Delineation of molecular interactions of plant growth promoting bacteria induced β-1,3-glucanases and guanosine triphosphate ligand for antifungal response in rice: a molecular dynamics approach

Abstract

Background The plant growth is influenced by multiple interactions with biotic (microbial) and abiotic components in their surroundings. These microbial interactions have both positive and negative effects on plant. Plant growth promoting bacterial (PGPR) interaction could result in positive growth under normal as well as in stress conditions. Methods Here, we have screened two PGPR’s and determined their potential in induction of specific gene in host plant to overcome the adverse effect of biotic stress caused by Magnaporthe grisea, a fungal pathogen that cause blast in rice. We demonstrated the glucanase protein mode of action by performing comparative modeling and molecular docking of guanosine triphosphate (GTP) ligand with the protein. Besides, molecular dynamic simulations have been performed to understand the behavior of the glucanase-GTP complex. Results The results clearly showed that selected PGPR was better able to induce modification in host plant at morphological, biochemical, physiological and molecular level by activating the expression of β-1,3-glucanases gene in infected host plant. The docking results indicated that Tyr75, Arg256, Gly258, and Ser223 of glucanase formed four crucial hydrogen bonds with the GTP, while, only Val220 found to form hydrophobic contact with ligand. Conclusions The PGPR able to induce β-1,3-glucanases gene in host plant upon pathogenic interaction and β-1,3-glucanases form complex with GTP by hydrophilic interaction for induction of defense cascade for acquiring resistance against Magnaporthe grisea. Graphical abstract

The role of endophyte M7SB41 ( Seimatosporium sp.) from wild Rosa in enhancing host plant’s powdery mildew resistance

“…Similarly, Cao et al (2009) found that endophytes Choiromyces aboriginum produced higher activities of β-1, 3-glucanases which allowed them to bore holes into soilborne plant pathogens. A recent study showed that the released β-1, 3-glucan like oligosaccharides can act as an elicitor, which induce the signaling cascades for the activation of systemic and localized defense responses against the wide range of phytopathogens (Jha et al, 2022). Therefore, these results indicated that the change of β-1, 3-glucanase activities may be one of the mechanisms underlying endophyte M7SB 41 protection host plants against PM infection.…”

Wild Rosa Endophyte M7SB41-Mediated Host Plant’s Powdery Mildew Resistance

“…Similarly, Cao et al [ 41 ] found that endophytes Choiromyces aboriginum produced higher activities of β-1, 3-glucanases which allowed them to bore holes into soilborne plant pathogens. A recent study showed that β-1, 3-glucanases safeguard the plants from fungal pathogens via oligosaccharide elicitor formation, which induces the signaling cascades for the activation of systemic and localized defense responses [ 42 ]. Therefore, these findings indicated that the change of β-1, 3-glucanase activities may be one of the mechanisms underlying endophyte M7SB41 protection of host plants against PM infection.…”

Editorial: Structural bioinformatics and biophysical approaches for understanding the plant responses to biotic and abiotic stresses

“…However, the underlying structural and functional relationships of these molecular mechanisms require more research. Computational and biophysical approaches are viable options for analyses of target molecules to understand their interactions and dynamics that initiate biochemical and physiological responses of plants (Wan et al, 2015;Konda et al, 2018;Moffett and Shukla, 2018;Rayevsky et al, 2019;Jha et al, 2022). These responses in turn control plant tolerance and resistance to sub-optimal environmental conditions.…”