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Highlights: [•] Globally, the importance of bananas for food security is well known and documented. [•] Use of the micropropagation technique helps to meet increasing demand for bananas. [•] High rate of somaclonal variants remain a major bottleneck during micropropagation. [•] The role of BA and topolins on genetic fidelity was compared at same concentration. [•] Some topolins could reduce genetic variability among micropropagated plantlets. [ABSTRACT FROM AUTHOR]

Highlights: [•] A total of 47 endogenous cytokinin-forms grouped into 9 classes were quantified. [•] Tissue-cultured plants had more endogenous cytokinin levels than acclimatized plants. [•] 9-Glucosides were the major metabolites in tissue-cultured and acclimatized plants. [Copyright &y& Elsevier]

Abstract: Merwilla plumbea (Lindl.) Speta is an important medicinal plant widely used in traditional medicine. We evaluated the effect of five cytokinins [benzyladenine (BA), 2-isopentenyladenine (2iP), meta-topolin (mT), meta-topolin riboside (mTR), and meta-methoxy-9-tetrahydropyran-2-yl-topolin (MemTTHP)] on the level of phenolic acids and antioxidant activity of M. plumbea during the tissue culture and acclimatization stages. Two cytokinins (mT and mTR) significantly improved the antioxidant activity of tissue culture plantlets while the control plantlets were better after acclimatization. Using UPLC–MS/MS, the levels of hydroxybenzoic and hydroxycinnamic acid derivatives (phenolic acids) varied significantly during tissue culture and acclimatization, depending on the cytokinin and plant part analyzed. Vanillic acid (24.9μgg−1) detected in underground parts of tissue culture plants supplemented with BA was the most abundant phenolic acid detected. The current findings indicate that the phytochemicals together with the bioactivity during in vitro propagation of M. plumbea is influenced by the cytokinin type used and the stage of plant material collection. [Copyright &y& Elsevier]