运球手递手掩护(Dribble Hand Off,以下简称DHO)战术已成为三人篮球比赛中的主要战术。本研究从发动特征、配合特征及终结特征3个维度构建分析框架,并以此对东京2020奥运会女子三人篮球4强赛中DHO战术的运用特征进行分析,结果表明:(1)DH...运球手递手掩护(Dribble Hand Off,以下简称DHO)战术已成为三人篮球比赛中的主要战术。本研究从发动特征、配合特征及终结特征3个维度构建分析框架,并以此对东京2020奥运会女子三人篮球4强赛中DHO战术的运用特征进行分析,结果表明:(1)DHO战术已成为各队主要战术,具备突然性强、延续性好、欺骗性强及得分效率高等优势;(2)DHO战术在比赛时间的各个阶段分布均匀,较多在进攻时间0-4秒时于侧高位和内高位发动,切入人直接上篮、切入人2分投篮、连续掩护、传切成为主要的得分方式,战术使用率、战术成功率、投篮命中率均较高;(3)针对DHO战术,各队采取了延误和影子防守等策略,DHO战术则借助连续掩护、加快配合速度及两名外线队员直接配合等进行应对。展开更多
In the present paper, we identified and cloned OsDHODH1 encoding a putative cytosolic dihydroorotate dehydrogenase （DHODH） in rice. Expression analysis indicated that OsDHODH1 is upregulated by salt, drought and exo...In the present paper, we identified and cloned OsDHODH1 encoding a putative cytosolic dihydroorotate dehydrogenase （DHODH） in rice. Expression analysis indicated that OsDHODH1 is upregulated by salt, drought and exogenous abscisic acid （ABA）, but not by cold. By prokaryotic expression, we determined the enzymatic activity of OsDHODH1 and found that overproduction of OsDHODH1 significantly improved the tolerance of Escherichia coil cells to salt and osmotic stresses. Overexpression of the OsDHODH1 gene in rice increased the DHODH activity and enhanced plant tolerance to salt and drought stresses as compared with wild type and OsDHODHl-antisense transgenic plants. Our findings reveal, for the first time, that cytosolic dihydroorotate dehydrogenase is involved in plant stress response and that OsDHODH1 could be used in engineering crop plants with enhanced tolerance to salt and drought.展开更多
文摘运球手递手掩护(Dribble Hand Off,以下简称DHO)战术已成为三人篮球比赛中的主要战术。本研究从发动特征、配合特征及终结特征3个维度构建分析框架,并以此对东京2020奥运会女子三人篮球4强赛中DHO战术的运用特征进行分析,结果表明:(1)DHO战术已成为各队主要战术,具备突然性强、延续性好、欺骗性强及得分效率高等优势;(2)DHO战术在比赛时间的各个阶段分布均匀,较多在进攻时间0-4秒时于侧高位和内高位发动,切入人直接上篮、切入人2分投篮、连续掩护、传切成为主要的得分方式,战术使用率、战术成功率、投篮命中率均较高;(3)针对DHO战术,各队采取了延误和影子防守等策略,DHO战术则借助连续掩护、加快配合速度及两名外线队员直接配合等进行应对。
基金Supported by the National Natural Science Foundation of China (30600350)the Program for New Century Excellent Talents in University, the 111 Project(B08025)the Changjiang Scholars and Innovative Research Team in University (PCSIRT)
文摘In the present paper, we identified and cloned OsDHODH1 encoding a putative cytosolic dihydroorotate dehydrogenase （DHODH） in rice. Expression analysis indicated that OsDHODH1 is upregulated by salt, drought and exogenous abscisic acid （ABA）, but not by cold. By prokaryotic expression, we determined the enzymatic activity of OsDHODH1 and found that overproduction of OsDHODH1 significantly improved the tolerance of Escherichia coil cells to salt and osmotic stresses. Overexpression of the OsDHODH1 gene in rice increased the DHODH activity and enhanced plant tolerance to salt and drought stresses as compared with wild type and OsDHODHl-antisense transgenic plants. Our findings reveal, for the first time, that cytosolic dihydroorotate dehydrogenase is involved in plant stress response and that OsDHODH1 could be used in engineering crop plants with enhanced tolerance to salt and drought.
