Bacterial Endophytes as Elicitors of Induced Systemic Resistance

Modulation of Quorum Sensing in Acyl-homoserine Lactone-Producing or -Degrading Tobacco Plants Leads to Alteration of Induced Systemic Resistance Elicited by the Rhizobacterium Serratia marcescens 90-166

“…lachrymans, P. carotovorum, blue mold, CMV, and even cucumber beetles in the systemic tissues of many crop plants and Arabidopsis thaliana (Enebak and Carey, 2000;Kloepper et al, 2004;Kloepper and Ryu, 2006;Press et al, 1997;Press et al, 2001;Raupach et al, 1996;Ryu et al, 2004b;Zhang et al, 2002). Even though S. marcescens 90−166 secretes SA exogenously, inoculation of a SA-negative mutant into the roots of tobacco plants maintained ISR to P. syringae pv.…”

“…marcescens 90−166 is a well-known PGPR strain. When applied to seeds or roots, it results in ISR to a broad spectrum of foliar pathogens, including bacterial, fungal, and viral pathogens (Kloepper and Ryu, 2006). The salicylic acid (SA) non-producing mutant of S. marcescens 90−166 retained ISR to anthracnose in cucumber and to Cucumber mosaic virus (CMV) in Arabidopsis, while the iron-chelation enzyme null mutant abolished ISR capacity against anthracnose in cucumber but had no effect against CMV in Arabidopsis ( Press et al, 2001;Ryu et al, 2004b).…”

Diversity and Characterization of Endophytic Bacteria Associated with Tidal Flat Plants and their Antagonistic Effects on Oomycetous Plant Pathogens

“…In addition to antibiotic and hydrolytic enzyme production, strain YC6887 also showed growth promotion of A. thaliana. Growth promotion of plants is another key factor to be considered in the development of endophytic bacteria as biocontrol agents, since the selected bacteria may indirectly affect the pathogenicity of fungal pathogens by simultane-ous induction of systemic resistance of host plants (Kloepper and Ryu, 2006;Manjula et al, 2002). Presently, strain YC6887 was shown to solubilize phosphate and produce IAA, which may be instrumental in mediating plant growth promotion.…”

An evaluation in vitro and in vivo of rhizobacteria in the biocontrol of Radopholus similis in banana

“…A great number of reports are found in the literature regarding bacteria of the Pseudomonas and Bacillus genera acting as biocontrol agents of plant pathogens. The biocontrol of nematodes by bacteria happens by direct production of toxic compounds, modification of root exudates or induction of resistance in the host plant (Kloepper and Ryu, 2006; *Corresponding author. E-mail: celmapeixoto22@gmail.com.…”