• Journal of Plant Biotechnology
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• 제35권2호
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• pp.163-167
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• 2008

Adventitious buds appeared within 2 weeks on the base of the petiole explants and increased for two months. A maximum of regeneration (15.6%) was obtained on the medium containing $1.5\;{\mu}M$ TDZ in combination with $1\;{\mu}M$ IBA. To know which explants are the best for the induction of regeneration, three explants such as leaf, petiole and leaf-petiole were used. Among the explant types, the leaf-petiole explant was significantly more effective than leaf and petiole for promoting adventitious shoots, with leaf-petiole inducing at the highest regeneration frequency (33.7%). The regeneration frequency of adventitious shoots in the leaf-petiole explants was significantly affected by leaf size and the position of explants. The leaf-petiole smaller than 5 mm leaf in width was induced at the highest regeneration frequency (68.9%). The smaller leaf sizes, the greater regeneration frequency. Also when the leaves are nearer to the shoot tip, the regeneration frequency is higher. When the rooted micro-shoots were transferred to the soil after growing for 6 weeks in the media, the survival rate was 90%.

• 생물환경조절학회지
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• 제13권2호
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• pp.96-101
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• 2004

This study was conducted to determine the daily application rate and amount of N and K with fertigation during different growth stages in semi-forcing culture of cucumber plants (Cucumis sativus L. cv. Eunseongbaekdadagi). The diagnostic criteria for N and K also investigated based on petiole sap analysis. The dry weight increased slowly until 30 days after transplanting. The highest dry weights were observed at 60 days after planting, then it decreased. As the plant grew, the contents of N and K in the petiole sap and fruit of cucumber decreased. The daily uptake of N and K were highly correlated with the growing days. The $NO_3$ concentrations in petiole sap were in the range from 3,500 to 4,500 mgㆍ$L^{-1}$ in the early growth stage, but those were in the range from 2,000 to 3,000 mgㆍ$L^{-1}$ after then. However, K concentration in petiole sap were in the rang from 5,000 to 7,000 mgㆍ$L^{-1}$ The fluctuation in petiole sap concentration of K was severe in the monthly fertigation and moderate in the daily fertigation. The fertigation by petiole sap diagnosis forced EC of soil to be low and yield to increase compared to the control.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.358-358
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• 2017

The plant type is generally one of the most important factor for crop production and be influenced by nitrogen absorption. Soybean plants have nodules in their roots, supplying nitrogen at the vegetative and reproductive stages. Root nodules seem to effect plant type of soybean plants, but there are few reports on the relation nodules and plant type. We tried to clarify the effects of root nodules on the plant type, especially internode length and petiole length, comparing non-nodule soybean with normal soybean. The pot experiment and field experiment were carried out at Mie University and Utsunomiya University in 2015 and 2016. Enrei, a popular cultivar in central Japan, and En1282, non-nodulating isogenic line of Enrei, were used. The petiole length on main stem was measured after defoliation and internode length and yield components were measured after harvest. In the field experiment, the patterns of the final length in internode and petiole on main stem were consistent in both cultivars, and a positive correlation was found between the Nth petiole length and the N-1th internode length, belong to the same phytomere. Therefore, the petiole and internode on the main stem make similar response for environmental factors. In pot experiment, Enrei grew with the same pattern as field experiments, but in En1282, the elongation of petiole and internode in the upper part was suppressed, especially the petiole was suppressed greatly. The main stem becomes the basis of the plant type. These results were considered that the nitrogen is distributed preferentially to the internode than the petiole. It seems that the pot cultivation restricted the rhizosphere and caused nitrogen deficiency in En1282. These results suggested that the slight nitrogen deficiency provided from the root nodules was compensated by the increase of the amount of inorganic nitrogen absorption due to the expansion of the rhizosphere, and the severe nitrogen deficiency suppressed elongation of petiole and internode. It is clear that root nodules effect the plant type by supplying nitrogen to internodes and petioles.

• Journal of Plant Biology
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• 제10권1_2호
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• pp.3-20
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• 1967

1. Comparative studies, the number, form and pattern of ramification, on the petiole stele types of 3 orders, 11 families, 41 genera and 104 species of ferns found in Korea were carried out. 2. The number, form and pattern of the ramified steles were found to be different according to the taxa studied. 3. The stele types of petiole may be classified as unibranch, bibranch, tribranch, and polybranch. The species belonging to each stele type were found to have similar embyrological characteristics among them. Therefore, it might be reasonable to assume that the stele type can be used as a basis for classifing family lines. 4. The number of ramified steles in the petiole were found to be in general agreement with that of the leaf traces, though a few exceptional cases were found. 5. It is well known that there is a large degree of disgreement among the taxanomists on the classification of ferns. The classification of ferns by means of petiole stele types may ease this difficulty in certain extent.

• 식물분류학회지
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• 제40권1호
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• pp.16-26
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• 2010

한국산 조팝나무속(Spiraea L.)에 속하는 3절 18분류군(sectts. Calospira: 복산방화서절 - 7분류군, Chamaedryon: 산방화서절 또는 산형화서절 - 10분류군, Spiraria: 원추화서절 - 1분류군)에 대해 엽병의 횡단면을 단부, 중앙부, 기부로 나누어서 비교하고 기재하였다. 엽병의 횡단면은 아원형, 렌즈형이거나 반달형이고, 두 개의 분리된 날개를 갖는 분류군과 날개를 갖지 않는 분류군으로 세 부위(단부, 중앙부, 기부)에서 차이를 보였다. 엽병의 해부학적 형질로는 횡단면의 모양 및 크기, 유관속의 모양 및 크기, 그리고 모용 및 결정체의 모양과 존재 여부들이 분류군 간에 비교 되었다. 본 연구 결과에서는 엽병의 해부학적 형질들이 한국산 조팝나무속내 분류체계에 적용시키기에는 미약하였지만, 종간 진단형질로는 유용함이 확인되었다. 엽병형질들을 바탕으로 한국산 조팝나무속 분류군에 대한 검색표를 제시하였다.

