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버드나무 ( Salix koreensis ) 현탁배양 (懸濁培養) 세포의 대사산물
박용구(Young Goo Park),신동일(Dong Ill Shin),이상구(Sang Goo Lee) 한국산림과학회 1989 한국산림과학회지 Vol.78 No.2
Cell suspension cultures for Salix koreensis was well established at the supplements of 2, 4-D with cytokinin particulary the combination of 1.0 ㎎/ℓ 2, 4-D with 0.1 ㎎/ℓ of zeatin. These combined rates of phytohormones are also effective to callus induction from S, koreensis leaf and its multiplication. Cultured media exhibited the great inhibitory effect on the germination of rice, barnyard grass and lettuce seeds, indicating the presence of biologically active substances in media. Several phenolic compounds such as pyrogallol, sinapic acid, cinnamic acid, tannic + gallic and p-chlorobenzoic acid were detected in the cell suspension culture. The inhibitory effect exhibited by cultured media may be partly attributed to these phenalic compounds.
몇가지 삼림수종 (森林樹種) 종자발아에 (種子發芽) 대한 낙엽송엽 (落葉松葉) 추출물의 Allelopathic 효과
박용구,강군수,신동일 ( Young Goo Park,Goon Su Kang,Dong Ill Shin ) 한국산림과학회 1988 한국산림과학회지 Vol.77 No.1
Inhibitory effect of L. leptolepis fallen leaf extracts on the germination of Pinus densiflora, × Pinus rigitaeda, Pinus rigida, Pinus thunbergii and Larix leptolepis was investigated. Germination of those seeds in culture room and in pot at field showed the highly significant inhibitory effects by the aqueous extracts from L. leptolepis fallen leaves. Among them L. leptolepis was the most severely inhibited by the aqueous extracts used. To identify allelopathic substances, thin-layer chromatography was employed. Gallic, ferulic, t-cinnamic and vanillic acids were identified from fallen leaves of L. leptolepis. From the results, it is assumed that autotoxicity of L . leptolepis may act as inhibitory factors on germination of the species in natural stands.
종의 포플라수종에서 리그닌생합성에 관계된 OMT유전자의 발현
박용구,박희성,최장원,설일환,정일경,신동일,Park, Young-Goo,Park, Hee Sung,Choi, Jang Won,Sul, Ill Whan,Chung, Il Kyung,Shin, Dong Ill 한국생명과학회 1998 생명과학회지 Vol.8 No.4
We analyzed lignin content and wxpression of OMT gene during growth season in two hybrid poplar species. OMT gene expression was observed mainy in the developing secondary xylem where major quantity of lignin occurs. Lignin content in the xylem tissue increased as plant resumed growth in the spring and reached the highest in the late August. Change in lignin content was concurrent with that of OMT gene expression, indicating OMT is a key enzyme in lignin biosynthesis. 리그닌함량이 감소한 펄프소재의 육성을 위해 OMT유전자와 리그닌생합성 간의 관계를 2종의 포플라 수종을 이용하여 실험하였다. OMT유전자의 발현은 리그닌생합성이 가장 많이 일어나는 developing secondary xylem에서 높앗다. 이 사부조직에서의 리그닌함량의 증가는 봄에 성장을 개시할 때부터 증가하기 시작하여 8월 말 경에 가장 높았다. 이러한 리그닌의 증가는 OMT유전자의 발현 증가와 일치하였으며, 이는 OMT유전자가 리그닌생합성에서 매우 중요한 역할을 함을 나타내는 것이다.
Seasonal Expression of OMT Gene in Relation to Lignin Biosynthesis in two Popular Species
박영구,박희성,최장원,설일환,정일경,김정화,신동일 한국생명과학회 1998 한국생명과학회 학술발표회 Vol.20 No.-
We analyzed lignin content and expression of OMT gene during growth season in two hybrid poplar species. OMT gene expression was observed mainy in the developing secondary xylem where major quantity of lignin occurs. Lignin content in the xylem tissue increased as plant resumed growth in the spring and reached the highest in the late August. Change in lignin content was concurrent with that of OMT gene expression, indicating OMT is a key enzyme in lignin biosynthesis.
버드나무 (Salix Koreensis) 현탁배양 세포의 대사산물
박용구,이상구,신동일 경북대학교 유전공학연구소 1995 遺傳工學硏究所報 Vol.10 No.1
Cell suspension cultures for Salix koreensis was well established at the supplements of 2, 4-D with cytokinin particulary the combination of 1.0 ㎎/ℓ 2, 4-D with 0.1 ㎎/ℓ of zeatin. These combined rates of phytohormones are also effective to callus induction from S. koreensis leaf and its multiplication. Cultured media exhibited the great inhibitory effect on the germination of rice, barnyard grass and lettuce seeds, indicating the presence of biologically active substances in media. Several phenolic compounds such as pyrogallol, sinapic acid, cinnamic acid, tannic + gallic and p-chlorobenzoic acid were detected in the cell suspension culture. The inhibitory effect exhibited by cultured media may be partly attributed to these phenolic compounds.
은백양 (Populus alba) 엽육조직에서 원형질체 분리
손성호,박용구,우종호,설일환,신동일 경북대학교 유전공학연구소 1995 遺傳工學硏究所報 Vol.10 No.1
Factors affecting the isolation of protoplasts from mesophyll were investigated in P. alba. The yield of mesophyll protoplasts was obtained using leaves in vitro in 2.0% Cellulase R-10, 0.8% Macerozyme R-10, 1.2% Hemicellulase, 2.0% Driselase, 0.05% Pectolyase Y-23, and 0.6M mannitol in addition to DTT and MES buffer adjusted pH 5.6. Over 11.0×10^6 protoplasts per gram of leaf were produced using the condition. For protoplasts purification, the most favorable sucrose concentration of floating solution was 0.6M after washing them by CPW solution. This method of screening factors affecting protoplast isolation could be applicable to other species.
이태리 포푸라 엽육조직에서의 원형질체분리에 미치는 몇가지 요인
손성호,박용구,우종호,신동일 경북대학교 유전공학연구소 1986 遺傳工學硏究所報 Vol.1 No.1
A method of isolating Populus euramericana cv. I-214 mesophyll protoplast was developed to facilitate the eventual use of genetic engineering techniques in this species. The suitable medium for shoot multiplication an vitro was MS basal medium with 0.1㎎/1 BAP. The effects of several factors influencing protoplast isolation could be evaluated quickly by using leaves in vitro and know volumes of maceration and washing media. The best yields of mesophyll protoplasts were obtained using leaves do vitro in 2.0% Cellulase R-10, 0.8% Macerozyme R-10, 1.2% Hemicellulase, 2.0% Driselase, 0.05% Pectolyase Y-23, and 0.6M mannitol in addition to DTT and MES buffer adjusted pH 5.6. Over 2.4×10^6 protoplasts per gram of leaves were produced using these condition. For protoplast purification, the most favorable sucrose concentration of floating solution was 0.6M after washing them by CPW solution.