Effect of boron supply on nitrate concentration and its reduction in roots and leaves of tobacco plants |
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Authors: | M. A. Matas A. González-Fontes J. J. Camacho-Cristóbal |
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Affiliation: | (1) Departamento de Fisiología, Anatomía y Biología Celular, Facultad de Ciencias Experimentales, Universidad Pablo de Olavide, E-41013 Sevilla, Spain |
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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. |
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Keywords: | KeywordHeading" >Additional boron deficiency hydroponic culture Nicotiana tabacum nitrate assimilation |
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