• 농업과학연구
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• 제38권4호
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• pp.631-639
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• 2011

This research was conducted to investigate potential use of New Zealand spinach (Tetragonia tetragonoides) as a new vegetable crop which will be cultivating in salt-affected soils including reclaimed land. Traditionally New Zealand spinach has been studied to explore functional compound or salt removing potential. To cultivate the crop species in the salt-affected soil widely, it is essential to obtain salt and soil texture responses under the controlled environment. Fifty nine New Zealand spinach ecotypes native to Korean peninsula first collected over seashore areas, and primitive habitat soil environment was evaluated by analyzing soil chemical properties from 32 locations. Different textures of sandy, silt loam, and sandy loam soils were prepared from nearby sources of sea shore, upland and paddy soils, respectively. Target salinity levels of 16.0 dS/m, 27.5 dS/m, 39.9 dS/m, and 52.4 dS/m in electrical conductivity (ECw) were achieved by diluting of 25, 50, 75, 100% (v/v) sea water to tap water (control, 0.6 dS/m), respectively. Various measurements responding to soil texture and irrigation salinity included plant height, root length, fresh weight (FW), dry weight (DW), leaf parameters (leaf number, leaf length, leaf width), lateral branching, and inorganic ion content. was found to adapt to diverse habitats ranging various soil chemical properties including soil pH, organic matter, exchangeable bases, EC, and cation exchange capacity (CEC) in Korea. Responding to soil texture, New Zealand spinach grew better in silt loam and sandy loam soil than in sandy soil. Higher yield (FW and DW) seemed to be associated with branch number (r=0.99 and 0.99, respectively), followed by plant height (r=0.94 and 0.97, respectively) and leaf number (r=0.89 and 0.84, respectively). Plant height, FW, and DW of the New Zealand spinach accessions were decreased with increasing irrigation salinity, while root length was not significantly different compared to control. Based on previous report, more narrow spectrum of salinity range (up to 16 dS/m) needs to be further studied in order to obtain more accurate salinity responses of the plant. As expected, leaf Na content was increased significantly with increasing salinity, while K and Ca contents decreased. Growth responses to soil texture and irrigation salinity implied the potential use of New Zealand spinach as a leafy vegetable in salt-affected soil constructed with silt loam or sandy loam soils.

• Asian-Australasian Journal of Animal Sciences
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• 제21권8호
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• pp.1171-1177
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• 2008

The performance of growing rabbits fed Ruzi grass (Brachiaria ruziziensis), head lettuce (Lactuca sativa) residue, Mimosa pigra and water spinach (Ipomoea aquatica) was studied in an experiment using 64 rabbits (4 males and 4 females per treatment) of 2 breeds, New Zealand White and a crossbred between New Zealand White and native breed. The rabbits had an average initial weight of 668 g, were about 6 weeks old and were housed in individual pens. The foliages were fed ad libitum and a commercial concentrate was fed at a restricted level of 2% of body weight on a dry matter (DM) basis. In the digestibility experiment, the rabbits, 4 per foliage and males only, were fed the same foliages as in the growth experiment but without concentrate. Daily weight gain was lower in the group fed Ruzi grass, 14.8 g/d (p<0.001) compared to 17.6, 18.5 and 18.4 g/d for head lettuce, Mimosa pigra and water spinach, respectively. Feed intake and feed conversion ratio were lowest for the rabbits fed water spinach, 66 g DM/d and 3.6 kg DM/kg live weight, respectively. The New Zealand White breed had a higher daily gain than the crossbred rabbits (p<0.05), 18.0 and 16.7 g/d, respectively. There were no significant differences in feed intake, growth or feed conversion ratio due to sex. The digestibility coefficients of DM, organic matter, crude protein, crude fiber, neutral detergent fiber and acid detergent fiber were significantly lower (p<0.001) in the rabbits fed Ruzi grass. Breed and sex had no effect on digestibility. In conclusion, feeding head lettuce residue, Mimosa pigra and water spinach resulted in higher growth rate and digestibility than feeding Ruzi grass and can be recommended as alternative feeds.

