Plant Growth-Promoting Microbes (PGPM) as Potential Microbial Bio-Agents for Eco-Friendly Agriculture

Composition, Structure, and PGPR Traits of the Rhizospheric Bacterial Communities Associated With Wild and Cultivated Echinocactus platyacanthus and Neobuxbaumia polylopha

“…Prosopis articulate Kim et al, 2007;Galaviz et al, 2018 Ep/Np Sphingomonas Halotolerant; N fixation; denitrification; IAA and gibberellic acid production Boswellia sacra, Prosopis articulate Maheshwari et al, 2015;Yang et al, 2016;Gangwar et al, 2017;Galaviz et al, 2018;Al-Harrasi et al, 2019 Ep/Np Sequences of these genera were abundant in one or both of our rhizospheric samples (last column). § There are no available reports of these bacterial genera in association with plants growing in ASZ.…”

When Salt Meddles Between Plant, Soil, and Microorganisms

“…An alternative to the use of chemicals is the use of PGPRs and PGPFs, which could synthesise the aforementioned lytic enzymes, siderophores, IAA, and antibiotics. These compounds could reduce and inhibit phytopathogens that cause plant infections (Labuschagne et al, 2010;Murali et al, 2012;Gangwar et al, 2017). Trichoderma isolates widely used in bio-fungicidal formulations can be ineffective at high salinity conditions, since most of these fungal species have a low osmotolerance (Mohamed and Haggag, 2006;Bheemaraya et al, 2013).…”

“…According to Gangwar et al (2017) and Egamberdieva et al (2019), an ideal plant growth-promoting microorganisms (PGPMs) should possess a high rhizosphere competence, enhance plant growth capabilities, have a broad spectrum of action, be safe to the environment, be compatible with other rhizobacteria, and be tolerant to heat, UV radiation, and oxidizing agents. So far, organisms with interesting properties have been isolated, and some possess more than one of the qualities required for a perfect PGPR, however, imagining such an ideal organism capable of accomplishing all the necessary actions, is a kind of extreme.…”

“…Plant growth-promoting fungi (PGPFs) are soil-borne, non-pathogenic, saprophytic microorganisms. This group contains several fungal taxa, and among the most quoted genera, especially in saline environments, there are Penicillium spp., Fusarium spp., Alternaria spp., Aspergillus spp., Sclerotium spp., and Phoma spp., which colonise plants roots and form symbiotic interactions with them ( Gangwar et al., 2017 ; Naziya et al., 2020 ). Pereira et al (2019) , for example, surveyed the culturable endophytic mycobiota of Festuca rubra , a perennial grass diffused in coastal environments with low nutrient availability, wind, and salinity.…”

Response of Lentil to Crude Humates and Rhizobacteria Inoculation under Calcareous Soils Conditions

“…Biological preparations, containing one or more culturable microorganisms and perform beneficial actions toward the plant growth, are commonly announced as biofertilizers (Borkar, 2015). Such included microorganisms are termed as Yield-Increasing Bacteria (YIB) (Shen, 1997); Plant growth-promoting and bioprotecting rhizobacteria (PGPBR) (Luz, 2001); Plant Health Promoting Rhizobacteria (PHPR) (Reimann & Sikora, 2003); Plant Growth-Promoting Microbes (PGPM) (Gangwar et al, 2017) and popularly as plant growth-promoting rhizobacteria (PGPR) (Castro-Sowinski et al, 2007;Lugtenberg & Kamilova, 2009;Etesami & Maheshwari, 2018). The biofertilizers could stimulate plant growth using one or more active mechanisms resulting in direct or indirect action.…”