mg/L 첨가 배지에서 신초형성이 양호하였으나 생장은 심히 억제되었다. 재생된 신초의 정단을 배양해 본 결과 kinetin은 신초 형성에 거의 효과가 없었고 BA 0.3∼0.5mg/L 첨가구에서 신초증식이 양호하였으며 IAA 0.3 mg/L와 혼합처리는 신초의 증식과 생장 및 마디수 증가에 효과적이었다. 기내에서 형성되는 신초는 부정아 및 액아 유래였으나 대부분은 액아가 발달하여 신초로 생장하였다. 광도와 아가 농도를 달리하여 배양해 본 결과 4배체는 광도와 아가 농도에 관계 없이 신초형성수가 거의 비슷하였으나 생장은 억제되었으며, 3배체는 광도와 아가의 농도가 증가할수록 신초형성수 및 생장이 감소하였다. 또한 광도가 높아질수록 측지의 발생이 양호하였으나 잎의 노화현상을 나타냈다. 생장억제제의 처리는 신초형성수 및 생장을 현저하게 감소시켜 계대배양 기간을 연장할 수 있었다. Ancymidol ; TIBA ; CCC ; PP333은 처리농도간 신초형성수에 차이를 나타내지 않았으며 억제제 중 ABA 처리구가 신초형성과 생장에 가장 억제적으로 작용하였다. 모든 억제제 처리구에서 잎의 전개와 발달이 불량하였다.

• Journal of Plant Biotechnology
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• 제3권2호
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• pp.95-100
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• 2001

To select the section with shoot formation ability, the calli and shoot formation from three sections (first leaf including cotyledonary node, hypocotyl and cotyledon explants) of 5-days-seedlings of soybean were induced on MS medium supplemented with 1.0 mg/L BAP, 3% sucrose, and 0.3% gelrite for one month. The first leaf section exhibited the highest shoot formation rate (51%), followed the hypocotyl section (10%) and the cotyledon section (0%). The shoot formation rates and shoot number of the four excised sections (whole first leaf, a half of the first leaf, a third of the first leaf and only node) of the first leaf were also investigated on the same medium. A half of the first leaf explant and the third of the first leaf explant had higher shoot formation rates (76-80%) and numbers (3-4 / explants) than those in other two explants. Effects of six cytokinins (kinetin, zeatin, BAP, 2iP, PBA, and TDZ) on shoot formation were determined, using the half of the first leaf explants. Zeatin (1.0 mg/L) exhibited the highest in shoot formation rate (94%) and numbers (8 / explant). In addition, the combined effects of three cytokinins (zeatin, BAP, and TDZ; 0.5, 1.0, 2.0 mg/L, respectively) and an auxin (IAA; 0.0, 0.5, 1.0, 2.0 mg/L) were determined. The combination (1:1, v/v) of zeatin (1.0 mg/L) and IAA (1.0 mg/L) exhibited the highest in shoot formation rate (96%) and numbers (16 / explant), twice more than zeatin (1.0 mg/L) alone. The shoot cuttings were transferred and cultivated on the rooting media supplemented with only auxin, IBA at various concentrations. The highest root formation (8 / shoot) was achieved on the medium supplemented with 1.5 mg/L. After 4 weeks of cultivation, the plantlets with an extensive root system were transplanted in pots with a soil mixture of vermiculite and fine sand. Transferred to field, about 75% of the plantlets survived.

