Abstract
The effect of potassium dihydrogen phosphate (KH2PO4) on callus induction and plant regeneration from callus cultures of indica rice (Oryza sativa cultivar Pusa Basmati-1) was investigated. Callus was induced on Murashige and Skoog (MS) medium supplemented with 11.31 μM 2,4-dichlorophenoxyacetic acid (2,4-D) and subsequent plant regeneration was obtained on MS medium containing 2.68 μM α-naphthaleneacetic acid (NAA) and 8.87 μM 6-benzylaminopurine (BAP). Both the induction and the regeneration media were supplemented with different levels of KH2PO4 (0 to12.50 mM). The level of KH2PO4 in the induction medium influenced the percent water content of the callus. KH2PO4 was found to be essential for plant regeneration as no shoot regeneration occurred in the absence of KH2PO4. Highest number of shoots per expiant was obtained when KH2PO4 level in the callus induction and plant regeneration medium was 0.625 mM (half of MS level) and 1.25 mM (normal MS level) respectively. By making amendments and modifications of the KH2PO4 level in the induction medium, the regeneration increased 2.5 folds. Almost similar regeneration frequency was observed from callus induced on lower levels of KH2PO4. Regenerated shoots were rooted on MS medium supplemented with 2.68 μM NAA. Rooted plantlets were transferred to soil where they survived and set seeds.
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Chauhan, M., Kothari, S.L. Influence of Potassium Dihydrogen Phosphate on Callus Induction and Plant Regeneration in Rice (Oryza sativa L.). CEREAL RESEARCH COMMUNICATIONS 33, 553–560 (2005). https://doi.org/10.1556/CRC.33.2005.2-3.119
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DOI: https://doi.org/10.1556/CRC.33.2005.2-3.119