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셀레늄 처리가 4가지 채소종자 발아와 싹의 생장 및 셀레늄 흡수 특성에 미치는 영향
정용화 ( Yong Hwa Cheong ),한명자 ( Myung Ja Han ),성선진 ( Sun Jin Sung ),서동철 ( Dong Cheol Seo ),강종구 ( Jong Gu Kang ),손보균 ( Bo Kyoon Sohn ),허종수 ( Jong Soo Heo ),조주식 ( Ju Sik Cho ) 한국환경농학회 2009 한국환경농학회지 Vol.28 No.2
This study was carried out to investigate the effect of selenium treatment on the growth of vegetables sprout. Four vegetables, such as cabbage, lettuce, pak-choi and leaf mustard were examined under various selenium treatments (0, 1, 5, 10, 25, 50, 100 mg L-1). Seed germinations in cabbage, pak-choi and leaf mustard were significantly inhibited at high concentration of selenium treatment. However, seed germination in lettuce was not much inhibited. Growth characteristics, such as soot length, root length, fresh weight and chlorophyll contents, were not much decreased at 1 mg L-1 of selenium and then significantly inhibited with the increase of selenium concentration at above 5 mg L-1 in all four vegetables. The selenium content increased linearly with the increase of selenium concentration. At the range of 1 to 25 mg L-1 of selenium treatment, selenium contents in vegetables were 0.11 to 1.15 of cabbage, 0.16 to 0.61 of lettuce, 0.13 to 1.31 of pak-choi and 0.14 to 1.13 mg g-1dw of leaf mustard, respectively. These results showed that treatment of selenium with the range of 1 to 5 mg L-1 could be used to produce the selenium enriched vegetable sprouts.
식물 생장 촉진 활성을 가진 인산분해 미생물 Pantoea 종의 분리 및 특성 규명
윤창연(Chang Yeon Yun),정용화(Yong Hwa Cheong) 한국생명과학회 2016 생명과학회지 Vol.26 No.10
식물생장촉진미생물(PGPR)은 농업생산성에 전세계적으로 매우 중요한 기작과 기능을 하는 것으로 알려져 있다. 이들 미생물들은 식물생장조절, 생물비료, 식물의 병 저항 및 방제 등 다양한 기작으로 식물생장을 촉진하면서 유용하게 이용되고 있다, 본 논문에서는 토양으로부터 네 종류의 서로 다른 Pantoea 종을 분리하여 식물생장 특성을 규명하고자 하였다. 16S rDNA 유전자의 분석에 의하면, 이들은 각각 Pantoea ananatis, Pantoea citrea, Pantoea dispersa, Pantoea vagans으로 확인되었고 각각 Pa1, Pc1, Pd1, Pv1으로 명명하였다. 분리된 모든 종들은 pH 5정도의 수치를 보이는 접종 1일차에 매우 높은 인산 분해 활성을 보였으며 배지의 pH 감소와 높은 상관성을 보였다. 또한 네 종류의 모든 Pa1, Pc1, Pd1, Pv1종은 각각 85.3±16.3 ㎍/ml, 183.9±16.8 ㎍/ml, 28.8±17.3 ㎍/ml, 114.1±16.5 ㎍/ml 농도의 매우 높은 인돌 아세트산 생성활성을 보였다. 지베렐린 생성의 경우 Pa1, Pc1와 Pd1는 각각 331.1±19.2 ㎍/ml, 288.5±16.8 ㎍/ml, 309.2±18.2 ㎍/ml 농도로 높은 활성을 보였지만, Pv1는 10.2±11.5 ㎍/ml 농도의 비교적 낮은 생성활성을 보였다. 또한 모든 분리 종들은 어린 상추식물의 경우 생체량의 32~37%, 상층부 길이의 10~15% 생장을 촉진하는 활성을 보이므로 이들 분리된 미생물을 잠재적으로 식물생장촉진을 위한 미생물비료제재로 사용할 수 있다고 생각된다. Plant growth-promoting rhizobacteria (PGPR) have gained worldwide importance and acceptance due to their agricultural benefits. These microorganisms are potential tools for sustainable agriculture, with effects on plant growth, biofertilization, induced systemic resistance, and biocontrol of plant pathogens. In this study, four different Pantoea species were isolated from field soil, and their plant growth-promoting characteristics were studied. Based on 16S rDNA gene sequencing analyses, the se were grouped into Pantoea ananatis, Pantoea citrea, Pantoea dispersa, Pantoea vagans and named as Pa1, Pc1, Pd1, Pv1, respectively. All of these strains have their ability for solubilization of insoluble phosphate depending on pH decrease at the range around pH 5 at 1days after inoculation and production of plant hormone indole acetic acid (IAA) with 85.3±16.3 ㎍/ml of Pa1, 183.9±16.8 ㎍/ml of Pc1, 28.8±17.3 ㎍/ml of Pd1 and 114.1±16.5 ㎍/ml of Pv1, respectively. Pa1, Pc1 and Pd1 also have high activity for production of gibberellin (GA3) hormone with 331.1±19.2 ㎍/ml of Pa1, 288.5±16.8 ㎍/ml of Pc1, 309.2±18.2 ㎍/ml of Pd1, but Pv1 does not. Furthermore, all these species have significantly promoted the growth of the lettuce seedling plants at the range around 32~37% for fresh weight and 10~15% for shoot length enhancement, so that these microbe could be used as a potential bio-fertilizer agents.
