Based on data from 22 sample plots and applying the Canonical Correspondence Analysis （CCA）, this paper discusses the vegetation-environment relationships between the northern slope of Karlik Mountain and Naomaohu B...Based on data from 22 sample plots and applying the Canonical Correspondence Analysis （CCA）, this paper discusses the vegetation-environment relationships between the northern slope of Karlik Mountain and Naomaohu Ba- sin, which is situated in the easternmost end of the Tianshan Mountains, Xinjiang Uygur Autonomous Region, China. For the zonal vegetation, community diversity of mountain vegetation is higher than that of the desert vegetation due to environmental factors. The CCA ordination diagram revealed that the composition and distribution of vegetation types are mainly determined by altitude, soil pH and soil salt content. With increasing elevation, the soil pH and total salt content decrease but the contents of soil organic matter, soil water, total nitrogen and total phosphorus increase gradu- ally. In the CCA ordination diagrams, the sample plots and main species can be divided into five types according to their adaptations to the environmental factors. Type Ⅰ is composed of desert vegetation distributed on the low moun- tains, hills, plains and deserts below an elevation of 1900 m; type Ⅱ is distributed in the mountain and desert ecotone with an elevation of 1900-2300 m, and includes steppe desert, desert steppe and wetland meadow; type Ⅲ is very sim- ply composed of only salinized meadow; type Ⅳ is distributed above an elevation of 2300 m, containing mountain steppe, meadow steppe, subalpine meadow and alpine meadow; type Ⅴ only contains salinized meadow. The results show that with increasing elevation, species combination changes from the xerophytic shrubs, semi-shrubs and herbs distributed in the low altitude zone with arid climate to the cold-tolerant perennial herbs growing in the high altitudinal zone with cold climate.展开更多
目的探讨廊管生成素样蛋白1（angiopoietin—like protein 1，ANGPTL1）在结直肠癌中表达的临床意义及其对结直肠癌细胞生物学行为的影响。方法应用免疫组织化学检测98例配对的结直肠癌和癌旁组织中ANGPTL1蛋白表达水平,用免疫印迹和实...目的探讨廊管生成素样蛋白1（angiopoietin—like protein 1，ANGPTL1）在结直肠癌中表达的临床意义及其对结直肠癌细胞生物学行为的影响。方法应用免疫组织化学检测98例配对的结直肠癌和癌旁组织中ANGPTL1蛋白表达水平,用免疫印迹和实时定量PCR检测24对新鲜结直肠癌和配对癌旁组织中ANGPTL1蛋白和mRNA表达。检测ANGPTL1在不同转移特性的结直肠癌细胞中的表达，以及ANGPTL1干扰对结直肠癌细胞侵袭和迁移的影响。结果ANGPTL1在结直肠癌组织中表达低于癌旁正常组织（44％比76％，P〈0．01）。ANGPTL1表达与结直肠癌患者T分期（χ^2=5．766，P=0．016）、淋巴结转移（χ^2=5．571，P=0．018）及TNM分期（χ^2=7．773，P=0．005）有关。单因素分析发现，ANGPTL1阳性表达的结直肠癌患者预后良好。ANGPTL1在结直肠癌组织中蛋白和mRNA表达均高于癌旁正常组织（t=3．126，P=0．005；t=2．523，P=0．019）。ANGPTL1干扰促进HCT116结直肠癌细胞侵袭和迁移力。结论ANGFFL1在结直肠癌中呈低表达．与肿瘤T分期、淋巴结转移、TNM分期及不良预后有关。ANGPTL1抑制结直肠癌细胞的侵袭和迁移。展开更多
基金Under the auspices of National Natural Science Foundation of China(No.41171157)
文摘Based on data from 22 sample plots and applying the Canonical Correspondence Analysis （CCA）, this paper discusses the vegetation-environment relationships between the northern slope of Karlik Mountain and Naomaohu Ba- sin, which is situated in the easternmost end of the Tianshan Mountains, Xinjiang Uygur Autonomous Region, China. For the zonal vegetation, community diversity of mountain vegetation is higher than that of the desert vegetation due to environmental factors. The CCA ordination diagram revealed that the composition and distribution of vegetation types are mainly determined by altitude, soil pH and soil salt content. With increasing elevation, the soil pH and total salt content decrease but the contents of soil organic matter, soil water, total nitrogen and total phosphorus increase gradu- ally. In the CCA ordination diagrams, the sample plots and main species can be divided into five types according to their adaptations to the environmental factors. Type Ⅰ is composed of desert vegetation distributed on the low moun- tains, hills, plains and deserts below an elevation of 1900 m; type Ⅱ is distributed in the mountain and desert ecotone with an elevation of 1900-2300 m, and includes steppe desert, desert steppe and wetland meadow; type Ⅲ is very sim- ply composed of only salinized meadow; type Ⅳ is distributed above an elevation of 2300 m, containing mountain steppe, meadow steppe, subalpine meadow and alpine meadow; type Ⅴ only contains salinized meadow. The results show that with increasing elevation, species combination changes from the xerophytic shrubs, semi-shrubs and herbs distributed in the low altitude zone with arid climate to the cold-tolerant perennial herbs growing in the high altitudinal zone with cold climate.
文摘目的探讨廊管生成素样蛋白1（angiopoietin—like protein 1，ANGPTL1）在结直肠癌中表达的临床意义及其对结直肠癌细胞生物学行为的影响。方法应用免疫组织化学检测98例配对的结直肠癌和癌旁组织中ANGPTL1蛋白表达水平,用免疫印迹和实时定量PCR检测24对新鲜结直肠癌和配对癌旁组织中ANGPTL1蛋白和mRNA表达。检测ANGPTL1在不同转移特性的结直肠癌细胞中的表达，以及ANGPTL1干扰对结直肠癌细胞侵袭和迁移的影响。结果ANGPTL1在结直肠癌组织中表达低于癌旁正常组织（44％比76％，P〈0．01）。ANGPTL1表达与结直肠癌患者T分期（χ^2=5．766，P=0．016）、淋巴结转移（χ^2=5．571，P=0．018）及TNM分期（χ^2=7．773，P=0．005）有关。单因素分析发现，ANGPTL1阳性表达的结直肠癌患者预后良好。ANGPTL1在结直肠癌组织中蛋白和mRNA表达均高于癌旁正常组织（t=3．126，P=0．005；t=2．523，P=0．019）。ANGPTL1干扰促进HCT116结直肠癌细胞侵袭和迁移力。结论ANGFFL1在结直肠癌中呈低表达．与肿瘤T分期、淋巴结转移、TNM分期及不良预后有关。ANGPTL1抑制结直肠癌细胞的侵袭和迁移。
