Systemic elicitation of defense related enzymes suppressing Fusarium wilt in mulberry (Morus spp.)

Abstract

Antagonist and organic amendments based bioconsortia (seri bed waste+Pf1+Bs4+Th1+neem cake) was found to lead the restriction of Fusarium solani pathogen in mulberry roots mainly by inducing inherent defense enzymes. Induction of defense enzymes such as peroxidase, polyphenoloxidase, phenylalanine ammonia lyase, phenols, catalase and superoxide dismutase, was studied in mulberry plants pretreated with bioconsortia and comparative fungicides challenged inoculation with Fusarium solani in glasshouse condition. There was increased expression of defense enzymes in mulberry plants treated with bioconsortia, when compared to control. The bio-chemical reaction of the above defense enzymes started to increase at the 3rd day, reached maximum on the 5th day and thereafter declined gradually. The native polyacrylamide gel electrophoresis (PAGE) experiment showed that one to four isoforms of the defense enzymes each with greater intensity were expressed in these treatments. This is indicating that the restriction of F. solani in mulberry plants was mainly due to application of microbial bio-consortia.

Strategic eco-friendly management of post-harvest fruit rot in papaya caused by Colletotrichum gloeosporioides

“…Although several management practices have been developed to control the pathogen, the present investigation is focused on eco-friendly management strategies that facilitate to reduce the chemical usage and additionally increased consumer demands for agricultural commodities without pesticide residues (Siddiqui and Ali, 2014). Among the various alternatives, use of bio-control agents and natural plant products, including essential oils that are environmentally safe and biodegradable, are catching the attention of scientists worldwide and it has been considered as a novel approach, as it requires low amount of chemical, by reducing the cost of control as well as pollution hazardous (Narayanan et al, 2016;Parthasarathy et al, 2016a). Keeping above view, the present work was undertaken to evaluate the efficacies of different biocontrol agents, plant extracts and essential oils for the management of papaya anthracnose causing C. gloeosporioides.…”

Expression of Defense Responses in Tomato against Vascular Wilt and Fruit Borer through Consortia of Fluorescent Pseudomonads and Entomopathogenic Fungi

“…PGPR and PGPF systemically activate the plant's latent defense mechanism against pathogens called Induced Systemic Resistance (ISR) (Narayanan et al, 2016). Recent studies on mechanisms of biological control by PGPR reveal that several strains protect the plants from pest and pathogen attack by enhancing innate immunity and plant growth promotion activities.…”

Bacterial antagonists and hexanal-induced systemic resistance of mango fruits against Lasiodiplodia theobromae causing stem-end rot

“…It is well known that induction of systemic resistance is mechanism by which plant defense networks are activated by bacteria to fight against pathogen infection (Kloepper et al 2004). Combined application of two or more biocontrol agents with preferred substrates, which in turned out to be more efficient than either of them alone (Narayanan et al 2016). Therefore, use of compatible bacterial antagonist as consortia would emphasize more effective against postharvest diseases (Sangeetha et al 2010).…”