NITROGEN ISOTOPE DISTRIBUTION AS A PRESUMPTIVE INDICATOR OF NITROGEN-FIXATION
NITROGEN ISOTOPE DISTRIBUTION AS A PRESUMPTIVE INDICATOR OF NITROGEN-FIXATION
复制标题
DOI：
10.1086/337037
复制
发表时间：
1979-01-01
影响因子：
--
通讯作者：
VIRGINIA, RA
中科院分区：
文献类型：
--
作者：
DELWICHE, CC;ZINKE, PJ;VIRGINIA, RA
固氮生物体通常较低的 15 N/ 14 N 比率提供了筛选混合群体中固氮个体的机会。对相关加利福尼亚本地物种以及发现它们的土壤进行的采样显示 15 N/ 14 N 比率存在差异，表明某些物种具有固氮能力。并非所有可疑的修复者都耗尽了 15 N，并且两种腐生菌具有显着的 15 N 富集。该方法显示出一些前景，但在该方法得到普遍应用之前，需要进一步了解分馏过程。
The generally lower15N/14N ratio of nitrogen-fixing organisms provides an opportunity to screen mixed populations for individuals fixing nitrogen. Samplings of associated California native species, along with the soil on which they were found, show differences in15N/14N ratios suggesting a capability among some for the fixation of nitrogen. Not all suspected fixers were depleted in15N, and two saprophytes had significant15N enrichment. The method shows some promise, but further understanding of fractionation processes is needed before the method can be generally applied.