Journal
PLANT CELL TISSUE AND ORGAN CULTURE
Volume 118, Issue 3, Pages 373-381Publisher
SPRINGER
DOI: 10.1007/s11240-014-0489-1
Keywords
Acclimatisation; Aromatic cytokinin; Chlorophyll content; In vitro rooting; P. domestica; L.-P. insititia x domestica
Funding
- Italian Agricultural Ministry
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The effect of meta-Topolin (mT), an aromatic natural cytokinin, on micropropagation and adventitious shoot regeneration was evaluated on Prunus rootstocks, Torinel (Prunus domestica L.) and Ferdor (Prunus insititia x domestica). In vitro shoots were grown for three subcultures on a multiplication medium containing 2.1, 4.2 or 6.3 mu M of mT or 2.1 A mu M N (6)-benzyladenine (BA). Then, apical leaves were excised and transferred on a medium supplied with BA, thidiazuron (TDZ) or zeatin for adventitious regeneration. Shoots multiplied on 2.1 mu M mT or BA, were also induced to root with alpha-naphthalene acetic acid and acclimatized. meta-Topolin did not improve shoot proliferation, respect to BA, however, positively influences growth and quality of shoots. Ferdor from mT showed higher rooting percentage (92 %), root number and length, respect to the control, while a similar response was observed in Torinel with both cytokinins. Acclimatisation was higher than 90 % for both genotypes and, after 5 months, the highest length of roots was found in plants from mT. Adventitious regeneration was obtained only in leaves from shoots previously grown on mT. The highest regeneration responses, 65 and 42 %, respectively for Ferdor and Torinel, were obtained in the regeneration medium supplied with TDZ.
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