Unlocking Grass Stress Resistance: Fungal Endophyte-Mediated Pathogen Recognition and RNA Regulation

Area of Science:

• Plant-microbe interactions
• Molecular plant pathology
• Agricultural biotechnology

Background:

• Fungal endophytes form symbiotic relationships within plant tissues, offering enhanced stress tolerance, particularly in grasses.
• These microorganisms influence host-pathogen interactions and plant responses to environmental challenges like drought and salinity.

Purpose of the Study:

• To review the molecular mechanisms by which fungal endophytes mediate stress tolerance in plants, focusing on host-pathogen interactions.
• To explore the role of endophytes in immune priming, systemic acquired resistance (SAR), and regulation of non-coding RNAs.
• To highlight the contribution of multi-omics techniques in understanding these symbiotic associations.

Main Methods:

• Review of existing literature on fungal endophyte-plant interactions and stress tolerance mechanisms.
• Analysis of molecular pathways including pathogen-associated molecular patterns (PAMPs), damage-associated molecular patterns (DAMPs), and effector proteins.
• Integration of multi-omics data (genomics, transcriptomics, proteomics, metabolomics, fluxomics) to elucidate genetic and metabolic regulation.

Main Results:

• Endophyte colonization primes plant immunity by modulating PAMPs, DAMPs, and effectors, enhancing resistance to pathogens.
• Endophytes regulate osmotic adjustment, reactive oxygen species (ROS) detoxification, and secondary metabolite production for abiotic stress tolerance.
• Multi-omics approaches reveal insights into genetic and metabolic pathways, with AI assisting in identifying regulatory networks.

Conclusions:

• Fungal endophytes bolster grass stress resilience through coordinated pathogen recognition, RNA regulation, and metabolic reprogramming.
• AI-driven multi-omics show promise for identifying regulatory networks, but empirical validation in grass-endophyte systems is needed.
• Further research integrating functional genomics and field validation is crucial for agricultural applications of endophyte-based strategies.