کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11025992 1666443 2018 36 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plant roots alter microbial functional genes supporting root litter decomposition
ترجمه فارسی عنوان
ریشه گیاهان، ژنهای عملکردی میکروبی را از تجزیه بستر ریشه جلوگیری می کنند
کلمات کلیدی
عملکرد میکروبی / تجزیه کربن ارگانیک / استفاده از بستر ترجیحی / اثر پارتیشن بندی ریزوسفر / استحکام میکربی خاک / آب خاک،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش خاک شناسی
چکیده انگلیسی
Decomposition of soil organic carbon is central to the global carbon cycle and profoundly affected by plant roots. While root “priming” of decomposition has been extensively investigated, it is not known how plants alter the molecular ecology of soil microbial decomposers. We disentangled the effects of Avena fatua, a common annual grass, on 13C-labeled root litter decomposition and quantified multiple genetic characteristics of soil bacterial and fungal communities. In our study, plants consistently suppressed rates of root litter decomposition. Microbes from planted soils had relatively more genes coding for low molecular weight compound degradation enzymes, while those from unplanted had more macromolecule degradation genes. Higher abundances of “water stress” genes in planted soils suggested that microbes experienced plant-induced water stress. We developed a conceptual model based on Mantel analyses of our extensive data set. This model indicates that plant root effects on the multiple soil environmental and microbial mechanisms involved in root litter decomposition act through changing the functional gene profiles of microbial decomposers living near plant roots.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 127, December 2018, Pages 90-99
نویسندگان
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