Abstract
Shoot and root mass of tobacco plants treated with only 0.05 µM boron was decreased by 25 and 50 %, respectively, when compared to plants sufficiently supplied with B (2 and 5 µM). Leaf B content of 0.05 µM B-treated plants decreased (about 80–90 %) when compared to 2 µM B treated plants; this drop of B content were not as marked (about 25–45 %) in roots. Leaf and root nitrate contents in B-deficient plants were 45–60 % and 35–45 % lower, respectively, than those from 2 and 5 µM B treated plants. It is suggested that B deficiency might decrease nitrate uptake rather than nitrate reductase activity in tobacco plants.
Abbreviations
- d.m.:
-
dry mass
- f.m.:
-
fresh mass
- Nia :
-
nitrate reductase structural gene
- NR:
-
nitrate reductase
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Matas, M.A., González-Fontes, A. & Camacho-Cristóbal, J.J. Effect of boron supply on nitrate concentration and its reduction in roots and leaves of tobacco plants. Biol Plant 53, 120–124 (2009). https://doi.org/10.1007/s10535-009-0016-0
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DOI: https://doi.org/10.1007/s10535-009-0016-0