In order to evaluate the regulating effect of ＂ aquatic environment protection oriented fishery＂ on aquatic ecosystem,the water quality,plankton community structure,biomass,diversity index,eutrophication index and e...In order to evaluate the regulating effect of ＂ aquatic environment protection oriented fishery＂ on aquatic ecosystem,the water quality,plankton community structure,biomass,diversity index,eutrophication index and ecosystem maturity evaluated with Ecopath model were compared from 2010 to 2012 in Qiaodun Reservoir of Zhejiang Province. It was indicated that the water quality had been improved obviously. The water transparency maximally increased by 130%,while TP,TN and CODCrwere reduced. The density and biomass of the plankton were decreased,so was the ratio of Cynobacteria in phytoplankton community. The Shannon-Weaver index was increased; the trophic level was decreased; the ecosystem maturity was improved. By all accounts,the ＂ aquatic environment protection oriented fishery＂ had positive effects on maintaining the balance of reservoir ecosystem and ensuring the safety of drinking water.展开更多
预执行帮助线程在预取过程中需要进行动态预取调节,而传统静态枚举控制参数值的控制方法在预取执行过程中保持固定不变,从而使得该方法不能够有效地为主线程提供预取质量保证(quality of service,Qo S)。针对该问题,提出了一种基于交织...预执行帮助线程在预取过程中需要进行动态预取调节,而传统静态枚举控制参数值的控制方法在预取执行过程中保持固定不变,从而使得该方法不能够有效地为主线程提供预取质量保证(quality of service,Qo S)。针对该问题,提出了一种基于交织预取率的帮助线程预取质量参数调节方法。首先,对帮助线程的预取Qo S优化进行了建模分析;其次,在前期交织预取工作的基础上,提出了基于交织预取率的帮助线程参数值调节算法;最后,在真实的商用多核平台上对所提出帮助线程预取调节算法进行了评测和分析。实验结果是所提出的帮助线程预取调节算法使得基准测试程序的几何平均性能加速比为1. 114,而传统静态枚举方法的几何平均性能加速比为1. 135。实验结果表明,所提出的帮助线程预取质量调节算法解决了帮助线程预取过程中的参数值自动调节问题,算法无须静态枚举参数值便可以快速获得与之相近似的预取性能提升。展开更多
为了研究引起水稻叶片卷曲的分子机理,鉴定出新的水稻卷叶基因.用60Co-γ射线辐射诱变籼稻品种镇恢084,获得一份卷叶矮化突变体材料,命名为rld(rolling leaf and dwarf).通过形态学分析水稻表型,石蜡切片观察叶片细胞组织形态,图位克隆...为了研究引起水稻叶片卷曲的分子机理,鉴定出新的水稻卷叶基因.用60Co-γ射线辐射诱变籼稻品种镇恢084,获得一份卷叶矮化突变体材料,命名为rld(rolling leaf and dwarf).通过形态学分析水稻表型,石蜡切片观察叶片细胞组织形态,图位克隆和测序技术进行精细定位和确定目的基因,生物信息学分析蛋白序列结构.结果显示:rld突变体叶片极度内卷,株高降低,穗长变短,结实率降低;rld突变体叶片维管束间的下表皮叶肉细胞面积增大;rld基因精细定位在标记Indel2和Indel5间的32.3kb的物理区间,测序发现rld是调控卷叶基因RL9的一个新等位基因,由于外显子上精氨酸缺失引起rld基因编码的蛋白空间结构发生改变.推测精氨酸在RL9蛋白的正常功能行使过程中是必要的,对维持水稻叶片表型具有至关重要的作用.展开更多
In this study, three cDNA sequences corresponding to cytochrome P450 C17(CYP17 Ⅰ), 3β-hydroxysteroid dehydrogenase(3β-HSD) and androgen receptor(AR) were isolated from spotted sea bass(Lateolabrax maculatus). The m...In this study, three cDNA sequences corresponding to cytochrome P450 C17(CYP17 Ⅰ), 3β-hydroxysteroid dehydrogenase(3β-HSD) and androgen receptor(AR) were isolated from spotted sea bass(Lateolabrax maculatus). The mRNA abundances of CYP17 Ⅰ and 3β-HSD increased from stage Ⅱ to stage V with a significant increase at stage Ⅴ, and the highest abundance of AR mRNA was detected at stage Ⅲ in testicular development cycle. CYP17 I, 3β-HSD and AR transcripts were obviously abundant in steroidogenesis tissues such as testis, brain, head kidney among others. Strong and positive signals were observed mainly in interstitial cell regions of L. maculatus testis as were measured with in situ hybridization method. Significant increases of CYP17 Ⅰ and3β-HSD transcripts were detected after 12-48 h hCG(human chorionic gonadotropin) and GnRHa(gonadotropin-releasing hormone analogue) treatments. However, an opposite relationship was found for AR in testis at the same time. In addition, decreasing trends of CYP17 Ⅰ and 3β-HSD mRNA were observed in testis of L. maculatus in freshwater group(FW) from day 2 to day 6, and mRNA abundance of AR increased in brackish water(BW) group from day 4 to day 8. These findings revealed that these three steroid synthesis genes are import for testicular development, hormone and salinity treatment, and provided also an insight into the mechanism of reproductive endocrine of L. maculatus.展开更多
