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学者姓名：洪璋
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Abstract ：
Cadmium (Cd) is one of the most toxic environmental pollutants affecting the growth and reproduction of various plants. Analysis of the biological adaptation and tolerance mechanisms of the hyperaccumulator Erigeron annuus to Cd stress may help identify new plant species for phytoremediation and in optimizing the process. This study is to the first to analyze the molecular composition and diversity of dissolved organic matter (DOM) secreted by roots using FT-ICR MS, and multiple physiological and biochemical indexes of E. annuus seedlings grown in solutions containing 0-200 Cd mu mol L-1. The results showed that E. annuus had strong photosynthetic adaptation and protection ability under Cd stress. Cd was immobilized or compartmentalized by cell walls and vacuoles in the plant, thus alleviating Cd stress. Activation of anti-oxidation defense mechanisms also played an important role in alleviating or eliminating Cd toxicity in E. annuus. High Cd stress promoted production of a higher proportion of new molecules in DOM secreted by E. annuus roots compared to low Cd stress. DOM secreted by roots contributed to plant resistance to Cd-induced stress via producing more carbohydrates, aromatic structures and tannins. Results indicate the mechanisms underpinning the potential use of E. annuus as a phytoremediator in environments with moderate Cd pollution.
Keyword ：
Antioxidants Antioxidants Cadmium stress Cadmium stress Dissolved organic matter Dissolved organic matter FT-ICR MS FT-ICR MS Proline Proline
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| GB/T 7714 | Zhang, Hong , Heal, Kate , Zhu, Xiangdong et al. Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate [J]. | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY , 2021 , 219 . |
| MLA | Zhang, Hong et al. "Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate" . | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 219 (2021) . |
| APA | Zhang, Hong , Heal, Kate , Zhu, Xiangdong , Tigabu, Mulualem , Xue, Yanan , Zhou, Chuifan . Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate . | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY , 2021 , 219 . |
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Arabidopsis nuclear- and chloroplast-localized WHIRLY1 adjusts SA content in cells via ICS1, PAL1, and BSMT1 to regulate plant senescence in a developmental-dependent manner. Salicylic acid (SA) influences developmental senescence and is spatiotemporally controlled by various mechanisms, including biosynthesis, transport, and conjugate formation. Altered localization of Arabidopsis WHIRLY1 (WHY1), a repressor of leaf natural senescence, in the nucleus or chloroplast causes a perturbation in SA homeostasis, resulting in adverse plant senescence phenotypes. WHY1 loss-of-function mutation resulted in SA peaking 5 d earlier compared to wild-type plants, which accumulated SA at 42 d after germination. SA accumulation coincided with an early leaf-senescence phenotype, which could be prevented by ectopic expression of the nuclear WHY1 isoform (nWHY1). However, expressing the plastid WHY1 isoform (pWHY1) greatly enhanced cellular SA levels. Transcriptome analysis in the WHY1 loss-of-function mutant background following expression of either pWHY1 or nWHY1 indicated that hormone metabolism-related genes were most significantly altered. The pWHY1 isoform predominantly affected stress-related gene expression, whereas nWHY1 primarily controlled developmental gene expression. Chromatin immunoprecipitation-quantitative PCR assays indicated that nWHY1 directly binds to the promoter region of isochorismate synthase1 (ICS1), thus activating its expression at later developmental stages, but that it indirectly activates S-adenosyl-l-Met-dependent methyltransferase1 (BSMT1) expression via ethylene response factor 109 (ERF109). Moreover, nWHY1 repressed expression of Phe ammonia lyase-encoding gene (PAL1) via R2R3-MYB member 15 (MYB15) during the early stages of development. Interestingly, rising SA levels exerted a feedback effect by inducing nWHY1 modification and pWHY1 accumulation. Thus, the alteration of WHY1 organelle isoforms and the feedback of SA are involved in a circularly integrated regulatory network during developmental or stress-induced senescence in Arabidopsis.
