Cataldo D A, Wildung R E
Sci Total Environ. 1983 Jun;28:159-68. doi: 10.1016/s0048-9697(83)80015-1.
Metabolic and physiological processes play important roles in regulating the transfer and behavior of trace elements in the soil/plant/animal system. The behaviors of Ni, Cd, Cr, T1, Np, Pu and Tc are used to illustrate important aspects of these processes. Microbial metabolism has both indirect and direct effects on trace element solubility in soils. Once non-nutrient trace elements are solubilized, the ability of plant roots to actively accumulate them is dependent on chemical activity of the element in soil solution, the presence of competing ions and the redox potential and absorption capacity of the root. After absorption in the plant, trace elements are translocated, metabolized and stored; fate and behavior varies with the properties of the element, but is generally analogous to nutrient elements. These processes can dramatically affect the availability of individual elements to animals consuming plants.
代谢和生理过程在调节土壤/植物/动物系统中微量元素的迁移和行为方面发挥着重要作用。镍、镉、铬、铊、镎、钚和锝的行为被用于阐释这些过程的重要方面。微生物代谢对土壤中微量元素的溶解度既有间接影响也有直接影响。一旦非营养性微量元素被溶解，植物根系主动积累它们的能力取决于该元素在土壤溶液中的化学活性、竞争离子的存在以及根系的氧化还原电位和吸收能力。在植物吸收后，微量元素会发生转运、代谢和储存；其归宿和行为因元素特性而异，但通常与营养元素类似。这些过程会极大地影响食用植物的动物对单个元素的可利用性。
