Soil type overrides plant effect on genetic and enzymatic N2O production potential in arable soils
Soil type overrides plant effect on genetic and enzymatic N2O production potential in arable soils
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DOI：
10.1016/j.soilbio.2016.06.006
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发表时间：
2016-09-01
影响因子：
9.7
通讯作者：
Hallin, Sara
中科院分区：
文献类型：
--
作者：
Graf, Daniel R. H.;Zhao, Ming;Hallin, Sara
一氧化二氮（N2O）是一种有效的温室气体，主要是由于农业土壤中不完整的硝化产生的。根际是反硝化的热点，这项研究旨在辨别土壤类型和作物对遗传N2O产生的相对重要性，以及土壤和根部相关群落中与非硝化活性相关的潜在。基于用大麦或向日葵种植的两种农业土壤的锅实验，我们表明土壤类型的作物对遗传和酶促潜力的影响覆盖了作物的影响。我们还展示了一氧化二氮还原酶基因Noszi和Noszii之间的利基分化，而在土壤中与根相关的社区和进化枝II中的进化枝I主导。 （c）2016 Elsevier Ltd.保留所有权利。
Nitrous oxide (N2O) is a potent greenhouse gas mainly produced by incomplete denitrification in agricultural soils. The rhizosphere is a hot spot for denitrification and this study aimed to discern the relative importance of soil type and crop on the genetic N2O production and reduction potential in soil and root associated communities in relation to denitrification activity. Based on a pot experiment with two agricultural soils planted with barley or sunflower, we showed that the effect of soil type overrode that of crop on both genetic and enzymatic potential. We also demonstrate niche differentiation between the nitrous oxide reductase genes nosZI and nosZII, with clade I dominating in the root-associated community and clade II in the soil. (C) 2016 Elsevier Ltd. All rights reserved.