Mangrove plants and nitrogen fixers

本研究旨在阐明红树植物根际土壤固氮的空间动态。我们观察到红树根区土壤固氮活性(氮素活性)显著高于非根区。随着植物生长阶段的推进，这一趋势逐渐明显。此外，我们还发现红树根区的固氮反应活化能显著高于非根区。这些结果解释了红树植物在其根部周围聚集了固氮剂，参与红树根部固氮的酶与没有根区的不同。

The aim of this study was to clarify spatial dynamics of soil nitrogen fixation around mangrove plant roots. We observed that soil nitrogen fixing activity (nitrogenaze activity) was significantly higher in mangrove root zone compared with that in no root zone. This tendency was getting clear in accordance with progress of plant growth stage. Furthermore, we found that activation energy of nitrogen fixing reaction was significantly higher in mangrove root zone than in no root zone. These results lead to interpretations that mangrove plants gather nitrogen fixers around their roots and the enzymes participating in nitrogen fixation around mangrove roots are different from those in no root zone.