채소종자 발아와 유묘생장에 미치는 유기 또는 무기게르마늄의 효과 및 흡수특성
한명자 ( Myung Ja Han ),김성은 ( Sung Un Kim ),서동철 ( Dong Cheol Seo ),정용화 ( Yong Hwa Cheong ),이도진 ( Do Jin Lee ),박문수 ( Moon Su Park ),임요섭 ( Yo Sup Rim ),손보균 ( Bo Kyoon Sohn ),허종수 ( Jong Soo Heo ),조주식 ( Ju S 한국환경농학회 2007 한국환경농학회지 Vol.26 No.3
To investigate effects of inorganic (GeO2) and organic (Ge-132) germanium (Ge) on seed germination and on early stage growth of plants and the uptake characteristics, various concentrations (0, 10, 25, 50, 100 mg L-1) of Ge to popular vegetables such as leaf mustard, chinese cabbage and pak-choi, respectively, were treated. On seed germination, no significant effect was observed in both inorganic and organic Ge treatments except 100 mg L-1 treatment of inorganic Ge. Exogenous inorganic Ge (10∼100 mg L-1) treatments significantly inhibited the early root elongation growth of all plants. However, slight enhancement of early shoot elongation was detected in low concentrations (10 and 25 mg L-1) of Ge in the leaf mustard and chinese cabbage plants. Organic Ge treatments significantly stimulated the root and shoot growth at the 10, 25 and 50 mg L-1 treatments. Ge was accumulated linearly in the vegetables as both inorganic and organic Ge concentrations were increased. Interestingly, total contents of Ge in plants with Ge-132 treatments were 2∼4.5 times more than those with inorganic Ge treatments in all concentrations. At 25 mg L-1 treatment of Ge, contents of Ge in vegetables are following: in leaf mustard, inorganic Ge: 0.37 mg g-1dw and organic Ge: 1.47 mg g-1dw; in the chinese cabbage, inorganic Ge: 0.4 mg g-1dw and organic Ge: 0.86 mg g-1dw; in the pak-choi, inorganic Ge: 0.33 mg g-1dw and organic Ge: 0.70 mg g-1dw, respectively. These results showed organic Ge is much better on early stage seedling growth and on germanium accumulation of vegetables than inorganic Ge.
김홍기 ( Hong Gi Kim ),서동철 ( Dong Cheol Seo ),정용화 ( Yong Hwa Cheong ),강창순 ( Chang Sun Kang ),손보균 ( Bo Kyoon Sohn ),이도진 ( Do Jin Lee ),강종구 ( Jong Gu Kang ),박문수 ( Moon Su Park ),허종수 ( Jong Soo Heo ),김봉수 ( 한국환경농학회 2007 한국환경농학회지 Vol.26 No.4
In greenhouse farming, a variety of humic acids have been applied to improve soil conditions and plant growth. However, it is still unclear that how humic acids combined with chemical fertilizers affect growth and quality of fruit vegetable crops. This study was conducted to determine the combination effect of humic acids and chemical fertilizers on the growth and fruit quality of tomato (Lycopersicon esculentum MILL.) grown under greenhouse conditions. Three different formulation types of humic acid were used: liquid type A, liquid type B and solid type C. The tomato plants were grown in three treatment combination plots and in conventional fertilizer (CF) plot with recommended levels of nitrogen, phosphorus and potassium: HA combined with CF (HA+CF), HB combined with CF (HB+CF) and HC combined with CF (HC+CF). For most of growth characteristics (i.e. leaf number, internode length, maximum leaf length, leaf width and chlorophyll contents) determined in this experiment, no significant differences were observed between all combination treatments and CF. However, integrated fruit qualities (i.e. averaged weight, sugar contents and acidity) were slightly improved in the humic acid combined with CF treatments when compared with CF alone treatment. No phytotoxicity was observed with humic acid treatments. However, further studies will probably be needed to use widely and safely these humic acids, in order to ensure a maximizing growth, fruit yield and quality of tomato.