THE CONSEQUENT EFFECT OF GROWTH RETARDANTS ON THE GROWTH AND DEVELOPMENT OF Tibouchina urvilleana Cogn. SHOOTS IN VITRO
Danuta Kozak
Agricultural University of LublinJarosław Grodek
Polish Academy of Sciences of LublinAbstract
The consequent effect of growth retardants: paclobutrazol – 0.1, 0.5, 1, 5 mg l-1, flurprimidol – 0.1, 1, 5 mg l-1, chlorocholine chloride (CCC) – 5, 50 mg l-1 on the growth and development of Tibouchina urvilleana Cogn. in vitro was examined. Paclobutrazol at concentration of 1 or 5 mg l-1 and flurprimidol at 5 mg l-1 inhibited the growth of shoots significantly. It was noted that shoots originating from these media had thicker, straighter stems and shorter internodes. The stimulating influence of CCC at 5 mg l-1 on the elongation of the main shoot was observed. Axillary shoots formation was the best when shoots were derived from the medium supplemented with flurprimidol 1 mg l-1. Paclobutrazol at 0.5 and 1 mg l-1 and flurprimidol at 5 mg l-1 influenced the formation and fresh weight of roots increase, but flurprimidol was more effective. Growth retardants (except paclobutrazol at 5 mg l-1) applied in the earlier passage stimulated elongation of roots.
Keywords:
Tibouchina urvilleana, growth retardants, in vitroReferences
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Agricultural University of Lublin
Polish Academy of Sciences of Lublin
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