为揭示不同粳稻品种成熟胚的愈伤诱导特性,以17个优质高产水稻成熟胚为外植体,比较其愈伤组织在不同培养基中的出愈率,并对出愈率较高(宁9213)和较低(南粳41)的品种在不同培养基中的出愈率、愈伤组织状态、细胞的结构及其蛋白组分差异...为揭示不同粳稻品种成熟胚的愈伤诱导特性,以17个优质高产水稻成熟胚为外植体,比较其愈伤组织在不同培养基中的出愈率,并对出愈率较高(宁9213)和较低(南粳41)的品种在不同培养基中的出愈率、愈伤组织状态、细胞的结构及其蛋白组分差异进行分析。结果表明,供试品种在不同激素组合中愈伤诱导率高低顺序为:2,4-D+KT>2,4-D+6-BA>2,4-D+KT+6-BA。宁9213在2种培养基(2 mg·L-12,4-D+0.3 mg·L-16-BA和2 mg·L-12,4-D+0.3 mg·L-1KT)中愈伤的诱导率均显著高于南粳41,二者在添加KT的培养基中的诱导率高于添加6-BA的诱导率。仅添加了KT和6-BA 2种激素的培养基中愈伤组织超微结构差异不大,均表现为细胞间排列较紧凑,细胞质浓厚,具有大的细胞核和核仁,核膜完整,具有较多的线粒体和较少的质体。南粳41在添加了KT的培养基中愈伤细胞处于活跃状态,在添加了6-BA的培养基中细胞处于衰老状态。蛋白质组分分析显示,宁9213缺失了59 k D蛋白,而南粳41缺失了70 k D蛋白,但不同培养基诱导对两者愈伤组织的蛋白组分影响不大。因此,品种间成熟胚出愈率不同主要是由于不同基因型品种成熟胚对外源激素敏感程度存在差异,从而引起其愈伤组织细胞生理功能、衰老速度以及特异蛋白表达的差异。本研究结果将有助于揭示水稻成熟胚愈伤诱导的规律,并利于加快水稻基因改良的进程。展开更多
To investigate the relationship between nonlinear parameters and spontaneous combustion tendency of sulfide ores, nine different sulfide ore samples were taken from a pyrite mine in China, and induced spontaneous comb...To investigate the relationship between nonlinear parameters and spontaneous combustion tendency of sulfide ores, nine different sulfide ore samples were taken from a pyrite mine in China, and induced spontaneous combustion experiment was carried out in the laboratory. Different stages of the induced spontaneous combustion process were studied by integrating wavelet technology and nonlinear dynamics theory. The results show that ignition points of all the ore samples are above 330 ℃, indicating that sulfide ores of the pyrite mine are difficult to combust spontaneously under normal mining conditions. Spontaneous combustion process includes three stages： incubation stage, development stage and approaching stage. The average temperature rising rate of the three stages are 1.0 ~C/min, 2.0 ~C/min and 4.2 ~C/min, respectively. During the spontaneous combustion process, mean values of approximate entropy and correlation dimension increase at first, and then decrease in the following stage. The mean value of the maximum Lyapunov exponent increases with the passage of reaction time. In a whole, correlation among the three nonlinear parameters firstly weakens, then enhances, and the best correlation period is at approaching stage. As ignition point increases, the maximum Lyapunov exponent of approaching stage decreases. Therefore, combustible tendency of sulfide ores could be qualitatively evaluated based on the maximum Lyapunov exponent of this stage.展开更多
文摘为揭示不同粳稻品种成熟胚的愈伤诱导特性,以17个优质高产水稻成熟胚为外植体,比较其愈伤组织在不同培养基中的出愈率,并对出愈率较高(宁9213)和较低(南粳41)的品种在不同培养基中的出愈率、愈伤组织状态、细胞的结构及其蛋白组分差异进行分析。结果表明,供试品种在不同激素组合中愈伤诱导率高低顺序为:2,4-D+KT>2,4-D+6-BA>2,4-D+KT+6-BA。宁9213在2种培养基(2 mg·L-12,4-D+0.3 mg·L-16-BA和2 mg·L-12,4-D+0.3 mg·L-1KT)中愈伤的诱导率均显著高于南粳41,二者在添加KT的培养基中的诱导率高于添加6-BA的诱导率。仅添加了KT和6-BA 2种激素的培养基中愈伤组织超微结构差异不大,均表现为细胞间排列较紧凑,细胞质浓厚,具有大的细胞核和核仁,核膜完整,具有较多的线粒体和较少的质体。南粳41在添加了KT的培养基中愈伤细胞处于活跃状态,在添加了6-BA的培养基中细胞处于衰老状态。蛋白质组分分析显示,宁9213缺失了59 k D蛋白,而南粳41缺失了70 k D蛋白,但不同培养基诱导对两者愈伤组织的蛋白组分影响不大。因此,品种间成熟胚出愈率不同主要是由于不同基因型品种成熟胚对外源激素敏感程度存在差异,从而引起其愈伤组织细胞生理功能、衰老速度以及特异蛋白表达的差异。本研究结果将有助于揭示水稻成熟胚愈伤诱导的规律,并利于加快水稻基因改良的进程。
基金Projects(51304238,51534008)supported by the National Natural Science Foundation of ChinaProject(2015CX005)supported by Innovation Driven Plan of Central South University,China
文摘To investigate the relationship between nonlinear parameters and spontaneous combustion tendency of sulfide ores, nine different sulfide ore samples were taken from a pyrite mine in China, and induced spontaneous combustion experiment was carried out in the laboratory. Different stages of the induced spontaneous combustion process were studied by integrating wavelet technology and nonlinear dynamics theory. The results show that ignition points of all the ore samples are above 330 ℃, indicating that sulfide ores of the pyrite mine are difficult to combust spontaneously under normal mining conditions. Spontaneous combustion process includes three stages： incubation stage, development stage and approaching stage. The average temperature rising rate of the three stages are 1.0 ~C/min, 2.0 ~C/min and 4.2 ~C/min, respectively. During the spontaneous combustion process, mean values of approximate entropy and correlation dimension increase at first, and then decrease in the following stage. The mean value of the maximum Lyapunov exponent increases with the passage of reaction time. In a whole, correlation among the three nonlinear parameters firstly weakens, then enhances, and the best correlation period is at approaching stage. As ignition point increases, the maximum Lyapunov exponent of approaching stage decreases. Therefore, combustible tendency of sulfide ores could be qualitatively evaluated based on the maximum Lyapunov exponent of this stage.
