Metal tolerances and cotolerances in the moss Funaria hygrometrica
Metal tolerances and cotolerances in the moss Funaria hygrometrica
复制标题
苔藓 Funaria hygrometrica 中的金属耐受性和互耐受性
作者：
A. J. Shaw
从金属污染的尾矿、金属冶炼厂附近的污染土壤、城市地区和未受污染的农村场地收集的8个苔藓种群中，测量了铜、锌、镍和镉的耐受性。在含10 μg g−1铜的培养基上，从铜污染最严重的4个土壤中采集的种群的原丝体生长仅被抑制了10-30%，而来自其他地点的种群被抑制了80%以上。人群对锌、镉和镍的耐受性差异与这些金属对环境的污染没有明显的关系。不同种群在金属处理(铜除外)上的生长差异与生长速度的普遍差异有关，而不是与金属耐受性本身有关。不同种群在对照营养基质上形成茎的倾向差异高达400%，茎的形成与原丝体生长呈负相关，这表明配子体发育的这两个阶段之间存在权衡。两个..。
Tolerance of copper, zinc, nickel, and cadmium was measured in eight populations of the moss Funaria hygrometrica collected from metal-contaminated mine tailings, contaminated soils near metal smelters, urban areas, and an uncontaminated rural site. Protonemal growth in populations collected from the four most copper-contaminated soils was inhibited by only 10–30% on media with 10 μg g−1 copper, whereas populations from other sites were inhibited by over 80%. Population differences in tolerance of zinc, cadmium, and nickel were not clearly related to environmental contamination by these metals. Variation among populations in growth on the metal treatments (except copper) was related to generalized differences in growth rates rather than to metal tolerance per se. Populations differed by up to 400% in the propensity to form stems on control nutrient medium, and stem formation was negatively correlated with protonemal growth, suggesting trade-offs between these two stages of gametophyte development. The two...