کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4528371 | 1324303 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inhibition of Chara vulgaris oospore germination by sulfidic sediments
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Inhibition of Chara vulgaris oospore germination by sulfidic sediments Inhibition of Chara vulgaris oospore germination by sulfidic sediments](/preview/png/4528371.png)
چکیده انگلیسی
The germinability of Chara vulgaris oospores collected from the sediments of four Ontario lakes varies considerably, ranging in germination percentage from 7% to 54%. Chemical analysis of the interstitial water of the sediments indicated that oospores with low germination occurred in lakes which have high acid volatile sulfides (H2S, FeS, HSâ) and high soluble Fe2+. The inhibitory effects of sediment on oospore germination were demonstrated by transplant experiments, and suggested that sulfide was the toxic agent. Exposure of high-germinating sedimentary oospores to free sulfide concentrations greater than 2.0Â mM caused a greater than 30% reduction in oospore germination. The presence of sulfide in sediments was shown to result from sulfate reduction by bacteria in sediment pore water of those lakes where oospore viability was lowest. Differences in oospore germination percentage appear, therefore, to be due to the toxicity of H2S produced in the sediment, either by a direct effect on the oospore, or on the parent plants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Botany - Volume 91, Issue 4, November 2009, Pages 273-278
Journal: Aquatic Botany - Volume 91, Issue 4, November 2009, Pages 273-278
نویسندگان
Joana Sederias, Brian Colman,