• Journal of Plant Biotechnology
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• 제43권2호
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• pp.157-163
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• 2016

본 연구는 국내 동, 서 및 남해안 바닷가 근처 사구지역에서 자생하는 번행초 55개체를 수집하여 AFLP 마커시스템을 적용하고 이들 유전자원들간의 유전다양성 차이를 알아보기 위하여 실시하였다. 우선 전체 게놈의 특이적 부위를 절단하기 위하여 제한효소로 EcoRI과 MseI 12개 조합을 활용하였고, 그 결과 총 1,279 절편을 확보할 수 있었다. 이 결과는 제한효소 조합당 평균 107개의 절편이 생산된 것으로 이 중 평균 62개(약 58%)가 유전자원간에 다형성을 나타냈다. 이와 같이 유전자원간에 다형성을 보인 게놈 절편을 대상으로 유전다양성을 분석한 결과 조사된 55개체 번행초 유전자원 집단은 29%의 유전적 차이를 보이는 것을 알 수 있었다. 또한 군집분석을 통해 유전적 차이를 보이는 그룹을 분류한 결과 국내 자생 번행초 유전자원은 총 7개의 집단으로 나누어짐을 알 수 있었다. 본 연구에서 국내외 최초의 번행초 유전 다양성 평가 정보는 향 후 품종 육성을 위한 교배친의 선발에 적용하여 다양한 유전적 차이를 보이는 분리집단을 확보하는 데 활용이 가능할 것으로 생각된다.

• 농업과학연구
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• 제39권4호
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• pp.515-523
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• 2012

Recent development and enlargement of reclaimed lands along the sea shores required to explore alternatives to existing crops, which are suitable to grow well and to declare higher profits. The objectives of this study were to investigate yield-related parameters for development of new leafy vegetables, and to screen some candidates among New Zealand spinach genotypes which were collected in Korea. Initially all the collected genotypes were grown for 7 weeks in a greenhouse of the experiment field in Chungnam National University, and then transplanted into the field to measure morphological or physiological parameters (plant height, branch number, stem diameter, chlorophyll content, and maximum canopy diameter), and yield-related parameters (leaf number, leaf length, leaf width, fresh weight and dry weight). Those parameters were quantitatively measured at 1, 5 or 9 weeks after transplanting (WAT). Parameters exhibiting statistically significant difference among the accessions were plant height, branch number, maximum canopy diameter, chlorophyll content, and leaf length. In contrast to highly correlated parameters with fresh and dry weight obtained in salt-affected soil in the earlier report, fresh weight was correlated significantly with leaf length (r=0.72), leaf width (r=0.64), and canopy diameter(r=0.66), while dry weight was correlated significantly with plant height (r=0.46), leaf length (r=0.72), leaf width (r=0.73), fresh weight (r=0.79), chlorophyll content (r=0.47), and canopy diameter (r=0.87). Based on the significantly correlated with yield parameters, the candidate accessions which were ranked in top statistical groups include CNU06A01, CNU06A13, CNU06A26, CNU06A35, CNU06A38, and CNU06A55. In order to be cultivated in reclaimed lands, it is necessary to screen out salt tolerant accessions among the above high-yielding genotypes.

• Applied Biological Chemistry
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• 제9권
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• pp.1-7
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• 1968

뉴우질랜드 시금치(Tetragonia expansa)잎의 절편(切片)을 $2.0{\times}10^{15}$ quanta $cm^{-2}$ $sec.^{-1}$의 일정 레벌의 에너지를 가지는 각파장(各波長)의 광선(光線)을 쪼였을때 일어나는 violaxanthin의 de-epoxidation과 zeaxanthin의 epoxidationq 반응(反應)의 action spectrum을 측정(測定)하였다. De-epoxidation의 action spectrum에서는 480nm와 648nm에 두 개의 주 피이크를 나타내었고 청색광선(靑色光線)은 적색광선(赤色光線)보다 더 유효(有效)하였으며, 700nm 이상의 파장(波長)에서는 효과(?果)가 없었다. 한편 expoxidation의 spectrum은 440과 670nm 근처(近處)에 피이크를 나타내었고 이것 또한 청색광(靑色光)이 적색광(赤色光)보다 유효(有效)하였으나 700nm 이상의 파장(波長)에 있어서 확실(確實)히 효과(?果)를 나타내었다. Epoxidation과 de-epoxidation의 상반(相反)되는 두 반응(反應)의 정(正)의 결과(結果)는 하나의 cycle scheme 즉 산소(酸素)와 광반응생성물(光反應生性物)을 소비(消費)하는 "violaxanthin cycle"로 보아진다. Action spectra가 지시하는바와 같이 청색광(靑色光)이 적색광(赤色光)보다 더 유효(有效)하다는 것은 청색광(靑色光)에 의한 자극(刺戟)으로 진행(進行)되는 $O_2-uptake$로 간주(看做)된다. 두 action spectrum간(間)의 차이점(差異點)들은 다분히 두 개의 광합성기구(光合成機構)가 동시(同時)에 관련(關聯)되고 있다는 것을 시사한다. 그러므로 violaxanthin cycle은 청색광(靑色光)에 위해서 발생(發生)하는 과잉(過剩)한 광합성생성물(光合成生性物)의 소비경로(消費經路)로서, 또는 그들 생성물(生性物)을 어떤 다른 형태(形態)의 에너지로 전환(轉換)하는 역할(役割)을 하는것이라 보아진다.