• 한국육종학회지
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• 제40권2호
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• pp.143-152
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• 2008

1913년부터 2000년까지 국내에서 육성된 70품종에 대한 초형형질에 관련된 주경, 분지 및 엽형질의 특성을 파악하여 다수성 콩 품종개발의 기초자료로 이용코자 하였다. 1. 초형형질의 변이는 주경과 분지관련형질의 12개 형질 중에서 초형폭, 분지장 및 초형폭/장 비율이 컸으며, 엽관련 8개형질 중에서는 엽병각, 엽장폭비 및 엽건물중이 컸다. 2. 용도별로 초형폭/장 비율은 밥밑콩이 장류 및 두부용콩과 나물콩에 비하여 높았고 장류 및 두부용콩과 나물콩은 큰 차이가 없었다.총분지장/주경장 비율은 나물콩과 밥밑콩이 높았고 장류 및 두부용콩이 낮았다. 3. 주경과 분지형질은 초형폭/장 비율과 총분지장/ 주경장 비율에 의하여 각각 그룹으로 분류되어졌고, 협초폭형이며 주경의존형은 단원콩, 금강콩, 셀비 및 신팔달콩이었고, 협초폭형이며 분지의존형은 소명콩이었다. 광초폭형이면서 주경의존형은 강림, 금강대립 및 진율콩이었으며, 광초폭형이면서 분지의존형은 검정콩 2호이었다. 4. 용도별로 소엽장/폭 비율은 밥밑콩이 작았고 장류 및 두부용콩과 나물콩과는 큰차이가 없었으며, 복엽의 엽면적은 밥밑콩이 가장 컸고 나물콩이 가장 작았다. 엽병장은 나물콩이 작았으며 장류 및 두부용콩과 밥밑콩은 큰 차이가 없었고, 엽병각은 밥밑콩이 가장 컸고 나물콩이 가장 작았다. 5. 엽형태는 엽장폭비와 엽면적에 의하여 각각 4그룹으로 분류 되어졌고, 소엽장폭비가 큰 원엽이면서 엽면적이 큰 대형엽은 부석과 대황콩이었고, 엽장폭비가 극세엽이면서 엽면적이 작은 소형엽은 은하콩과 소호콩이었다. 6. 엽병의 특성은 엽병장과 엽병각에 의하여 각각 3그룹과 4그룹으로 분류 되어졌고, 엽병장이 짧고 엽병각이 작은 품종은 은하콩이었고, 엽병장이 짧고 엽병각이 큰 품종은 알찬콩, 무한콩 및 푸른콩이었으며, 엽병장이 길고 엽병각이 작은 품종은 신팔달콩 2호이었다. 7. 은하콩은 전 시험품종 중에서 엽장폭비가 가장 큰 극세엽이면서 엽면적이 가장 작은 소형엽이었고, 엽병장이 가장 짧으며 엽병각이 가장 작은 품종이었다.

• Journal of Plant Biology
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• 제28권1호
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• pp.21-28
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• 1985

The bipinnate-compound leaf of Parkia clappertoniana has prominent, long petiole with a pulvinal base. The pulvinus has wood, periderm, lenticels and extensive cortical layer. Its vascular bundles are elongated with alternating rays. The vascular bundles of the petiole, rachis and veins are oval, with conspicuous bundle caps. Stomatal complex is predominantly paracytic with occasional occurrence of anomocytic stomata near the midrib. The oval stomata have conspicuous stomatal ledges. Trichomes are unicellular, acicular and restricted to the rachis, petiole and pinnule mid-ribs and margin. Ecological and taxonomic significance of features is discussed.

• 한국자원식물학회지
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• 제2권2호
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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 ) .

• Journal of Plant Biotechnology
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• 제4권1호
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• pp.17-21
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• 2002

To establish an the mass production system of grape anthocyanin pigments through callus and cell suspension culture, the effects of various combinations of auxins and cytokinins on friable callus production were studied. for friable callus production, 2,4-D was superior to other regulators. IAA at 2 mg/L induced callus from stem and petiole while NAA resulted in rooting. Callus induction rate increased with the 2,4-D level, and stem segments were superior to leaf blade or petiole, showing nearly 100% with 1 and 2 mg/L 2,4-D from petiole and stem. Combined treatments of 2,4-D + kinetin and NAA + BA also yielded friable callus from stem segments. In treatments with 1 mg/L 2,4-D + 1 mg/L kinetin and 1 mg/L NAA + 1 mg/L BA, callus induction rate was nearly 100%. The combination effect of 2,4-D and BA on anthocyanin production was not significant.

• Plant Resources
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• 제8권3호
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• pp.286-292
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• 2005

Shoot induction system was developed in the recalcitrant plant species, Brassica rapa ssp. rapifera by using optimum selection of profit organ, phytohormone combination, seedling age and kind of culture container. Out of in vitro cultured leaf segment, petiole, hypocotyl, and cotyledon with petiole, only cotyledon with petiole derived from 4 day-old seedlings induced multiple shoot. The optimum combination of auxin and cytokinin for the multiple shoot induction was MS medium containing 5mg/L BA and 0.5mg/L NAA. The major factors for multiple shoot propagation were part of plant organ, age of seedling, and ratio of auxin and cytokinin. In addition, shoot regeneration was promoted in the 100ml Erlenmeyer flask compared with the $90mm{\times}20mm$ Petri-dish. The induced shoots formed roots easy on MS medium containing 0.1mg/L IBA and the whole plants were successfully cultivated in soil.