کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4551515 1328305 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth and photosynthetic responses to copper stress of an invasive cordgrass, Spartina densiflora
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
پیش نمایش صفحه اول مقاله
Growth and photosynthetic responses to copper stress of an invasive cordgrass, Spartina densiflora
چکیده انگلیسی

Spartina densiflora Brongn. is found in coastal marshes of south-west Spain, growing in sediments with between 300 and 3000 mg Cu kg−1 total soil DW (450–4500 mg Cu kg−1 supposing that the soil porosity is 0.5). An experiment was designed to investigate the effect of copper from 0 to 5000 mg kg−1 (64 mmol l−1) on the photosynthetic apparatus and the growth of S. densiflora. We also determined total ash, copper, calcium, magnesium and phosphorous concentrations, as well as C/N ratio. S. densiflora survived to concentrations as high as 320 mg Cu kg−1 DW in leaves, although excess of Cu diminished water use efficiency and Ca-, Mg- and P-uptake. Also, quantum efficiency of PSII, net photosynthetic rate, stomatal conductance and pigment concentrations declined with increasing external Cu. Finally, the decline in the photosynthetic function resulted in a biomass reduction of between 50 and 80% (for 600 and 5000 mg Cu kg−1, respectively).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Environmental Research - Volume 66, Issue 4, October 2008, Pages 459–465
نویسندگان
, , , ,