Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Apartado 1095, 41080 Sevilla, Spain.
Mar Pollut Bull. 2012 Apr;64(4):721-8. doi: 10.1016/j.marpolbul.2012.02.002. Epub 2012 Feb 25.
The present study evaluated the tolerance and accumulation potential in the salt-marsh shrub Halimione portulacoides under moderate and high external Cu levels. A greenhouse experiment was conducted in order to investigate the effects of a range of external Cu concentrations (0 to 60 mmol l(-1)) on growth and photosynthetic performance by measuring gas exchange, chlorophyll fluorescence parameters and photosynthetic pigments. We also determined total copper, nitrogen, phosphorus and sulfur concentrations in the plant tissues. H. portulacoides survived with external Cu concentrations of up to 35 mmol Cu l(-1), although the excess of metal resulted in a biomass reduction of 48%. The effects of Cu on growth were linked to a drastic reduction in net photosynthesis. However, H. portulacoides tolerated Cu levels of up to 15 mmol Cu l(-1) without suffering adverse physiological effects. Our results indicate that this species could play an important role in the restoration of Cu-contaminated soils.
本研究评估了盐沼灌木海蓬子在中等和高外部铜水平下的耐受性和积累潜力。为了研究一系列外部铜浓度（0 至 60mmol l（-1））对生长和光合性能的影响，通过测量气体交换、叶绿素荧光参数和光合色素进行了温室实验。我们还测定了植物组织中的总铜、氮、磷和硫浓度。海蓬子在高达 35mmol Cu l（-1）的外部 Cu 浓度下存活下来，尽管过量的金属导致生物量减少了 48%。Cu 对生长的影响与净光合作用的急剧下降有关。然而，海蓬子在不遭受不良生理影响的情况下可以耐受高达 15mmol Cu l（-1）的 Cu 水平。我们的结果表明，该物种在受 Cu 污染土壤的修复中可能发挥重要作用。
