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Elicitor abiotic

Suvarnalatha, G.., Rajendran, L., and Ravishankar, G.A., Elicitation of anthocyanin production in cell cultures of carrot (Daucus carrota L.) by using elicitors and abiotic stress, Biotechnol Lett., 16, 1275, 1994. [Pg.433]

Other methods used to increase secondary product accumulation are elicitation, permeabilisation, product removal, immobilisation and differentiation. Elicitation is the triggering of plant defence mechanisms by the addition of abiotic and biotic elicitors. Elicitor refers to chemicals which can trigger physiologi-... [Pg.606]

Borie B, Jeandet P, Parize A, Bessis R, Adrian M. 2004. Resveratrol and stylbene synthase mRNA production in grapevine leaves treated with biotic and abiotic phytoalexin elicitors. Am J Enol Vitic 55 160-164. [Pg.534]

To increase production and facilitate isolation, plant cells have been immobilised on various matrices such as polyurethane foam and calcium alginate gel beads,24 while elicitation (i.e. the induction of a defence response) is generally critical for the production of secondary metabolites. The rationale for the use of elicitors is that plants produce secondary metabolites as part of a defence response to stress, either biotic (pathogen infection) or abiotic (ultraviolet, toxic heavy metals and rare earth ions). Jasmonic acid plays a crucial role in plant stress responses and, along with fungal polysaccharides and heavy metals, is the most widely employed elicitor in plant tissue cultures.30... [Pg.147]

Callus tissue was mixed, divided into 12 equal portions, and placed in incubation vials containing Gamborg s modified medium (19-20) and indicated concentrations of abiotic elicitor. Vials were Incubated for 24 hours. Callus was separated from medium, extracted with MEK, and medicarpin concentration determined by HPLC analysis of extracts (19). [Pg.68]

Abiotic elicitors, examples, 48 Abscisic acid, plant-growth hormone inhibitor, I6f Active defense, definition, 37 Alfalfa, phytoalexins, 56 Allelochemicals... [Pg.234]

On the other hand, and since alkaloids constitute a defense against certain environmental stresses, it is not surprising that the TIA pathway shows induction by several biotic and abiotic stress factors [6, 133-137], Among those, the induction by fungal elicitors has been particularly well characterized, together with the regulation by the plant stress hormone methyljasmonate [5, 9]. [Pg.830]

The use of elicitors can significantly enhance the production of metabolites. The elicitors are divided mainly in two groups. The biotic elicitors which are compounds of biological origin (e.g. fungal spores, fungal cell wall fractions, cellulase, chitosane) and the abiotic elicitors which include metal ions, high salt concentrations, UV radiations, sonication. Treatment of Hyoscyamus muticus hairy roots with 50-500 jig/ml of chitosane resulted in a 5-fold increase in the accumulation of hyoscyamine [84]. Similar results were obtained by Halperin and Flores [85] who obtained, with hairy roots of the same species, hyoscyamine up to 6-fold when elicited with mannitol. [Pg.743]

Elicitors are probably the best-studied exogenous signals in plants. They are connected with microbial infections and induce plant defense responses. Among others, the production of certain secondary metabolites (phytoalexins) is induced by biotic or abiotic elicitors (e.g., see reviews in refs. 326-328). [Pg.282]

The abiotic elicitor vanadyl sulfate increases alkaloid production (ajmali-cine, catharanthine) in C. roseus cell cultures (340,341). The effect is dependent on the age of the cells, the strongest effect being found during the stationary phase. According to Kargi and Potts (341), the treatment results in more excretion of the alkaloids to the medium. [Pg.284]

Another strategy for the improvement of secondary metabolites production is the addition of elicitors (biotic or abiotic) [68]. [Pg.140]

On the other hand. Furze et al. [78] observed that using abiotic compounds on D. stramonium hairy roots the sesquiterpenoid phytoalexin production was elicitated but no response was observed on tropane alkaloids production [78], Also, Pitta-Alvarez et al. [42, 45] reported that B. Candida hairy roots responded positively to different elicitors. Among them it can be mentioned chitosan, acetic acid and citric acid. These compounds promoted the release of alkaloids to the culture medium [42],... [Pg.140]

If the biosynthetic pathway it is known, the addition of precursors may stimulate the product formation. Also, the addition of biotic and abiotic elicitors is a strategy for the enhancement of secondaiy metabolites production. [Pg.141]

Advanced technology of a benchtop bioreactor has facilitated continuous extraction of secondary metabolites, which is designed for Catharanthus roseus L. (G.) and Santalum album in plant cell suspension cultures. C. roseus cells were exposed by biotic elicitors (Aspergillus niger, crude chitin), abiotic elicitors (mannitol, MJ), and induced the alkaloid production (Valluri 2009). [Pg.595]

QAs production can be stimulated by applying abiotic, for example, CuCl2, or biotic elicitors, so-called phytoalexins, prepared, for example, from cells of fungal mycelium [37]. [Pg.393]

Various biotic and abiotic elicitors have been used to increase colchicine production. Application of methyl jasmonate as a biotic elicitor in the media showed increase in growth of the root cultures of Gloriosa superba. Higher concentration of methyl jasmonate decreased growth but enhanced intracellular colchicine content of the root cultures. However, such treatments with methyl jasmonate did not release colchicine into the medium [22],... [Pg.471]

Different strategies, using in vitro systems, have been studied extensively with the objective of improving the production of colchicine, like media manipulation establishment of cell culture, organ culture, and root culture of colchicine-producing plants elicitation with biotic and abiotic elicitors etc. Instead of these progresses, production of colchicine at commercial scale is yet not achieved. [Pg.476]


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See also in sourсe #XX -- [ Pg.606 , Pg.609 ]




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