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황선구,Sang Cheol Lee,Junkyung Lee,Jae Woo Lee,Jin‑Hyuk Kim,Seung Young Choi,Jin‑Baek Kim,Hong‑Il Choi,Cheol Seong Jang 한국식물학회 2020 Journal of Plant Biology Vol.63 No.6
A total of 2561 gamma ray-induced mutants (M7) were evaluated in six abiotic stress treatments, and then principal component analysis was performed to score their phenotypes. Resequencing was performed on 123 selected rice mutants and wild-type rice to assess the structural changes in the genomes of these mutants, such as single nucleotide polymorphisms (SNPs) and insertion/deletion (InDels). A total of 5160 (avg. 87.3 per plant) SNPs and 7195 (avg. 121.9) InDels were observed in the 200-Gy lines, whereas 5650 (avg. 88.3) SNPs and 7676 (avg. 119.9) InDels were found in the 300-Gy lines. We found that one candidate gene (Os02g0528900, which is similar to the gene for pleiotropic drug resistance (PDR)-like ATP-binding cassette (ABC) transporter) contained two SNPs that were included in principal component 4 via a genome-wide association study. The 300-42 line had the lowest phenotype score against heat, possibly suggesting the existence of a relationship between these SNPs and heat stress. Co-expression analysis of the candidate gene involved in responses to toxic substances and the chemical stimulation of significant biological processes. Therefore, the studied targeting induced local lesions in genome (TILLING) population could be a useful source of mutations in the breeding of new genetic resources for forward and reverse genetics.
Protopectinase를 이용한 식물조직의 단세포화
이승철(Seung-Cheol Lee),고보성(Bo-Sung Ko),이대희(Dae-Hee Lee),황용일(Yong-Il Hwang) 한국식품영양과학회 1997 한국식품영양과학회지 Vol.26 No.3
Protopectinase는 식물조직의 세포사이의 중엽부를 구성하는 불용성 Protopectin을 분해하는 효소이다. 토양으로부터 분리한 Rhizopus sp.에서 얻어진 protopectinase를 감자 및 당근 조직에 작용시켜 고유의 세포내 성분들이 함유된 파손되지 않은 단세포를 유리하였다. Protopectinase로 처리된 당근 단세포화물을 4℃에서 2주간 저장하며 색조를 관찰한 결과, 기계적 마쇄물에서는 변색이 되었으나 단세포화물에서는 변색이 되지 않았다. 또한 protopectinase로 처리된 당근 단세포화물을 121℃에서 5분간 열처리한 후 관찰한 결과, 기계적 마쇄물에서는 구성 성분들이 분층화되었으나 단세포화물에서는 변화가 보이지 않아 높은 열안정성을 나타내었다. 당근조직으로부터 제조된 단세포화물의 착즙 후 관찰된 회수율과 잔사율은 각각 93.6%와 6.4%로써, 기계적 마쇄물에서의 56.0%, 44.0%에 비하여 높은 회수율과 낮은 잔사율을 나타내었다. 이 결과는 protopectinase에 의해 제조된 단세포화물이 식품제조가공공정의 효율성 제고와 고부가가치의 기능성 식품제조에 이용될 수 있음을 의미한다. Protopectinases are heterologous group of enzymes that degrades insoluble protopectin which consists of middle lamella between cells of plant tissues. Tissues of potato and carrot could be separated to single cells by addition of protopectinase isolated from Rhizopus sp. Color changes of the suspensions treated with protopectinase and mechanically macerated after 2 weeks at 4℃, were investigated. Color change of the latter was very serious, however, that of the former was insignificant. Furthermore, after heat treatment at 121℃ for 5min, the constituents of mechanically macerted carrot suspension were separated into two layers, but those of single celled carrot were not. Yields of carrot juices extracted from single celled suspensions and mechanical maceration were 93.6% and 56.0%, respectively. These results support that treatment of protopectinase can increase yield of juices extracted from plant, and manufacture high value-added products in food processing.
식물공장에서 생산된 새싹인삼의 크기에 따른 진세노사이드 함량 및 항산화 활성 비교
황승하 ( Seung Ha Hwang ),김수철 ( Su Cheol Kim ),성진아 ( Jin A Seong ),이희율 ( Hee Yul Lee ),조두용 ( Du Yong Cho ),김민주 ( Min Ju Kim ),정재각 ( Jea Gack Jung ),정은혜 ( Eun Hye Jeong ),손기호 ( Ki-ho Son ),조계만 ( Kye Man C 한국응용생명화학회 2021 Journal of Applied Biological Chemistry (J. Appl. Vol.64 No.3
In this study, the ginseng sprout has produced through smart farm was classified according to its size and divided into above-ground (AG) and below-ground (BG) parts to compare ginsenoside contents and antioxidant activity. In the case of the AG part, the total phenolic contents were the highest at 5.16 mg/ g in medium (M) size and the lowest at 2.23 mg/g in largest (L) size. The BG part also showed the highest content in the M size, but there was no significant difference. Also, the total flavonoid contents were also high in the M size in both the AG (5.16 mg/ g) and BG (1.28 mg/g) parts. The major ginsenosides in the AG part were Re (20.33-24.15 mg/g) > Rd (11.36-27.42 mg/g) > Rg1 (4.48-5.54 mg/g) and the main ginsenosides in the BG part were Rb1 (5.09-8.61 mg/g) > Re (4.48-5.54 mg/g) > Rc (3.11-4.11 mg/ g) in orders. In the case of M size, Re and Rd were approximately 4- and 19-folds higher at 24.15 mg/g and at 27.42 mg/g in the AG part and 5.20 mg/g and 1.43 mg in the BG part, respectively. In addition, F3 and Rh1 were detected in the AG part, but not in the BG part. 2,2-diphenyl-1-picrylhydrazyl (74.95%), 2,4,6-azino-bis (3-ethylbenzothiazoline-6-sulphnoic acid) diammonium salt (94.47%), and hydroxyl (70.39%) radical scavenging activities and FRAP (2.169) assay were the highest in M size than other sizes.
황필기 ( Pil Gi Hwang ),신인수 ( In Soo Shin ),어명철 ( Myung Cheol Eu ),최철호 ( Chul Ho Choi ),이승목 ( Seung Mok Lee ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.4
The ability of iron coated starfish (ICS) to adsorb heavy metals from aqueous solution was studied with variation of factors, such as starfish dose, pH, single solute, and mixture. It was found that heavy metals removal capacity was significantly increased through iron-coating. The results show that 72.2%, 46.8%, and 22.5% of Pb, Cu, and Mn were removed by starfish, while 100% of the three metals were removed by ICS after 150 minutes. Competitive adsorption of starfish for Pb, Cu, and Mn from water was investigated by batch experiment. Starfish has the greatest affinity for Pb compared to Cu and Mn at a concentration of 100 mg/L of each metals and an interval of pH=4.5~8. Freundlich and Langmuir adsorption isotherms were utilized to describe the adsorption reaction. Adsorption isotherm results indicated that the adsorption capacity of ICS for Cu was 0.0537 mg/g and that of starfish for Cu was 0.0327 mg/g. This study shows that starfish can be converted to a useful adsorbent for heavy metals removal.