Phenylpropanoids, Phenylalanine Ammonia Lyase and Peroxidases in Elicitor‐challenged Cassava (Manihot esculenta) Suspension Cells and Leaves

Abstract

Phenolic levels in cells were not enhanced and were, theoretically, too low to be inhibitory. However, in combination and when oxidized they may contribute to defence, because oxidation of esculetin and scopoletin by peroxidase and of esculetin by tyrosinase enhanced their fungitoxicity up to 20-fold.

Abiotic elicitors mediated elicitation of innate immunity in tomato: an ex vivo comparison

“…Consequently, this study could diminish the application of injurious chemicals and provide growers with new alternatives for sustainable agriculture (Hammond-Kosack and Parker 2003;Mejía-Teniente et al 2010). Detailed exploitation of defense signaling cascades has led to the finding of hazard free compounds known as elicitors which are able to induce defense responses in plants ( Gómez-Vásquez et al 2004). In this scenario, extensive research have been devoted for the detection and expansion of natural and semi-synthetic compounds from all sources to trigger immune responses in plants (Goupil et al 2012;Chandra et al 2014a).…”

Elicitation of peroxidase activity in genetically transformed root cultures of Beta vulgaris L

“…Elicitors are compounds of biological or non-biological origin, which upon contact with plant cells, trigger defenserelated compounds through over-expression of relevant enzymes (Singh, 1999;Gómez-Vásquez et al 2004). It is well established that these defence-related responses are activated through a signal transduction pathway that includes the recognition of elicitors by receptors located in the plasma-membrane, activation of ion fluxes across the membrane, induction of down-stream functions such as oxidative bursts (free radical formation) and formation of secondary messengers (Radman et al 2003).…”

“…The secondary products and the respective enzymes, particularly those of phenylpropanoid pathway are significantly enhanced under the influence of elicitors. Peroxidase (POD) is one such enzyme associated with the plant defense pathway and is elicited when challenged with elicitors (Gómez-Vásquez et al 2004;Perera and Jones, 2004). Since this enzyme also has various commercial applications, the present communication is focused on developing a strategy for eliciting POD enzyme that is associated with secondary metabolites of defence functions.…”

Effect of Methyl Jasmonate on Disease Severity and Expression of Plant Defensin Gene during Alternaria brassicae Infection in Arabidopsis

“…During plant-pathogen interaction, responses of plants/host towards the pathogen occurred through signal transduction (Gómez-Vásquez et al, 2004). Plants can activate separate defense pathways depending on the type of pathogen encountered (Garcia-brugger et al, 2006].…”