Abstract:
:Lotus pedunculatus L., Medicago sativa L., Macroptilium atropurpureum, Glycine max, and Trifolium repens L. were grown in a N-free medium and inoculated with one of ten Rhizobium strains. Dry matter, N content, and delta(15)N values were determined for various plant parts.Nodules, with the exception of those from lucerne, were enriched in (15)N relative to atmospheric N. Considerable variation was found in delta(15)N values of plant herbage (-4.5 to +0.8). The extent of isotopic discrimination was dependent on both the host plant and the infecting rhizobial strain. This further complicates, but does not invalidate, the use of small variations in the natural abundance of (15)N to estimate the contribution of symbiotically fixed N(2) to the N in legume herbage. Some other implications of the observed differences are also discussed.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Steele KW,Bonish PM,Daniel RM,O'hara GWdoi
10.1104/pp.72.4.1001subject
Has Abstractpub_date
1983-08-01 00:00:00pages
1001-4issue
4eissn
0032-0889issn
1532-2548journal_volume
72pub_type
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