Glutamine Synthetase Activity and Foliar Nitrogen Volatilization in Response to Temperature and Inhibitor Chemicals*
- 1 March 1986
- journal article
- research article
- Published by Oxford University Press (OUP) in Annals of Botany
- Vol. 57 (3) , 305-307
- https://doi.org/10.1093/oxfordjournals.aob.a087111
Abstract
In soyabeans (Glycine max (L.) Merr.), glutamine synthetase (GS) activity was greater at 28 °C than at 35 °C. The reverse was true for foliar-N loss. In field-grown plants at 29 °C, the GS activity was higher and foliar-N loss was lower in soyabeans than in Amaranthus palmeri (S.) Wats. Methionine sulphoximine, a GS inhibitor, and 6-diazo-5-oxo-L-norleucine, a glutamate synthase inhibitor, significantly increased foliar-N loss from soyabeans. The data suggest that conditions conducive to decreased GS or glutamate synthase activity may result in increased foliar-N loss.Keywords
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