Root contribution to nitrate reduction in barley seedlings (Hordeum vulgareL.)
β Scribed by A. Gojon; L. Passama; P. Robin
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 187 KB
- Volume
- 91
- Category
- Article
- ISSN
- 0032-079X
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The uptake of sulphate into roots of barley seedlings is highly sensitive to phenylglyoxal (PhG), an arginine-binding reagent. Uptake was inhibited by >80% by a 1-h pre-treatment of roots with 0.45 mol Β· m(-3) PhG. Inhibition was maximal in pre-treatment solutions buffered between pH 4.5 and 6.5. Ph
Nitrate reduction in roots and shoots and exchange of reduced N between organs were quantitatively estimated in intact 13-d-old seedlings of two-row barley (Hordeum vulgare L. cv. Daisengold) using the l SN-incorporation model (A. Gojon et al. (1986) Plant Physiol. 82, 254-260), except that NH2 was