The impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi

Abstract

<jats:p>The main purpose of this study was to evaluate impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi and correlate it with a potential effects on the growth of plants under unfavorable conditions, in order to improve the efficiency of a phytoremediation process. The conducted research focused on the antifungal properties of PGPB. In this study, 51 isolates of bacteria were obtained after diversified disinfection time from plants growing on soil after sewage sludge amendment. The results revealed that some isolated bacteria, mainly endophytic ones, inhibited the development of Fusarium oxysporum, F. culmorum and Alternaria alternata.</jats:p>

Immobilisation of Selected Bacteria for Remediation on Various Media

“…Similar results were obtained in Eklahout et al, where positive effects of immobilization of Rhodobacter capsulatus using agar on pH stability during the process were documented [23]. Immobilized bacteria also impact on the control of phytopathogenic fungal populations [24]. Immobilization of microorganisms on media is an effective method of reducing the effect of stress factors on the populations of microorganisms introduced into the soil environment.…”

“…on alginate, acrylamide [17], 3-chloroaniline [18] and 2-chloroethanol [19]. Frequently used media also include polyurethane [20], agar [21][22][23] and kappa-carrageenan [24]. The highest number of microorganisms in the soil for the applied bacterial consortium immobilized on alginate with 50% (v/v) of biocarbonate was noted in the conducted studies.…”

Identificación de rizobios promotores del crecimiento vegetal asociados a garbanzo (Cicer arietinum L.)

“…Para obtener la actividad antagonista de las PGPB, se utilizó el método descrito por Goberlak et al (2014). Se prepararon suspensiones celulares desde los aislados en 9 mL de agua destilada estéril, a una concentración aproximada de 10 8 UFC/mL, según escala de McFarland (1907).…”

Bacteria-Plant interactions: an added value of microbial inoculation

“…They can affect plant growth through direct and indirect mechanisms (Ngoma et al 2012). Direct mechanisms are related with a forward and a direct promotion of plant growth (Kudan et al 2015); while indirect involves the ability of PGPB to diminish negative effects of phytopathogens (Grobelak et al 2014, Zúñiga et al 2019. These include bacteria assistance for plant nutrient acquisition, modulation of phytohormones levels, production of antimicrobial compounds against phytopathogenic microorganisms, induction of systemic resistance against pathogens and competition ability, among others (Eida et al 2018).…”