Mangrove plants and nitrogen fixers

本研究的目的是阐明红树林植物根系周围土壤固氮的空间动态。结果表明，红树林根区土壤固氮活性（固氮活性）显著高于无根区。这种趋势随着植物生长阶段的进展而越来越明显。此外，我们还发现有根区的红树林固氮反应活化能显著高于无根区。这些结果表明，红树林植物根系周围聚集了固氮酶，且红树林根系周围参与固氮的酶与无根区不同。

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.