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장무웅(Moo Woong Chang),구용범(Yong Bum Koo),김한집(Han Jip Kim) 한국식물학회 1989 Journal of Plant Biology Vol.32 No.1
Polysomal polyadenylated mRNAs which were purified from pea leaves were fractionated by sucrose grandient sedimentation. Fractions corresponding to the peak at 11.5S were found to contain mostly mRNA encoding the precursor polypeptide to the small subunit of ribulose bisphosphate carboxylase (rbcS) by in vitro translation in wheat germ extract. Double-stranded cDNA which was synthesized from the 11.5S mRNA was cloned into Hind Ⅲ site of plasmid pBR 325. A cDNA clone, H24, was identified to code for rbcS. In vitro translation product of the hybridization-selected mRNA was molecular weight 20,000, presumably the precursor of rbcS. The nucleotide sequences of the H24 showed almost complete homology with the sequences encoding the transit peptide of the rbcS-3A gene which was reported by Fluht et al. (1986).
韓國春蘭 (Cymbidium goeringii)에서 分離된 菌根菌에 관한 硏究
張茂雄,鄭載東,林箕柄,金俊夏 嶺南大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.12 No.-
韓國의 自生春蘭의 根莖 및 뿌리에 있어서 菌根菌의 存在樣式, 菌根菌의 分離 및 同定, 菌根菌이 種子發芽에 미치는 影響에 대해 조사한 結果는 다음과 같다. 1. 自生春蘭의 뿌리와 根莖을 走査電子顯微鏡으로 관찰한 결과 ,뿌리와 根莖의 表面, 皮層細胞內에서 菌絲가 확인되었다. 특히 根莖의 皮層細胞內에서는 多數의 菌絲와 菌毬가 반드시 관찰되었다. 組織培養에 의해 形成된 根莖에서는 菌絲와 菌毬를 관찰할 수 없었다. 2. 春蘭의 뿌리와 根莖에서 分離된 3菌株中; KR002와 KR 003는 RHizoctonia repens로, KR 001은 RHizoctonia spp.로 同定하였다. 3. 이 3菌株를 組織培養에서 얻어진 無菌狀態가 확인된 根莖에 再接種한 結果, 皮層組織內에 菌絲의 侵入이 확인되었다. 4. 純粹培養된 KR 003의 菌株만이 春蘭의 種子發芽를 促進하였다. Mycorrhizal fungi (Rhizoctonia spp.) were isolated from the roots and rhizomes of Cymbidium goeringii collected from Kwangju and Tamyang. The results of the experiments on mycorrhizal fungi are summarized as follows. Active mycorrhizal fungi observed under scanning electron microscope were on the surface and in the cortical cells of the roots and rhizomes, and a number of undigested or partially digested peloton in the cortical cells of the rhizomes. Rhizoctonia repens group (KR 002, KR 003) and Rhizoctonia spp. (KR 001) were isolated from the roots and rhizomes of C. goeringii in Kwangju and Tamyang. In the back-inoculation test of Rhizoctonia spp., the infection of rhizomes formed by tissue culture were observed. Effects of Rhizoctonia spp.(KR 001,002,003) on the germination test of mature seeds were investigated on oat-meal agar. The promotion of germination was observed only in Rhizoctonia repens (KR003).