Biodiversity and biotechnological applications of novel plant growth promoting methylotrophs

Abstract

production of siderophores, ammonia, HCN, enzymes and secondary metabolites. 16,17 The plant growth promoting methylotrophs as single bioinoculants or with co-inoculated as microbial consortium may be use as bioinoculants/biofertilizers of biocontrol agents for enhanced crops production and soil fertility for sustainable agriculture. 18-21 The different class α, β and γ-proteobacteria of methylotrophic bacteria communities have been reported worldwide. The class α-proteobacteria has been reported as most dominant followed by β-proteobacteria. The novel methylotrophic microbes have been isolated and characterized from different habitats worldwide including Methylocella silvestris BL2T , Methylocella palustris KT, Methyloferula stellata AR4T and Methylocapsa acidiphila B2T from acidic soil; 22-25 Methylobacterium tarhaniae N4211T from arid soil; 26 Methylobacterium iners 5317S-33T and Methylobacterium aerolatum 5413S-11T from air sample; 27 Methylobacterium adhaesivum AR27T and Methylobacterium isbiliense AR24T from drinking water; 28,29 Methylobacterium brachiatum B0021T, Methylobacterium gregans 002-074T, Methylobacterium komagatae 002-079T, Methylobacterium persicinum 002-165T and Methylobacterium tardum RB677T from freshwater sample; 30 Methylobacterium organophilum XX, Methylotenera versatilis 301T and Methylotenera mobilis JLW8T from lakes; 31-33 Methylobacterium brachythecii 99bT, Methylobacterium cerastii C44, Methylobacterium gnaphalii 23eT, Methylobacterium gossipiicola Gh-105T, Methylobacterium haplocladii 87eT, Methylobacterium oxalidis 35aT, Methylobacterium phyllosphaerae B27T, Methylobacterium phyllostachyos BL47T, Methylobacterium platani PMB02T, Methylobacterium pseudosasicola BL36T, Methylobacterium thuringiense C34T, Methylobacterium trifolii TA73T, from leaf surface of diverse plants; 34-42 Methylobacterium aminovorans TH-1, Methylobacterium goesingense iEII3, Methylobacterium soli YIM 48816T, Methylobacterium suomiense, F20T, Methylobacterium thiocyanatum, Methylobacterium variabile GR3T, Methylopila capsulata IM1T, and Methylopila helvetica VKMB-189 from soil samples 43-50

Psychrotolerant Mesorhizobium sp. Isolated from Temperate and Cold Desert Regions Solubilizes Potassium and Produces Multiple Plant Growth Promoting Metabolites

“…Studies have also shown that different species of KSB exist in the soil and play a vital role in the K cycle [ 42 , 43 ]. Potassium solubilizing bacteria (KSB) are involved in the natural potassium cycle, and therefore, the presence of KSB in the soil makes potassium available for uptake by plants [ 22 , 44 ]. However, few studies on KSB isolation from the cold regions are available in the literature, and the isolates of the present study were cold tolerant for their adaptation of surviving and functioning under cold climatic conditions.…”

Rhizospheric bacteria from the Atacama Desert hyper-arid core: cultured community dynamics and plant growth promotion

“…On the other hand, the Ammophilus genus is very interesting because it is an oxalotrophic bacteria that can secrete organic matter hydrolases to accelerate substance degradation and promote nutrient recycling (Wang et al, 2022). Although there are no reports that associate Ammoniphilus with plant growth promotion if it has been detected in rhizosphere soils (Yadav and Saxena, 2018; Abuauf et al, 2022). Interestingly, two members of this genus are part of the co-occurring community, being one of them also identified as a keystone species.…”

Prospect of pink pigmented facultative methylotrophs in mitigating abiotic stress and climate change

“…Phyllosphere is directly exposed to harsh environmental conditions such as temperature, relative humidity, and UV radiations that present a unique challenge in determining the microbial abundance. Genus Methylobacterium is widely distributed on phyllosphere viz M. brachythecii 99bT, M. cerastii C44, M. gnaphalii 23eT, M. gossipiicola Gh-105T, M. haplocladii 87eT, M. oxalidis 35aT, M. phyllosphaerae B27T, M. phyllostachyos BL47T, M. platani PMB02T, M. pseudosasicola BL36T, M. thuringiense C34T, M. trifolii TA73T, M. populi, M. thiocyanatum, M. suomiense, M. aminovorans, and M. fujisawaense isolated from various leaf surfaces of plants [16,18]. Metaproteogenomics studies of different plant species revealed the predominance of Methylobacterium sp.…”

“…The most common species in rhizosphere belong to genera Methylophilus, Methylovorus, Methylobacterium sp., Methylobacterium soli, Methylobacterium goesingense, Methylobacterium variabile, Methylobacterium suomiense, Methylopila helvetica, Methylobacterium thiocyanatum, Methylopilacapsulata and Methylobacterium aminovorans [1,17]. From soil samples, M. aminovorans TH‐1, M. goesingense iEII3, M. soli YIM 48816T, M. suomiense , F20T, M. thiocyanatum, M. variabile GR3T, M. capsulata IM1T, and M. helvetica VKMB‐189 are also recovered [16]. Other methylotrophs detected in the rhizosphere through metaproteogenomics were Methylotenera species and members of Burkholderiales, expressing either the MxaFI‐type or the XoxF‐type MDH [31].…”