| 1 | Transcription factor WRKY22 regulates canker susceptibility in sweet orange (Citrus sinensis Osbeck) by enhancing cell enlargement and CsLOB1 expression显示文摘Pathological hypertrophy(cell enlargement)plays an important role in the development of citrus canker,but its regulators are largely unknown.Although WRKY22 is known to be involved in pathogen-triggered immunity and positively regulates resistance to bacterial pathogens in Arabidopsis,rice and pepper,the CRISPR/Cas9-mediated partial knockout of CsWRKY22 improves resistance to Xanthomonas citri subsp.citri(Xcc)in Wanjincheng orange(Citrus sinensis Osbeck).Here,we demonstrate that CsWRKY22 is a nucleus-localized transcriptional activator.CsWRKY22-overexpressing plants exhibited dwarf phenotypes that had wrinkled and thickened leaves and were more sensitive to Xcc,whereas CsWRKY22-silenced plants showed no visible phenotype changes and were more resistant to Xcc.Microscopic observations revealed that the overexpression of CsWRKY22 increased cell size in the spongy mesophyll.Transcriptome analysis showed that cell growth-related pathways,such as the auxin and brassinosteroid hormonal signaling and cell wall organization and biogenesis pathways,were significantly upregulated upon CsWRKY22 overexpression.Interestingly,CsWRKY22 activated the expression of CsLOB1,which is a key gene regulating susceptibility to citrus canker.We further confirmed that CsWRKY22 bound directly to the W-boxes just upstream of the transcription start site of CsLOB1 in vivo and in vitro.We conclude that CsWRKY22 enhances susceptibility to citrus canker by promoting host hypertrophy and CsLOB1 expression.Thus,our study provides new insights into the mechanism regulating pathological hypertrophy and the function of WRKY22 in citrus. | Qin Long Meixia Du Junhong Long Yu Xie Jingyun Zhang Lanzhen Xu Yongrui He Qiang Li Shanchun Chen Xiuping Zou | 2021 | Horticulture Research2021，8，1： | 5 |
| 2 | N-doped porous graphene for carbon dioxide separation:a molecular dynamics study显示文摘Using molecular dynamics simulations,it is shown that N-doped porous graphene membrane can efficiently separate CO2from the CO2/CH4mixture.The effects of pore rim modifications,N-doping sites,initial gas pressure,and feed gas compositions on CO2separation performance of N-doped porous graphene membrane are also examined.It is found that gas permeability increases with increasing initial gas pressure or the feed gas percentages.Pore rim modifications with nitrogen atoms(pyridinic N)can significantly improve the selectivity of CO2over CH4owing to the enhanced electrostatic interactions compared to the unmodified one,and the all-N-modified pore-16 shows the highest CO2selectivity over CH4(*29).Doping N atoms on the graphene sheets(quaternary N)has little effect on the CO2selectivity.Our study demonstrates that the N-doped porous graphene is an excellent candidate for CO2separation,which may be beneficial for the realization of a low carbon society. | Qingzhong Xue Meixia Shan Yehan Tao Zilong Liu Cuicui Ling Yonggang Du | 2014 | Chinese Science Bulletin2014，59，29： | 3 |
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