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Shoot delta 15N correlates with genotype and salt stress in barley
- Handley, L.L., Robinson, D., Forster, B.P., Ellis, R.P., Scrimgeour, C.M., Gordon, D.C., Nevo, E., Raven, J.A.
- Planta 1997 v.201 no.1 pp. 100-102
- Hordeum vulgare subsp. spontaneum, nitrogen, stable isotopes, carbon, salinity, genetic variation, nutrition-genotype interaction, nitrogen content, shoots, genotype
- Given a uniform N source, the delta15N of barley shoots provided a genotypic range within treatments and a separation between control and salt-stress treatments as great as did delta13C. Plant delta15N has been represented in the literature as a bioassay of external source delta15N and used to infer soil N sources, thus precluding consideration of the plant as a major cause in determining its own delta15N. We believe this to be the first report of plant delta15N as a genetic trait. No mechanistic model is needed for use of delta15N as a trait in controlled studies; however, a qualitative model is suggested for further testing.