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Strategies for indole alkaloids enrichment through callus culture from Alstonia scholaris (L.) R. Br.

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Abstract

The present study was aimed to investigate the effect of different media, plant growth regulators, carbon sources, sucrose concentrations and pH of the medium for indole alkaloids (IAs) accumulation in the callus culture of Alstonia scholaris. The optimized conditions for the accumulation of IAs like echitamine, acetylechitamine, tubotaiwine and picrinine were found to be the MS medium supplemented with 0.3 mg/L of 2,4-D, 0.5 mg/L of FAP and 3% (w/v) sucrose with medium pH 5.8. Efforts were also made to standardize the enrichment protocols of these IAs by modulating concentration and incubation period of various elicitors and precursors. The quantitative analysis of IAs in callus samples was performed by using ultra high-performance liquid chromatography-mass spectrometry. Substantial enrichments of acetylechitamine (6.3780 mg/g DW i.e. ~ 15-fold) and echitamine (1.6513 mg/g DW i.e. ~ 12-fold) were found with 4.5 g/L KCl in 10 days incubation period, followed by tubotaiwine (0.0952 mg/g DW i.e. ~ 4-folds) with 3.0 g/L KCl in 10 days and picrinine (0.3784 mg/g DW i.e. ~ 4-fold) with 4.5 g/L KCl in 2 days.

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Abbreviations

IAs:

Indole alkaloids

PGRs:

Plant growth regulators

ZEA:

Zeatin

DW:

Dry weight

HPLC:

High performance liquid chromatography

UPLC:

Ultra performance liquid chromatography

MJ:

Methyl jasmonate

SA:

Salicylic acid

PEG:

Polyethylene glycol

CHI:

Chitosan

TRPH:

Tryptophan

TRYP:

Tryptamine

LOG:

Loganine

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Acknowledgements

A.J., Y.S., P.S., R.N. & C.J.B. are thankful to DBT, CSIR and UGC, New Delhi, for fellowships. We sincerely thank SAIF, CSIR-CDRI, for the analytical facilities. Authors acknowledge DST project (EMR/2016/006674; GAP0257) and DBT Project (BT/BIO-CARe/01/421/2011-12; GAP0180) for financial support. This is CDRI Communication No. 10007.

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Correspondence to Dipak Kumar Mishra.

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Jeet, A., Singh, Y., Singh, P. et al. Strategies for indole alkaloids enrichment through callus culture from Alstonia scholaris (L.) R. Br.. Plant Growth Regul 90, 383–392 (2020). https://doi.org/10.1007/s10725-019-00570-7

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  • DOI: https://doi.org/10.1007/s10725-019-00570-7

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