PDF(Pubmed)
Abstract：
Former mine sites can provide habitat for many rare specialised bryophyte species that have adapted to metal-rich soil conditions that are toxic to most other plant species. Some of the bryophyte species found in this habitat are facultative metallophytes, and others are regarded as strict metallophytes, the so-called \'copper mosses\'. It is a general assumption in the literature that Cephaloziella nicholsonii and C. massalongoi, both categorised as Endangered in the IUCN Red List for Europe, are also strict metallophytes and obligate copper bryophytes. This in vitro experiment investigated the growth and gemma production of these two species from different sites in Ireland and Britain on treatment plates of 0 ppm, 3 ppm, 6 ppm, 12 ppm, 24 ppm, 48 ppm and 96 ppm copper. Results show that elevated copper is not an obligate requirement for optimum growth. Differences in response to the copper treatment levels among populations evident within both species could possibly be due to ecotypic variation. A case is also made for the taxonomic revision of the Cephaloziella genus. Implications for the species\' conservation are discussed.
摘要：
以前的矿区可以为许多稀有的专门苔藓植物物种提供栖息地，这些物种已经适应了对大多数其他植物物种有毒的富含金属的土壤条件。在该栖息地中发现的一些苔藓植物物种是兼性金属植物，和其他人被认为是严格的金属植物，所谓的“铜苔藓”。文献中的一般假设是头孢洛齐氏菌和马斯龙氏杆菌，两者都被列为IUCN欧洲红色名录中的濒危物种，也是严格的金属植物和专性铜苔藓植物。这项体外实验在0ppm的处理板上研究了来自爱尔兰和英国不同地点的这两个物种的生长和宝石生产，3ppm,6ppm,12ppm,24ppm,48ppm和96ppm铜。结果表明，铜的升高不是最佳生长的强制性要求。两种物种中明显的种群对铜处理水平的反应差异可能是由于生态型变异。还提出了对头孢洛齐菌属进行分类学修订的案例。讨论了对物种保护的影响。
