Growth and phosphate uptake kinetics(经典3篇)
Growth and Phosphate Uptake Kinetics 篇一
在植物生长和磷酸盐吸收动力学中存在着密切的关系。磷酸盐是植物生长和发育过程中必需的营养物质之一,参与了许多重要的生化反应,如ATP合成、DNA和RNA合成以及酶催化反应。因此,磷酸盐的有效吸收对于植物的生长和发育至关重要。
磷酸盐的吸收是通过植物根系中的吸收系统进行的。这个过程包括两个阶段:吸附和内部化。吸附是指磷酸盐与根系表面之间的物理和化学相互作用。在这个过程中,根系表面的负电荷吸引并吸附磷酸盐分子。吸附后,磷酸盐分子进入根系内部,通过内部化进入植物体内。
磷酸盐的吸附和内部化过程受到多种因素的影响。其中最重要的影响因素是磷酸盐浓度和根系表面的负电荷。磷酸盐浓度越高,吸附和内部化速率越快。根系表面的负电荷也会影响磷酸盐的吸附和内部化速率。负电荷越多,吸附和内部化速率越快。
另外,磷酸盐的吸附和内部化过程还受到其他环境因素的影响,如土壤pH值、温度和水分等。土壤pH值的变化会影响根系表面的负电荷数量,从而影响磷酸盐的吸附和内部化速率。温度和水分对于植物的生长和发育也有重要影响,因此对磷酸盐的吸附和内部化速率也会产生影响。
了解植物的生长和磷酸盐吸收动力学对于优化植物生产和土壤肥力管理具有重要意义。通过研究磷酸盐的吸附和内部化过程,我们可以了解到植物对磷酸盐的需求量和吸收速率,从而合理施用肥料和优化土壤肥力管理。此外,研究植物对磷酸盐的吸附和内部化过程还可以为改良土壤和增强植物的适应性提供依据。
综上所述,植物生长和磷酸盐吸收动力学之间存在着密切的关系。磷酸盐的吸附和内部化过程受到多种因素的影响,如磷酸盐浓度、根系表面的负电荷以及土壤pH值、温度和水分等环境因素。了解植物的生长和磷酸盐吸收动力学对于优化植物生产和土壤肥力管理具有重要意义。通过研究磷酸盐的吸附和内部化过程,我们可以为合理施用肥料和优化土壤肥力管理提供依据,同时也可以改良土壤和增强植物的适应性。
Growth and phosphate uptake kinetics 篇三
Growth and phosphate uptake kinetics of Microcystis aeruginosa under various environmental conditions
Abstract: Growth and uptake of exogenous phosphate by Microcystis aeruginosa in batch culture under differenttemperature, photoperiod, and turbulence were studied by the method of phosphate isotope tracer. Relatively hightemperature, long photoperiod and strong turbulence increased the cell density of M. aeruginosa in these batchcultures. The initial rapid uptake of phosphate by M. aeruginosa was independent of the temperature, photoperiod,and turbulence. Similarly, maximum exogenous phosphate uptake was not related to these environmental factors.However, elevated temperature and turbulence shortened the time, required to obtain maximum P accumulation.The growth of M. aeruginosa could alleviate the phosphorous leakage. Total amounts of exogenous phosphateuptake to M. aeruginosa and the phosphorus leakage of M. aeruginosa were significantly influenced by the growthstate of M. aeruginosa closely correlated with the environmental factors. The maximum volume of exogenousphosphate uptake to M. aeruginosa was 46% of added exogenous phosphate in water with 16 hours of photoperiod.Thus, total amounts of exogenous phosphate uptake to M. aeruginosa were more strongly affected by thephotoperiod length than temperature and turbulence. 作 者: SHI Xiao-li YANG Liu-yan WANG Feng-ping XIAO Lin JIANG Li-juan Kong Zhi-ming GAO Guang QIN Bo-qiang 作者单位: SHI Xiao-li,YANG Liu-yan,XIAO Lin,JIANG Li-juan,Kong Zhi-ming(State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China)WANG Feng-ping(The Modem Analysis Center, Nanjing University, Nanjing 210093, China)
GAO Guang,QIN Bo-qiang(Nanjing Institute of Geography and Limnology of CAS, Nanjing, 210008,China)
期 刊:环境科学学报(英文版) ISTICSCI Journal: JOURNAL OF ENVIRONMENTAL SCIENCES 年,卷(期): 2004,16(2) 分类号: X172 X52 Keywords: Microcystis aeruginosa exogenous phosphate photoperiod temperature turbulence uptake