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| GB/T 7714 | Lin, Wenfang , Zhang, Hong , Huang, Dongmei et al. Dual-Localized WHIRLY1 Affects Salicylic Acid Biosynthesis via Coordination of ISOCHORISMATE SYNTHASE1, PHENYLALANINE AMMONIA LYASE1, and S-ADENOSYL-L-METHIONINE-DEPENDENT METHYLTRANSFERASE1 [J]. | PLANT PHYSIOLOGY , 2020 , 184 (4) : 1884-1899 . |
| MLA | Lin, Wenfang et al. "Dual-Localized WHIRLY1 Affects Salicylic Acid Biosynthesis via Coordination of ISOCHORISMATE SYNTHASE1, PHENYLALANINE AMMONIA LYASE1, and S-ADENOSYL-L-METHIONINE-DEPENDENT METHYLTRANSFERASE1" . | PLANT PHYSIOLOGY 184 . 4 (2020) : 1884-1899 . |
| APA | Lin, Wenfang , Zhang, Hong , Huang, Dongmei , Schenke, Dirk , Cai, Daguang , Wu, Binghua et al. Dual-Localized WHIRLY1 Affects Salicylic Acid Biosynthesis via Coordination of ISOCHORISMATE SYNTHASE1, PHENYLALANINE AMMONIA LYASE1, and S-ADENOSYL-L-METHIONINE-DEPENDENT METHYLTRANSFERASE1 . | PLANT PHYSIOLOGY , 2020 , 184 (4) , 1884-1899 . |
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Objective: In this study, soil samples of Chinese fir plantations were collected to study the effects of biochar with different preparation materials and preparation temperatures on soil bacterial community structure and diversity through soil culture experiments in laboratory. The purpose of this study was to provide scientific basis for improving acid red soil in southern China and rational application of biochar. Method: The V3+V4 region of 16S rDNA sequence of soil bacteria, amplified by PCR, was determined by high-throughput sequencing technique after 80 days of culture in the following different media: original soil with 3% Chinese fir leaf biochar produced at temperature of 300 (BL300) and 600 (BL600), original soil with 3% Chinese fir wood chip biochar produced at temperature of 300(BW300) and at temperature of 600 (BW600), and original soil only (served as control). Result: The OUT-Wayne diagram analysis showed that the soil bacteria abundance with BL300 was higher than that of the control, while the abundance of other biochar treatments was lower. The results of PcoA analysis, Beta diversity analysis and UPGMA cluster analysis showed that the community structure and diversity of soil bacteria of fir leaf biochar treatment were significantly different from those of the control, among which BL600 was the most different from the control. The results of adding wood chip biochar were similar to those of control. The addition of biochar had a certain effect on the structure and function of soil bacteria at different species levels, among which the treatment of fir leaf biochar had very significant effect on the abundance of dominant bacterial species, and the treatment of the wood chip biochar had a relatively small effect on dominant bacteria. Conclusion: The addition of BL300 biochar increased the abundance of soil bacteria, while other biochar treatments reduced the abundance of bacteria. Different raw materials and temperatures had effects on biochar. Because of the insufficient available nitrogen of fir wood chip biochar, the effect of Chinese fir leaf biochar on soil bacterial structure and diversity was more significant than fir wood chip biochar. The content of high-temperature biochar ash was more, so the influence on bacterial diversity was greater. Different soil bacterial populations have different living habits and functions, and the utilization degree of biochar components is different, so adding biochar can change the relative abundance of dominant populations in soil and the overall function of soil bacterial community. © 2019, Editorial Department of Scientia Silvae Sinicae. All right reserved.
Keyword ：
Bacteria Bacteria Cluster analysis Cluster analysis Nitrogen Nitrogen Polymerase chain reaction Polymerase chain reaction Soils Soils Wood products Wood products
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| GB/T 7714 | Hu, Huaying , Zhang, Hong , Cao, Sheng et al. Effects of Biochar Application on Soil Bacterial Community Structure and Diversity in Cunninghamia lanceolata Plantations [J]. | Scientia Silvae Sinicae , 2019 , 55 (8) : 184-193 . |
| MLA | Hu, Huaying et al. "Effects of Biochar Application on Soil Bacterial Community Structure and Diversity in Cunninghamia lanceolata Plantations" . | Scientia Silvae Sinicae 55 . 8 (2019) : 184-193 . |
| APA | Hu, Huaying , Zhang, Hong , Cao, Sheng , Yin, Danyang , Zhou, Chuifan , He, Zongming . Effects of Biochar Application on Soil Bacterial Community Structure and Diversity in Cunninghamia lanceolata Plantations . | Scientia Silvae Sinicae , 2019 , 55 (8) , 184-193 . |
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TiO2 microspheres were synthesized by electrospinning technique. The morphology, structure and photocatalytic performance in the degradation of methylene blue under UV light irradiation were characterized by scanning electron microscopy, X-ray diffraction spectroscopy and UV-visible absorption spectrophotometer. The results show that TiO2 microspheres have a high anatase phase content and their surface is assembled by large quantities of TiO2 nanoparticles, resulting in a porous structure. These TiO2 microspheres exhibit an excellent photocatalytic performance with a maximum degradation rate of 95.6 %, much higher than that for TiO2 rods (77.9 %) synthesized by electrospinning technique.
Keyword ：
Electrospinning Electrospinning Microsphere Microsphere Photocatalysis Photocatalysis TiO2 TiO2
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| GB/T 7714 | Zhang, Hong , Liu, Xinjuan , Sun, Zhuo . Electrospun TiO2 Microspheres with Enhanced Activity for Photocatalytic Degradation of Methylene Blue [J]. | ASIAN JOURNAL OF CHEMISTRY , 2013 , 25 (12) : 6963-6967 . |
| MLA | Zhang, Hong et al. "Electrospun TiO2 Microspheres with Enhanced Activity for Photocatalytic Degradation of Methylene Blue" . | ASIAN JOURNAL OF CHEMISTRY 25 . 12 (2013) : 6963-6967 . |
| APA | Zhang, Hong , Liu, Xinjuan , Sun, Zhuo . Electrospun TiO2 Microspheres with Enhanced Activity for Photocatalytic Degradation of Methylene Blue . | ASIAN JOURNAL OF CHEMISTRY , 2013 , 25 (12) , 6963-6967 . |
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Abstract ：
从教务管理在高校教学管理工作中的地位和作用 ,教务管理人员应当具备的素质两方面入手 ,针对当前教务管理队伍中存在的问题 ,如何加强这支队伍建设作一些探讨。
Keyword ：
教务管理 教务管理 队伍建设 队伍建设 高等教育 高等教育
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| GB/T 7714 | 洪璋 . 高校教务管理队伍建设的探讨 [J]. | 福建农林大学学报(哲学社会科学版) , 2002 , (04) : 85-87 . |
| MLA | 洪璋 . "高校教务管理队伍建设的探讨" . | 福建农林大学学报(哲学社会科学版) 04 (2002) : 85-87 . |
| APA | 洪璋 . 高校教务管理队伍建设的探讨 . | 福建农林大学学报(哲学社会科学版) , 2002 , (04) , 85-87 . |
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