CDPKs(calcium-dependent protein kinases,CDPKs)在植物适应非生物胁迫过程中发挥了重要作用,CDPK家族成员众多,在植物种间分布广泛,并且定位于不同的细胞器中。CDPKs是植物细胞钙信号转导的重要感受器,通过作用于多种多样的互作底物,参与植物对干旱胁迫、盐胁迫和低温胁迫的适应。在分子水平上,CDPKs通过磷酸化调节不同的底物蛋白的活性,进而实现基因表达调控、离子平衡调控和活性氧平衡调控,从而发挥各自的生物学功能。本文综述了CDPKs在植物逆境信号网络中的功能,并对将来的研究方向进行论述。
[Objective] This study aimed to investigate the artificial vegetations on soil physicochemical properties of sandy land. [Method] The soil physicochemical proper- ties in five representative lands respectively covered by Artemisia ordosica, Salix cheilophila, Hedysarum scoparium, Populus simonii and Amorpha fruticosa, all of which were planted artificially at the same year were measured in the present study, using a bare soil as the control. [Result] Artificial vegetation improved the soil physicochemical properties by different extents in the lands covered by different plants. The soil physicochemical properties such as bulk density under A. Fruticosa and H. Scoparium were improved greatly. The frequency distribution of soil particle size under artificial vegetations exhibited a bimodal curve. The average soil particle size under A. fruticosa was the smallest, and the soil was very poorly sorted. The soil nutrients in the sandy land were not significantly improved by artificial vegeta- tion. [Conclusion] Artificial vegetation has a certain impact on soil properties in sandy land, as it greatly improves the soil physical properties but not the chemical properties.
