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首页> 外文期刊>Journal of Theoretical Biology >Regulation of phosphate uptake kinetics in the bloom-forming dinoflagellates prorocentrum donghaiense with emphasis on two-stage dynamic process
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Regulation of phosphate uptake kinetics in the bloom-forming dinoflagellates prorocentrum donghaiense with emphasis on two-stage dynamic process

机译：浅析培养的培养型丁食物肾上腺素普罗兰肾上腺素的调节，重点强调两阶段动态过程

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Phosphorus is an essential element for the growth and reproduction of algae. In recent years, the frequent outbreaks of algal blooms caused by eutrophication have drawn much attention to the influence of phosphate (P) uptake on the growth of algal cells. The previous study only considered the effect of total P pools on the P uptake process of algal cells and considered the process as one stage, which is insufficient. P uptake by algae is actually a two-stage kinetic process because in many algae species, surface-adsorbed P pools account for a large proportion of total P pools. In this paper, we fit one-stage and two-stage models of P uptake by algae to our experimental data on short-term uptake kinetics of algae Prorocentrum donghaiense under P-deplete and P-replete conditions at 24 degrees C. According to the experimental results, P. donghaiense possesses different P uptake characteristics under different P concentrations. P. donghaiense grows faster and exponentially for longer periods of time under P-replete condition. Ranges of change of Q(c) (cell quota of intracellular P) and S-p (cell quota of surface-adsorbed P) during the culture time are obviously larger under P-replete condition than those under P-deplete condition. The value of K-p (represents the impact of P-starvation on P uptake rate) in one-stage model under P-deplete condition is smaller than that under P-replete condition, which is opposite to results of two-stage model and does not meet the actual biological significance of Kp. The two-stage model gives more reasonable and realistic explanations to the process of P uptake by algae no matter from the perspective of intuitive fitting effect, biological significance of parameters, statistical test results or essential dynamic process. These results, combined with long-term lab and field data in ocean, could be used to effectively predict algal blooms. (C) 2018 Elsevier Ltd. All rights reserved.
机译：磷是藻类生长和繁殖的基本要素。近年来，由富营养化引起的藻类绽放的频繁爆发已经引起了磷酸盐（P）吸收对藻类细胞生长的影响。以前的研究仅考虑了总P池对藻类细胞的P进入过程的影响，并认为该过程作为一个阶段，这是不充分的。 P通过藻类的PFake实际上是一种两级动力学过程，因为在许多藻类种类中，表面吸附的P池占总P池的大量比例。在本文中，我们将藻类对P-Feplete和P-Replete条件下的P-Feake和P-Replete条件下的短期摄取动力学的实验数据适用于我们的实验数据。实验结果，P. Dongaiense在不同的P浓度下具有不同的p吸收特性。 P. Dongaheense在P-Replete条件下的时间更长的时间越来越快地增长。在培养时间内的Q（c）（细胞内P的细胞配额）和S-P（表面吸附P的细胞配额）的变化范围在P折叠条件下明显较大。在P-Feplete条件下的单阶段模型中，KP的值（代表p饥饿对p饥饿率的影响）小于P-replete条件下的一个阶段模型，这与两级模型的结果相反，并且没有满足KP的实际生物学意义。无论从直观的拟合效果，参数的生物学意义，统计测试结果还是必要的动态过程的角度，两阶段模型对藻类的过程提供了更合理和现实的解释。这些结果与海洋中的长期实验室和现场数据相结合，可用于有效地预测藻类盛开。 （c）2018年elestvier有限公司保留所有权利。

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