ABSTRACT
Rice straw is a potential material for bioenergy production. Elevated atmospheric carbon dioxide (CO2) concentration changed the quantity and quality of rice straw, thus changing its bioenergy production potential. In this experiment, we collected rice straw from China Free Air CO2 Enrichment Platform (FACE). Three rice varieties, Wuyunjing 27, Y Liangyou 900 and Nipponbare N16, were selected from the FACE platform (the CO2 concentration in the experimental group was controlled at 570 µmol ·mol-1, which was 200 µmol ·mol-1 higher than the control group), the chemical composition of which was analyzed. The results showed that elevated CO2 concentration significantly increased C content, C/N, and the content of non-structural carbohydrates in straw. Elevated CO2 concentration significantly increased total sugar release by 8.8%, 6.7% and 9.9% in Wuyunjing 27, Y liangyou 900 and N16, respectively. Elevated CO2 concentration significantly enhanced the biomass of N16 straw, but had no effect on the straw biomass of the other two rice varieties. The total sugar yield of N16 increased most significantly with elevated CO2 concentration, reaching 19.2%. Our results indicated that elevated CO2 concentration could improve the quality and quantity of rice straw, thereby increasing the utilization potential of biofuel.
Subject(s)
Carbon Dioxide/analysis , Oryza/chemistry , Atmosphere/chemistry , Biomass , ChinaABSTRACT
AIM: To construct the transgenic Arabidopsis thaliana containing full-length gene of mouse/human chimeric antibody(3G1MH) against Hantaan virus. METHODS: The recombinant plasmid 3G1MH-pCAMBIA2301 was transformed into Agrobacterium tumefaciens GV3101 by TSS freeze-thaw method, and then the recombinant was transferred into wild Arabidopsis thaliana by vacuum-transgenic method. The regenerated transgenic plants were selected with kanamycin, and confirmed by PCR and Northern blot. RESULTS: PCR result showed stable integration of the 3G1MH gene IN Arabidopsis thaliana genome in 7 stains of the transformed plants. Northern blot analyses confirmed the transcription of heavy and light chains in the transgenic plants. CONCLUSION: The successful establishment of 3G1MH transgenic Arabidopsis thaliana plants pave the way for further research on expressing therapeutic antibody in transgenic plants.
Subject(s)
Antigens, Viral/immunology , Arabidopsis/genetics , Gene Expression Regulation, Plant , Hantaan virus/immunology , Recombinant Proteins/immunology , Animals , Antibodies, Monoclonal/immunology , Arabidopsis Proteins/immunology , Cloning, Molecular , Genetic Vectors/genetics , Hantaan virus/genetics , Humans , Mice , Plants, Genetically Modified/growth & development , Plants, Genetically Modified/immunology , Polymerase Chain Reaction , Recombinant Proteins/geneticsABSTRACT
AIM: To express hantaan virus(HTNV) envelope glycoprotein G(2) recombinant adenovirus(Adeno-G(2)) in vero E6 cells and explore its property of inducing immune response. METHODS: Vero E6 cells were infected with the HTNV Adeno-G(2) (100 MOI). The expression of Adeno-G(2) in the infected Vero E6 cells was detected by IFA. BALB/c mice were immunized with HTNV Adeno-G(2), then the immune response to Adeno-G(2) was tested by ELISA, microcell-culture neutralizing experiment and lymphocyte proliferation test (MTT colorimetry). RESULTS: IFA detection showed the expression of Adeno-G(2) in the infected Vero E6 cells. The titer of specific antibody was 1:40; The low-titer neutralization antibody was also detected. But the lymphocyte proliferation reaction was not notable. CONCLUSION: The HTNV Adeno-G(2) can stimulate BALB/c mice to develop specific humoral immune response instead of specific cell-mediated immunity. This study provides the experimental basis for the development of gene engineering vaccine of HFRS.