基金Supported by Special Project of Public Welfare Industry(Agriculture)Science Research,Ministry of Agriculture,China(201303056)Zhejiang Standardization Research Project,China(2010-10)
文摘In order to evaluate the regulating effect of ＂ aquatic environment protection oriented fishery＂ on aquatic ecosystem,the water quality,plankton community structure,biomass,diversity index,eutrophication index and ecosystem maturity evaluated with Ecopath model were compared from 2010 to 2012 in Qiaodun Reservoir of Zhejiang Province. It was indicated that the water quality had been improved obviously. The water transparency maximally increased by 130%,while TP,TN and CODCrwere reduced. The density and biomass of the plankton were decreased,so was the ratio of Cynobacteria in phytoplankton community. The Shannon-Weaver index was increased; the trophic level was decreased; the ecosystem maturity was improved. By all accounts,the ＂ aquatic environment protection oriented fishery＂ had positive effects on maintaining the balance of reservoir ecosystem and ensuring the safety of drinking water.
文摘为了研究引起水稻叶片卷曲的分子机理,鉴定出新的水稻卷叶基因.用60Co-γ射线辐射诱变籼稻品种镇恢084,获得一份卷叶矮化突变体材料,命名为rld(rolling leaf and dwarf).通过形态学分析水稻表型,石蜡切片观察叶片细胞组织形态,图位克隆和测序技术进行精细定位和确定目的基因,生物信息学分析蛋白序列结构.结果显示:rld突变体叶片极度内卷,株高降低,穗长变短,结实率降低;rld突变体叶片维管束间的下表皮叶肉细胞面积增大;rld基因精细定位在标记Indel2和Indel5间的32.3kb的物理区间,测序发现rld是调控卷叶基因RL9的一个新等位基因,由于外显子上精氨酸缺失引起rld基因编码的蛋白空间结构发生改变.推测精氨酸在RL9蛋白的正常功能行使过程中是必要的,对维持水稻叶片表型具有至关重要的作用.
基金supported by the Chinese Agriculture Research System (No. CARS-47)Shandong Provincial Natural Science Foundation (No. ZR2016CQ21)the Key Laboratory of Mariculture (Ocean University of China), Ministry of Education (No. 2018008)
文摘In this study, three cDNA sequences corresponding to cytochrome P450 C17(CYP17 Ⅰ), 3β-hydroxysteroid dehydrogenase(3β-HSD) and androgen receptor(AR) were isolated from spotted sea bass(Lateolabrax maculatus). The mRNA abundances of CYP17 Ⅰ and 3β-HSD increased from stage Ⅱ to stage V with a significant increase at stage Ⅴ, and the highest abundance of AR mRNA was detected at stage Ⅲ in testicular development cycle. CYP17 I, 3β-HSD and AR transcripts were obviously abundant in steroidogenesis tissues such as testis, brain, head kidney among others. Strong and positive signals were observed mainly in interstitial cell regions of L. maculatus testis as were measured with in situ hybridization method. Significant increases of CYP17 Ⅰ and3β-HSD transcripts were detected after 12-48 h hCG(human chorionic gonadotropin) and GnRHa(gonadotropin-releasing hormone analogue) treatments. However, an opposite relationship was found for AR in testis at the same time. In addition, decreasing trends of CYP17 Ⅰ and 3β-HSD mRNA were observed in testis of L. maculatus in freshwater group(FW) from day 2 to day 6, and mRNA abundance of AR increased in brackish water(BW) group from day 4 to day 8. These findings revealed that these three steroid synthesis genes are import for testicular development, hormone and salinity treatment, and provided also an insight into the mechanism of reproductive endocrine of L. maculatus.
