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Silício No Desenvolvimento In Vitro Da Orquídea Cattleya Forbesii
Authors
Colombo R.C.
De Andrade F.A.
+3 more
De Faria R.T.
Favetta V.
Melem V.M.
Publication date
17 August 2017
Publisher
'Editora da Universidade Federal Rural do Semi-Arido - EdUFERSA'
Abstract
Addition of Silicon (Si) to culture media has been shown to improve the development of seedlings grown in vitro, and to reduce losses during the acclimatization phase. The objective of this study was to evaluate the in vitro growth of Cattleya forbesii (Orchidaceae) in MS medium containing five different concentrations of SiO2 (0.0, 0.5, 1.0, 1.5, and 2.0 g·L−1). At day 200, the following variables were measured: number of roots, average length of the root system, leaf area, number of leaves and shoots, shoot height, fresh and dry masses of roots and shoots, water content of roots and shoots, and pH of the culture medium. Most variables decreased as the concentration of Si increased, reducing the in vitro vegetative growth of C. forbesii. Accumulation of Si in leaf tissues was detected by scanning electron microscopy, confirming uptake by plants. The Si source and concentrations tested showed no beneficial effect on in vitro growth of C. forbesii. © 2016, Universidade Federal Rural do Semi-Arid. All rights reserved.291182
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Last time updated on 10/04/2020