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Qingnan Hu,Li Yang,Shanda Liu,Limei Zhou,Xutong Wang,Wei Wang,Ling Cai,Xiuju Wu,Ying Chang,Shucai Wang 한국식물학회 2016 Journal of Plant Biology Vol.59 No.5
Single-repeat R3 MYB transcription factors (R3 MYBs) regulate epidermal cell fate determination in Arabidopsis through a lateral inhibition mechanism. Previously we have shown that poplar R3 MYB genes regulate trichome formation when expressed in Arabidopsis. Here we report the identification and functional characterization of a poplar R3 MYB-like protein, Populus trichocarpa R3 MYB-LIKE1 (PtrRML1). So far all the MYB transcription factors identified have a highly conserved N-terminal DNA-binding domain composed of MYB repeats and a highly variable C-terminal domain. However, PtrRML1 has a single R3 MYB repeat at its C-terminal and an LxLxL repressor motif-containing N-terminal, and with amino acids about twice of that of the known R3 MYBs. PtrRML1 is localized in nuclear in transgenic Arabidopsis plants expressing PtrRML1-GFP. PtrRML1 repressed reporter gene expression in protoplasts, and it interacted with GL3 in plant cells. Expression of PtrRML1 in Arabidopsis resulted in glabrous phenotypes, increased number of root hairs, and decreased anthocyanin accumulation. Consist with these observation, the expression levels of some MBW component genes and some of their target genes involved in the regulation of epidermal cell fate determination and anthocyanin biosynthesis, including TRY, CPC, ETC1, GL1, GL2, DFR, UF3GT and TT8 were reduced in the transgenic plants.
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Immune Effect of Newcastle Disease Virus DNA Vaccine with C3d as a Molecular Adjuvant
( Kai Zhao ),( Xutong Duan ),( Lianwei Hao ),( Xiaohua Wang ),( Yunfeng Wang ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 Journal of microbiology and biotechnology Vol.27 No.11
Newcastle disease is a serious infectious disease in the poultry industry. The commercial vaccines can only offer limited protection and some of them are expensive and need adjuvants. At present, DNA vaccines are widely used. However, the immune responses induced by DNA vaccines are too slow and low. Here, we constructed the transfer vectors with a different number of C3d as molecular adjuvants (n = 1, 2, 4, or 6), and the vectors were cloned into the optimal eukaryotic expression plasmid (pVAXI-optiF) that expressed the F gene of Newcastle disease virus (NDV), and named pVAXI-F(o)-C3d1, pVAXI -F(o)-C3d2, pVAXI-F(o)-C3d4, and pVAXI-F(o)-C3d6, respectively. Cell transfection test indicated that pVAXI-F(o)-C3d6 showed the highest expression. In vivo immunization showed that the chickens immunized with pVAXI-F(o)-C3d6 intramuscularly induced better immune responses than the chickens immunized with the other plasmids. The protective efficacy of pVAXI-F(o)-C3d6 was 80% after challenge with the highly virulent NDV strain F48E9. The results in this study showed that C3d6 could be used as a molecular adjuvant to quickly induce an effective immune response to control NDV.
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Sustainable Development of Indonesia`s Agricultural Sector
( Eng Seng Chia ),( Dongyu Li ),( Xutong Ma ),( Jixi Wang ),( Yiting Wang ),( Jiaxu Zhu ) 한국시스템다이내믹스학회 2016 한국시스템다이내믹스 연구 Vol.17 No.4
The Indonesian agricultural output has been struggling to provide for the demand of the rising population in recent years owing to the sluggish growth rate in this sector as compared to the overall performance of the economy. While the current slash-and-burn technique widely employed by Indonesian peasants is able to boost the output in the short term, its negative implications on the environment and the constraints in available forest area casts doubts to its sustainability in the long run. As the results from our iThink model simulation has illustrated, the output will cease increasing and decline in about 90 years” time due to the drastic drop in forest coverage. Based on the sensitivity analysis of the affecting factors, three policy amendments are proposed to avert the gloomy perspective, namely increasing funding for Research and Development, curbing burning activities, and actively returning abandoned land to forests. With the effective implementation of the suggested policies, the growth in the agricultural sector will be steered back to a sustainable track, which is further confirmed by the model projection.
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