Methods for the localization of plant calmodulin by immuno-gold and immuno-peroxidase electron microscopy have been developed. In both corn root-cap cells and meristematic cells, calmodulin was found to be localized i...Methods for the localization of plant calmodulin by immuno-gold and immuno-peroxidase electron microscopy have been developed. In both corn root-cap cells and meristematic cells, calmodulin was found to be localized in the nucleus, cytoplasm, mitochondria as well as in the cell wall. In the meristematic cells, calmodulin was distinctly localized on the plasma membrane, cytoplasmic face of rough endoplasmic reticulum and polyribosomes. Characteristically, calmodulin was present in the amyloplasts of root-cap cells. The widespread distribution of calmodulin may reflect its pleiotropic functions in plant cellular activities.展开更多
间作是世界古老的农田种植模式,合理的间作可增加叶片的光合效率,作物间竞争与合作,促进植株生长发育。本研究设置3种种植模式:玉米‖棉花、单作玉米和单作棉花,分别对植株的农艺性状、叶片叶绿素相对含量、产量构成因素以及根系分布特...间作是世界古老的农田种植模式,合理的间作可增加叶片的光合效率,作物间竞争与合作,促进植株生长发育。本研究设置3种种植模式:玉米‖棉花、单作玉米和单作棉花,分别对植株的农艺性状、叶片叶绿素相对含量、产量构成因素以及根系分布特征对作物生长发育与产量形成等方面进行了探讨和分析。最后结果说明,玉米间作棉花种植模式可以使玉米株高提高5.41%~46.29%,SPAD值变化幅度为-0.5%~26%。0~20 cm、20~40 cm RLD值分别增加51.37%~68.30%、40.39%~88.14%;间作使棉花株高降低9.51%~19.88%,SPAD值降低了1.71%~10.17%,0~20 cm、20~40 cm RLD值分别增加29.11%~40.89%、49.08%~96.32%。玉米间作棉花的土地当量比LER=1.2802>1,增产率为28.02%。并得到结论:玉米间作棉花种植模式下能有效提升大田的作物产量,但具体主要影响需进一步深入研究。展开更多
为研究秸秆饲料收获机工作时玉米根土复合体受力变化情况,利用离散元法建立了整根玉米根系颗粒粘结模型。根据玉米根系物理特性,选取Hertz-Mindlin with Bonding颗粒接触模型;为准确获取离散元仿真参数,采用根系剪切试验与离散元仿真相...为研究秸秆饲料收获机工作时玉米根土复合体受力变化情况,利用离散元法建立了整根玉米根系颗粒粘结模型。根据玉米根系物理特性,选取Hertz-Mindlin with Bonding颗粒接触模型;为准确获取离散元仿真参数,采用根系剪切试验与离散元仿真相结合的方法,对离散元参数进行标定。以根系峰值剪切力为响应值,采用Design Expert软件依次设计Plackett-Burman试验、最陡爬坡试验与Box-Behnken试验,得到最优仿真参数,即颗粒间剪切模量为6.6MPa、粘结刚度为1.139×10^(6)N/m^(3)、极限应力为1.1885MPa。结果表明:仿真值与实际值相对误差为2.12%,仿真标定结果真实可信。最终,根据根系实际尺寸,采用颗粒快速填充方法建立整根玉米根系模型,旨在为后续秸秆饲料收获机械离散元仿真提供参考依据。展开更多
文摘Methods for the localization of plant calmodulin by immuno-gold and immuno-peroxidase electron microscopy have been developed. In both corn root-cap cells and meristematic cells, calmodulin was found to be localized in the nucleus, cytoplasm, mitochondria as well as in the cell wall. In the meristematic cells, calmodulin was distinctly localized on the plasma membrane, cytoplasmic face of rough endoplasmic reticulum and polyribosomes. Characteristically, calmodulin was present in the amyloplasts of root-cap cells. The widespread distribution of calmodulin may reflect its pleiotropic functions in plant cellular activities.
文摘间作是世界古老的农田种植模式,合理的间作可增加叶片的光合效率,作物间竞争与合作,促进植株生长发育。本研究设置3种种植模式:玉米‖棉花、单作玉米和单作棉花,分别对植株的农艺性状、叶片叶绿素相对含量、产量构成因素以及根系分布特征对作物生长发育与产量形成等方面进行了探讨和分析。最后结果说明,玉米间作棉花种植模式可以使玉米株高提高5.41%~46.29%,SPAD值变化幅度为-0.5%~26%。0~20 cm、20~40 cm RLD值分别增加51.37%~68.30%、40.39%~88.14%;间作使棉花株高降低9.51%~19.88%,SPAD值降低了1.71%~10.17%,0~20 cm、20~40 cm RLD值分别增加29.11%~40.89%、49.08%~96.32%。玉米间作棉花的土地当量比LER=1.2802>1,增产率为28.02%。并得到结论:玉米间作棉花种植模式下能有效提升大田的作物产量,但具体主要影响需进一步深入研究。
文摘为研究秸秆饲料收获机工作时玉米根土复合体受力变化情况,利用离散元法建立了整根玉米根系颗粒粘结模型。根据玉米根系物理特性,选取Hertz-Mindlin with Bonding颗粒接触模型;为准确获取离散元仿真参数,采用根系剪切试验与离散元仿真相结合的方法,对离散元参数进行标定。以根系峰值剪切力为响应值,采用Design Expert软件依次设计Plackett-Burman试验、最陡爬坡试验与Box-Behnken试验,得到最优仿真参数,即颗粒间剪切模量为6.6MPa、粘结刚度为1.139×10^(6)N/m^(3)、极限应力为1.1885MPa。结果表明:仿真值与实际值相对误差为2.12%,仿真标定结果真实可信。最终,根据根系实际尺寸,采用颗粒快速填充方法建立整根玉米根系模型,旨在为后续秸秆饲料收获机械离散元仿真提供参考依据。
