본 논문은 漢字構形學과 漢字字體學을 이론의 근거로 삼고, 소전의 서사원소 체계에 대한 분석을 바탕으로 하여 서사원소가 소전 자체의 특징을 구현하는 방식에 대하여 묘사하였다. 소전의 자체는 고문자형체 발전의 내부적인 발전 방향에 순응하여 “整齊勻稱, 輪廓偏長, 圓轉 下垂”의 특징을 드러낸다. 9,451자소전의 자형에서 서사원소로 가장 많이 사용된 弧線과 橫線 그리고 豎線의 서사표현을 선의 형태와 선의 조합방법 등의 내용에 중점을 두고 묘사하였다. 이를 통해 소전의 주요선이 자체의 특징을 나타내기 위해 운용한 서사방법들이 상당히 성숙한 체계를 갖추고 있음을 논하였다.

To characterize CBF/DREB1-homologue in rice, nine OsDREB1 genes have been identified and characterized in this lab. Among these, it was shown that OsDREB1D was induced by drought and slightly by cold stress. We found that OsDREB1A, -1D, and -1E could up-regulate OsDhn1:LUC construct in transactivation assay using rice protoplasts. Transgenic rice plants overexpressing OsDREB1D under the maize ubiquitin promoter (Ubi:OsDREB1D) revealed an enhanced stress tolerance to drought. We also generated transgenic rice of OsDREB1D under OsPOX1 promoter (OsPOX1:OsDREB1D), which is cold stress inducible preferentially in the reproductive organs of rice. We are currently examining the mechanism of the enhanced tolerance of the transgenic plants to drought stress using both molecular physiological and biochemical techniques.

Lhx8 is a member of the LIM-homeobox transcription factor family expressed in the mouse ovary. We discovered that Lhx8 knockout females lose oocytes within 7 days after birth. Lhx8–/–ovaries fail to maintain the primordial follicles and growing follicles. Lhx8–/–ovaries misexpress numerous oocyte-specific genes such as H1foo and Nlrp14. The molecular mechanism of there gulation of Lhx8 in the oocyte has not been described. We examined to characterize Lhx8 DNA binding elements and to identify its direct target genes in the oocyte. CAST was performed using glutathione transferase Lhx8 homeodomain fusion protein (GST-LHX8HD). A 15-bp random sequence flanked by 20-bp of fixed sequences were incubated with purified GST-LHX8HD protein. Unbound DNA was washed with binding reaction buffer. Bound DNA was eluted and re-amplified by PCR for the next round of CAST. Final PCR products were cloned and sequenced to derive consensus binding sequence. EMSA was performed using 32P-labeled oligomers. Binding reactions were conducted by incubating 32P-labeled probes with purified protein. Dual luciferase assays were carried out with extracts of total HEK293 cell which was transfected by the pGL4-promoter vector containing three artificial repeats of LBE(3xLBE-Luc) and overexpression vector carrying the Lhx8 homeodomain as recommended by Promega. We identified several cis-acting sites, TGATTG as Lhx8 DNA binding elements (LBE) using a library of randomly generated oligonucleotides by CAST. EMSA reslut shows that Lhx8 preferentially binds to the oligomer including Lhx8 binding element (TGATTG) with high affinity. In addition, we found that the relative luciferase activity of reporter construct containing three copies of TGATTG was increased by 2.3-fold with Lhx8 overexpression. These results suggest that Lhx8 preferentially binds Lhx8 DNA binding element, TGATTG, and can transactivate reporter genes through the LBE. The transcription of Lhx8 target gene in oocytes directly might be regulated by its during early folliculogenesis.