کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4427111 | 1309146 | 2008 | 7 صفحه PDF | دانلود رایگان |
The effects of different concentrations (10−5, 5 × 10−5 and 10−4 M) of copper bromide on spore germination, growth and ultrastructure were investigated in Polypodium cambricum L. gametophytes. The inhibitory effect of Cu was observed in spores cultured on medium supplemented with 10−4 M CuBr2: germination occurred about 40 days after sowing and was only 25%. Concentrations of 5 × 10−5 and 10−4 M CuBr2 induced changes in gametophyte development, possibly by re-orientation of growth. Gametophytes treated with 10−5 and 5 × 10−5 M CuBr2 took up and accumulated a large amount of copper and ultrastructural observations showed that cytoplasmic damage was limited to twisted swollen thylakoids. The ultrastructure of gametophytes treated with 10−4 M CuBr2 showed absence of a vacuolar compartment. The present observations suggest that P. cambricum gametophytes could be a suitable material for studying physiological and molecular alterations induced by excess copper.
Journal: Environmental Pollution - Volume 153, Issue 2, May 2008, Pages 369–375