<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of the present investigation was to optimize protocols for micropropagation and adventitious shoot regeneration from leaf explants of two wild ecotypes of red flesh apple <italic>Malus niedzwetzkyana</italic> for future breeding programs. At the proliferation stage, different concentrations of sodium nitroprusside (SNP) and triacontanol (TRIA) were compared. To optimize shoot regeneration from leaf explants, interactive effects of 1-phenyl-3-(1,2,3-thidiazol-5-yl)-urea – thidiazuron (TDZ), indole-3-butyric acid (IBA) and two explant types were investigated. At rooting stage, the effect of exposure time of microshoots to darkness and exposure time to different concentrations of IBA and α-naphthalene acetic acid (NAA) were compared. The results showed that SNP affected the growth rate significantly and the maximum multiplication rates per explant (9.6 in the first ecotype and 8.8 in the second) were produced in the Quoirin and Lepoivre medium containing 17 SNP µM, in addition to 4 µm 6-benzylaminopurine (BAP) and 3 µm gibberellic acid (GA<sub>3</sub>). IBA and TDZ affected the adventitious shoot regeneration from leaf explants significantly, the highest number of regenerated shoots (18.3 per explant) was obtained from the basal section of the leaves cultured on the medium containing 2 μM IBA and 15 μM TDZ. At rooting stage, the maximum rooting (88.6%) was obtained in the result of one weak exposure to darkness on medium containing 3 μM IBA.</p></abstract>

The aim of the present investigation was to optimize protocols for micropropagation and adventitious shoot regeneration from leaf explants of two wild ecotypes of red flesh apple Malus niedzwetzkyana for future breeding programs. At the proliferation stage, different concentrations of sodium nitroprusside (SNP) and triacontanol (TRIA) were compared. To optimize shoot regeneration from leaf explants, interactive effects of 1-phenyl-3-(1,2,3-thidiazol-5-yl)-urea – thidiazuron (TDZ), indole-3-butyric acid (IBA) and two explant types were investigated. At rooting stage, the effect of exposure time of microshoots to darkness and exposure time to different concentrations of IBA and α-naphthalene acetic acid (NAA) were compared. The results showed that SNP affected the growth rate significantly and the maximum multiplication rates per explant (9.6 in the first ecotype and 8.8 in the second) were produced in the Quoirin and Lepoivre medium containing 17 SNP µM, in addition to 4 µm 6-benzylaminopurine (BAP) and 3 µm gibberellic acid (GA3). IBA and TDZ affected the adventitious shoot regeneration from leaf explants significantly, the highest number of regenerated shoots (18.3 per explant) was obtained from the basal section of the leaves cultured on the medium containing 2 μM IBA and 15 μM TDZ. At rooting stage, the maximum rooting (88.6%) was obtained in the result of one weak exposure to darkness on medium containing 3 μM IBA.

Sodium Nitroprusside Stimulates Micropropagation and TDZ Induces Adventitious Shoots Regeneration in Red Flesh Apple <italic>Malus niedzwetzkyana</italic> Koehne Dieck ex

Department of Tissue and Cell Culture, Agricultural Biotechnology Research Institute of Iran (ABRII) Agricultural Research

Temperate Fruits Research Center, Horticultural Sciences Research Institute

Journal of Horticultural Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Sodium Nitroprusside Stimulates Micropropagation and TDZ Induces Adventitious Shoots Regeneration in Red Flesh Apple  Koehne Dieck ex

The aim of the present investigation was to optimize protocols for micropropagation and adventitious shoot regeneration from leaf explants of two wild ecotypes...

Sodium Nitroprusside Stimulates Micropropagation and TDZ Induces Adventitious Shoots Regeneration in Red Flesh Apple Malus niedzwetzkyana Koehne Dieck ex

Publié en ligne: 31 déc. 2019

Pages: 23 - 30

Reçu: 01 mars 2019

Accepté: 01 août 2019

DOI: https://doi.org/10.2478/johr-2019-0014

Mots clés
adventitious regeneration, leaf explants, micropropagation, rooting

© 2019 Nooshin Kazemi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Sodium Nitroprusside Stimulates Micropropagation and TDZ Induces Adventitious Shoots Regeneration in Red Flesh Apple Malus niedzwetzkyana Koehne Dieck ex

Publié en ligne: 31 déc. 2019

Pages: 23 - 30

Reçu: 01 mars 2019

Accepté: 01 août 2019

DOI: https://doi.org/10.2478/johr-2019-0014

Mots clésadventitious regeneration, leaf explants, micropropagation, rooting

© 2019 Nooshin Kazemi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
adventitious regeneration, leaf explants, micropropagation, rooting