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| 1 | Overexpression of micro RNA_(40)8 enhances photosynthesis, growth, and seed yield in diverse plants显示文摘The ability of a plant to produce grain, fruit, or forage depends ultimately on photosynthesis. There have been few attempts, however, to study micro RNAs, which are a class of endogenous small RNAs post-transcriptionally programming gene expression, in relation to photosynthetic traits. We focused on miR_(40)8, one of the most conserved plant miRNAs, and overexpressed it in parallel in Arabidopsis, tobacco, and rice. The transgenic plants all exhibited increased copper content in the chloroplast, elevated abundance of plastocyanin,and an induction of photosynthetic genes. By means of gas exchange and optical spectroscopy analyses, we showed that higher expression of miR_(40)8 leads to enhanced photosynthesis through improving efficiency of irradiation utilization and the capacity for carbon dioxide fixation. Consequently, miR_(40)8 hyper-accumulating plants exhibited higher rate of vegetative growth. An enlargement of seed size was also observed in all three species overproducing miR_(40)8. Moreover, we conducted a 2-year-two-location field trial and observed miR_(40)8 overexpression in rice significantly increased yield, which was primarily attributed to an elevation in grain weight. Taken together, these results demonstrate that miR_(40)8 is a positive regulator of photosynthesis and that its genetic engineering is a promising route for enhancing photosynthetic performance and yield in diverse plants. | Jiawei Pan Dahui Huang Zhonglong Guo Zheng Kuang He Zhang Xinyu Xie Zengfeng Ma Shaopei Gao Manuel T.Lerdau Chengcai Chu Lei Li | 2018 | Journal of Integrative Plant Biology2018，60，4： | 8 |
| 2 | Identification of Major Locus Bph35 Resistance to Brown Planthopper in Rice显示文摘An introgression line RBPH660,derived from wild rice Oryza rufipogon,showed stable resistance to brown planthopper(BPH).Segregation analysis indicated BPH resistance of RBPH660 was controlled by multiple genes/QTLs.By using the bulked segregant analysis(BSA)-seq method,two genomic regions harboring QTLs resistance to BPH were identified from 1.20 to 16.70 Mb on chromosome 4 and from 10.20 to 12.60 Mb on chromosome 9 in RBPH660,respectively.A major resistance locus,designated as Bph35 accounting for 51.27%of the phenotypic variation with a LOD score of 42.51,was mapped to the candidate region of chromosome 4 between In Del(insertion-deletion)markers PSM16 and R4 M13.For fine mapping of Bph35,one simple sequence repeat and three newly developed In Del markers were used to screen the recombinants.Finally,the Bph35 locus was delimited in the region from 6.28 to 6.93 Mb and there were 18 predicted protein-encoding genes with a total of 114 non-synonymous single nucleotide polymorphism(SNP)variant sites between the resistant and susceptible parents.Out of these genes,Os04 g0193950,encoding a putative NB-ARC(nucleotidebinding adaptor shared by APAF-1,R proteins and CED-4)and LRR(leucine-rich repeat)domain protein with nine non-synonymous SNP substitutions in its coding sequence regions,might be the candidate gene for Bph35.These findings would facilitate the map-based cloning of the Bph35 gene and development of resistant varieties against BPH in rice. | ZHANG Yuexiong QIN Gang MA Qianqian WEI Minyi YANG Xinghai MA Zengfeng LIANG Haifu LIU Chi LI Zhenjing LIU Fang HUANG Dahui LI Rongbai | 2020 | Rice science2020，27，3： | 3 |
| 3 | Investigation of a novel biomarker, neuropilin-1, and its application for poor prognosis in acute myeloid leukemia patients显示文摘 | Jianqiang Zhao Liufang Gu Chengliang Li Weiguo Ma Zengfeng Ni | 2014 | Tumor Biology2014，，： | 1 |
| 4 | Analysis of Hydrocarbon Mixture Performance of a Dual-Channel Swirl Engine显示文摘In order to understand and improve the oil and gas mixing performance of a dual-channel vortex chamber diesel engine,the BH175F dual-channel vortex chamber combustion system was used as the research foundation,and the oil-gas mixture process of the combustion system was numerically analyzed.By analyzing the cylinder temperature,cylinder pressure,mixing process and combustion process of the combustion system,the mixture performance of the combustion system was studied.Results indicated that:The mixture of the compression Top Dead Center(TDC)started to enter the main combustion chamber through the start-up hole;when the piston reached 4°After Top Dead Center(ATDC),the mixture started to enter the main combustion chamber through the connecting channels A and B,and the high-concentration mixture entered the main combustion from the start-up hole;when the piston continued running down to 20°and 25°ATDC,it could be seen that the main combustion chamber mixture was already relatively uniform;besides,when the equivalence ratio was between 0.8 and 1,the air-ftiel mixture was unevenly distributed in the main combustion chamber.It provides guidance for further improvement of the combustion system. | YUAN Wenhua HUANG Qilin FU Jun LIAO Jingjing LI Yu HE Yong ZHANG Zengfeng MA Yi | 2020 | Journal of Thermal Science2020，29，6： | 1 |
| 5 | TNFα inhibitor C87 sensitizes EGFRvⅢ transfected glioblastoma cells to gefitinib by a concurrent blockade of TNFα signaling显示文摘Objective: More than half of human glioblastomas show EGFR gene amplification and mutation, but EGFR inhibitors have not been effective in treating EGFR-positive glioblastoma patients.The mechanism behind this type of primary resistance is not well understood.The aim of this study was to investigate gefitinib resistance in glioblastoma, and explore ways to circumvent this significant clinical problem.Methods: MTT method was used to test the cell viability after EGFR-positive glioblastoma cells were treated with indicated drugs;real-time quantitative PCR method was included to detect the TNFα mRNA levels in glioma tissues and cell lines.ELISA was introduced to measure the TNFα protein levels in cell culture supernatant of glioblastoma cells treated with gefitinib.Western blot was used to detect the activity change of intracellular kinases in drug-treated glioblastoma cells.Two mouse xenograft tumor models were carried out to evaluate the in vivo effects of a combination of EGFR and TNFα inhibitors.Results: We found that glioblastoma resistance to gefitinib may be mediated by an adaptive pro-survival TNFα-JNK-Axl signaling axis, and that high TNFα levels in the glioblastoma microenvironment may further intensify primary resistance.A combination of the TNFα-specific small-molecule inhibitor C87 and gefitinib significantly enhanced the sensitivity of glioblastoma cells to gefitinib in vitro and in vivo.Conclusions: Our findings provide a possible explanation for the primary resistance of glioblastoma to EGFR inhibitors and suggest that dual blockade of TNFα and EGFR may be a viable therapeutic strategy for the treatment of patients with chemotherapy-refractory advanced glioblastoma. | Li Ma Chunhua She Qian Shi Qiang Yin Xinxin Ji Yongrong Wang Yulong Fan Xinyao Kong Peng Li Zengfeng Sun Xiaohui Zhang Zhen Zhang Jian Wang Tong Wang Yuanfu Xu Wenliang Li | 2019 | Cancer Biology & Medicine2019，16，3： | 1 |
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