• 한국약용작물학회지
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• 제7권4호
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• pp.296-302
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• 1999

인삼 조직배양에 있어 multi-shoot 대량번식을 통한 이차대사산물의 이용가능성을 조사코자 강제통기방식에 의해 $CO_2$를 기내에 공급하여 배배양하였던 바 multi-shoot 분화특성 및 사포닌 함량에 미치는 $CO_2$의 효과는 다음과 같다. 부정아 수와 부정아 유래의 신초수는 무처리와 $CO_2$ 2처리구간에 차이가 적었고 분화율은 50%내외이었고 부정아에서 분화한 신초는 경엽의 전개가 빠르고 생장량이 높은것이 특징이었다. 한 개의 자엽에서 분화되는 shoot primordium의 수는 대체로 15.4개-23.9개로 $CO_2$ 2, 500ppm처리구가 가장 양호하였고 $CO_2$ 10, 000ppm의 고농도는 오히려 shoot primordium수 뿐만 아니라 신초 분화율도 저하시켰다. 무처리의 건물율은 7,50%이었던데 반하여 $CO_2$ 2, 500ppm처리구는 건물율이 8.59%로 여타 $CO_2$ 처리구에 비하여 가장 높았다. 기내개화율은 무처리가 7.6%이었으나 $CO_2$, 2, 500-5, 000ppm처리구는 16.3-15.7%로 무처리에 비하여 2배 가량 높았다. 그러나 1개의 치상 배에서 얻어지는 개화수는 1.2-1.3개로 $CO_2$ 처리농도에 따른 차이가 없었다. 조사포닌 함량은 $CO_2$ 2, 500ppm처리구의 경우, 캘러스와 신초가 혼재되어 있는 소식물체는 5.80%이었던데 비하여 multi-shoot가 8.32%로 높았고 ginsenoside함량은 multi-shoot의 경우, ginsenosid Rd, Re 그리고$Rg_1$이 특히 많았다.

• The Korean Journal of Ecology
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• 제17권2호
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• pp.105-112
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• 1994

Structure of grassland communities was investigated, and performance of populations of Themeda triandra var. japonica and Miscanthus sinensis were compared on limestone and granite soils. Forty three and forty taxa occurred on the limestone and granite grasslands, respectively, but their similarity was very low. Shoot height and number of hills per patch, as a measure of performance, of Themeda on the limestone grassland were higherthan those on the granite grassland. In contrast, shoot height and number on hills per patch of Miscanthus were higher on limestone than granite grassland. Evidence shows that poor growth of Micanthus population on the limestone soil was associated with higher content of insoluble divalent cations than soluble ones in shoot tissue.

• 한국연초학회지
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• 제19권1호
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• pp.18-23
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• 1997

The study was carried out to clarify reasonable production of healthy seedling, optimal Pot depth, and appropriate transplanting time, which can be deduced from understanding of seedling quality. Seedling quality results from growth of root and shoot, morphology and distribution of root system under influence of Pot depth during seedling growing period. Stem height, shoot dry weight, leaf area and leaf number were increased in proportion to depth of pots. Growth of shoot and root during seedling growing period showed the most dramatic development between 20th and 25th day after temporary planting. Root number increased as pot depth decrease and total root length and dry weight increased as pot depth increase. In 5cm pot, relative multiplication rate was higher and mean extension rate was lower than other depth of Pot. The limitation of pot volume in which rhizosphere was located enhance the development of roots of second and third order. At 20th days after temporary Planting root distribution was relatively uniform in length and development of adventitious root on stem base was poor as Pot depth decreased.

• 한국자원식물학회지
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• 제11권3호
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• pp.353-357
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• 1998

This study was conducted to determine the effect of growth regulators, genotype, and cutting position on the rooting and root growth from cutting of Chrysanthemum zawadskii H.. Rooting rate of Keungugeolcho in the treatement of IBA 500 and 1000 ppm was the better than those of other treatments of IAA, NAA and Rooton. Rooting rate differed depending on the genotype. Hangryobonggugeolcho was better than Keungucheolcho in rooting rate. The treatment of rooton remarkably induced many roots from the cuttings of eight accessions of Chrysanthemum zawadskii H.. Also, rooting rate and number of root differed depending on cutting position. When cuttings including shoot tip were cultured on tray containing bed soil, rooting rate and number of root induced from cuttings with shoot tip was higher than when cuttings without shoot tip and with lateral axillary bud were cultured.