Methyljasmonate Elicitation Increases Terpenoid Indole Alkaloid Accumulation in Rhazya stricta Hairy Root Cultures

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http://hdl.handle.net/10138/310564

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Akhgari , A , Laakso , I , Maaheimo , H , Choi , Y H , Seppänen-Laakso , T , Oksman-Caldentey , K-M & Rischer , H 2019 , ' Methyljasmonate Elicitation Increases Terpenoid Indole Alkaloid Accumulation in Rhazya stricta Hairy Root Cultures ' , Plants , vol. 8 , no. 12 , 534 . https://doi.org/10.3390/plants8120534

Title: Methyljasmonate Elicitation Increases Terpenoid Indole Alkaloid Accumulation in Rhazya stricta Hairy Root Cultures
Author: Akhgari, Amir; Laakso, Into; Maaheimo, Hannu; Choi, Young Hae; Seppänen-Laakso, Tuulikki; Oksman-Caldentey, Kirsi-Marja; Rischer, Heiko
Contributor: University of Helsinki, Faculty of Pharmacy
Date: 2019-12
Language: eng
Number of pages: 15
Belongs to series: Plants
ISSN: 2223-7747
URI: http://hdl.handle.net/10138/310564
Abstract: Methyl jasmonate is capable of initiating or improving the biosynthesis of secondary metabolites in plants and therefore has opened up a concept for the biosynthesis of valuable constituents. In this study, the effect of different doses of methyl jasmonate (MeJA) elicitation on the accumulation of terpenoid indole alkaloids (TIAs) in the hairy root cultures of the medicinal plant, Rhazya stricta throughout a time course (one-seven days) was investigated. Gas chromatography-mass spectrometry (GC-MS) analyses were carried out for targeted ten major non-polar alkaloids. Furthermore, overall alterations in metabolite contents in elicited and control cultures were investigated applying proton nuclear magnetic resonance (H-1 NMR) spectroscopy. Methyl jasmonate caused dosage- and time course-dependent significant rise in the accumulation of TIAs as determined by GC-MS. The contents of seven alkaloids including eburenine, quebrachamine, fluorocarpamine, pleiocarpamine, tubotaiwine, tetrahydroalstonine, and ajmalicine increased compared to non-elicited cultures. However, MeJA-elicitation did not induce the accumulation of vincanine, yohimbine (isomer II), and vallesiachotamine. Furthermore, principal component analysis (PCA) of H-1 NMR metabolic profiles revealed a discrimination between elicited hairy roots and control cultures with significant increase in total vindoline-type alkaloid content and elevated levels of organic and amino acids. In addition, elicited and control samples had different sugar and fatty acid profiles, suggesting that MeJA also influences the primary metabolism of R. stricta hairy roots. It is evident that methyl jasmonate is applicable for elevating alkaloid accumulation in "hairy root" organ cultures of R. strica.
Subject: Rhazya stricta
hairy root cultures
terpenoid indole alkaloids
methyl jasmonate elicitation
chemical analyses
principal component analysis (PCA)
PERFORMANCE LIQUID-CHROMATOGRAPHY
CELL-SUSPENSION CULTURES
SIGNAL-TRANSDUCTION
TROPANE ALKALOIDS
METHYL JASMONATE
GENE-EXPRESSION
BIOSYNTHESIS
METABOLITES
AJMALICINE
INDUCTION
1183 Plant biology, microbiology, virology
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