Enhanced Production of Antihypertensive Drug Ajmalicine in Transformed Hairy Root Culture of Catharanthus Roseus by Application of Stress Factors in Statistically Optimized Medium

AbstractValerenic acid (VA) is a pharmacologically-active sesquiterpene found in valerian (Valeriana officinalis L., Valerianaceae) roots and rhizomes. The plant produces only small amounts of this metabolite naturally. So, induction of hairy roots as well as elicitation can be useful to increase its commercial production. In this study, Wild-type strain ‘A13’ of Agrobacterium rhizogenes was used to induce hairy roots in valerian. The influence of three different elicitors including Fusarium graminearum extract (FE), methyl jasmonate (MJ) and salicylic acid (SA) on VA production in the selected hairy root line ‘LeVa-C4’ was also investigated. The 23-day-old cultures were treated with different concentrations of the elicitors at exposure time of 3 and 7 days. FE (1%) and MJ (100 µM L−1) highly promoted VA production at 7 days after elicitation, to a level of 12.31- and 6-fold higher than that of non-elicited controls, respectively, and FE did not exert any negative effects on biomass yield of hairy root. SA did not significantly increase the production of VA. This is the first time study to assess the elicitation of hairy root cultures to promote VA biosynthesis in valerian and the resulting experiments demonstrated that F. graminearum extract and MJ were indeed a potent inducer of VA biosynthesis.

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Silencing of quinolinic acid phosphoribosyl transferase (QPT) gene for enhanced production of scopolamine in hairy root culture of Duboisia leichhardtii

Scientific Reports ◽

10.1038/s41598-018-32396-0 ◽

2018 ◽

Vol 8 (1) ◽

Cited By ~ 3

Author(s):

Pooja Singh ◽

Ratnum Prasad ◽

Rashi Tewari ◽

Meraj Jaidi ◽

Susheel Kumar ◽

...

Keyword(s):

Hairy Root ◽

Quinolinic Acid ◽

Root Culture ◽

Hairy Root Culture ◽

Phosphoribosyl Transferase ◽

Enhanced Production

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Advances and Perspectives in Tissue Culture and Genetic Engineering of Cannabis

International Journal of Molecular Sciences ◽

10.3390/ijms22115671 ◽

2021 ◽

Vol 22 (11) ◽

pp. 5671

Author(s):

Mohsen Hesami ◽

Austin Baiton ◽

Milad Alizadeh ◽

Marco Pepe ◽

Davoud Torkamaneh ◽

...

Keyword(s):

Plant Regeneration ◽

Genetic Engineering ◽

Suspension Culture ◽

Secondary Metabolite ◽

Hairy Root ◽

Root Culture ◽

Hairy Root Culture ◽

Gene Transformation ◽

Secondary Metabolite Production ◽

Metabolite Production

For a long time, Cannabis sativa has been used for therapeutic and industrial purposes. Due to its increasing demand in medicine, recreation, and industry, there is a dire need to apply new biotechnological tools to introduce new genotypes with desirable traits and enhanced secondary metabolite production. Micropropagation, conservation, cell suspension culture, hairy root culture, polyploidy manipulation, and Agrobacterium-mediated gene transformation have been studied and used in cannabis. However, some obstacles such as the low rate of transgenic plant regeneration and low efficiency of secondary metabolite production in hairy root culture and cell suspension culture have restricted the application of these approaches in cannabis. In the current review, in vitro culture and genetic engineering methods in cannabis along with other promising techniques such as morphogenic genes, new computational approaches, clustered regularly interspaced short palindromic repeats (CRISPR), CRISPR/Cas9-equipped Agrobacterium-mediated genome editing, and hairy root culture, that can help improve gene transformation and plant regeneration, as well as enhance secondary metabolite production, have been highlighted and discussed.

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A reliable and efficient protocol for induction of hairy roots in Agastache foeniculum

Biologia ◽

10.2478/s11756-014-0382-8 ◽

2014 ◽

Vol 69 (7) ◽

Cited By ~ 16

Author(s):

Elnaz Nourozi ◽

Bahman Hosseini ◽

Abbas Hassani

Keyword(s):

Salicylic Acid ◽

Agrobacterium Rhizogenes ◽

Hairy Root ◽

Hairy Roots ◽

High Performance ◽

Root Culture ◽

Hairy Root Culture ◽

Biochemical Properties ◽

Separate Experiment ◽

Transformed Roots

AbstractHairy root culture system is a valuable tool to study the characteristics of gene expression, gene function, root biology, biochemical properties and biosynthesis pathways of secondary metabolites. In the present study, hairy roots were established in Anise hyssop (Agastache foeniculum) via Agrobacterium rhizogenes. Three strains of Agrobacterium rhizogenes (A4, A7 and 9435), were used for induction of hairy roots in four various explants (hypocotyl, cotyledon, one-month-old leaf and five-month-old leaf) of Anise hyssop. The highest frequency of transformation was achieved using A4 strain in one-month-old leaves (51.1%). The transgenic states of hairy root lines were confirmed by PCR (Polymerase chain reaction) method. High performance liquid chromatography analysis revealed that the production of rosmarinic acid (RA) in transformed roots of A. foeniculum was almost 4-fold higher than that of the non-transformed roots. In a separate experiment, hairy roots obtained from one-month-old leaves inoculated with A4 strain, were grown in liquid medium and the effects of different concentrations of salicylic acid (0.0, 0.01, 0.1 and 1 mM) and chitosan (0, 50, 100 and 150 mg L−1) (as elicitor) and sucrose (20, 30, 40 and 50 g L−1) on the growth of hairy roots were evaluated. The results showed that, 30 g L−1 sucrose and 100 mg L−1 chitosan increased the biomass of hairy root cultures and application of salicylic acid reduced the growth of hairy roots compared with control roots.

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