Pseudomonas aeruginosaWS-1 for biological control of leaf blight disease ofWithania somnifera

Isolation, screening and in vitro evaluation of bacterial antago-nists from spent mushroom substrate against Colletotrichum musae

“…The present study revealed that P. aeruginosa is capable of producing volatile substances and diffusible substances with antifungal properties that significantly inhibited the mycelia growth of C. musae on PDA. Production of volatile antimicrobials by P. aeruginosa has also been reported in numerous occasions (Baligh et al 1996, Conway et al 1989, Rahman et al 2007, Maiti, et al 2012). This approach offers an efficient, economical and environmentally sound means of suppressing the disease.…”

“…Masyahit et al (2009) also reported the antagonistic association between Pseudomonas aeruginosa and C. gloeosporioides in dragon fruit. There are many other reports on the efficacy of Pseudomonas aeruginosa as a potential biocontrol agent for various phytopathogenic fungi (Siddiqui and Shaukat 2002, Mansoor et al 2007, Prakob et al 2009, Deshwal 2012, Maiti et al 2012.…”

“…Pseudomonas strains are known to produce numerous compounds which are responsible for disease control. These inhibitory compounds are siderophores, HCN, degradative extracellular enzymes such as chitinase, protease, cellulose, β-1,3 glucanase and antibiotics such as pyrrolnitrin, pyoluteorin, phenazine (Dowling and O'gara, 1994, Choi et al., 2006, Deshwal et al, 2011, Maiti, et al. 2012.…”

Plant-Growth-Promoting Rhizobacteria (PGPR) and Medicinal Plants

“…It is used for the treatment of ulcers, arthritis, anxiety, insomnia, tumors, tuberculosis, asthma, and leukoderma and as a sex stimulant and important component of DPT vaccine (Gautam et al 2004;Bhatnagar et al 2005;Rasool and Varalakshmi 2006;. Leaf blight disease caused by the fungus Alternaria dianthicola (Militi et al 2012); root knot/wilt complex caused by soilborne pathogens Fusarium chlamydosporum, Ralstonia solanacearum, and Meloidogyne incognita (Mallesh et al 2009); and root rot caused by Fusarium solani ) are the major yield constraints of W. somnifera.…”

“…Foliar application of a talc-based formulation of PGPR Pseudomonas aeruginosa strain WS-1 to field-grown W. somnifera reduced disease severity by 80 % compared to non-treated control (Militi et al 2012). PGPR-treated plants provided extended protection against soilborne pathogens Fusarium chlamydosporum, Ralstonia solanacearum, and Meloidogyne incognita, causing root knot/wilt complex, in Coleus forskohlii and W. somnifera (Mallesh et al 2009).…”