کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2027215 | 1070097 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Uptake of 87Sr from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ectomycorrhizal (EM) fungi growing in symbiosis with tree seedlings have been found in laboratory experiments to stimulate weathering and the uptake of nutrients from silicate minerals. In the present study, we used the natural abundance of strontium isotopes to confirm that these fungi obtain strontium from biotite and microcline under field conditions. Minerals enriched in radiogenic 87Sr were introduced into fungal in-growth mesh bags and placed under a 5-10Â cm thick humus layer developed on boulders in a Norway spruce (Picea abies (L.) Karst) forest in south-western Sweden. EM root tips were sampled above the mesh bags and the 87Sr/86Sr ratio was used to calculate the fraction of Sr in the root tips that originated from the minerals. In the EM root tips sampled above the mesh bags containing the different minerals, 1.5% of the Sr originated from biotite and 6.4% from microcline. The amount of Sr was more than 300 times higher in the mesh bags containing microcline than in those containing biotite, indicating that proportionally more Sr was released from the biotite. This study demonstrates that EM fungi have the potential to take up measurable amounts of nutrients, such as Ca and K, from microcline and biotite in the field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 38, Issue 8, August 2006, Pages 2487-2490
Journal: Soil Biology and Biochemistry - Volume 38, Issue 8, August 2006, Pages 2487-2490
نویسندگان
HÃ¥kan Wallander, David Hagerberg, Göran Ã
berg,