Root Rot Pathogen Soil Ecology Research

Rhizosphere Microbial Community Profiling

Interns will conduct molecular analysis of soil microbial communities in rhizosphere regions affected by root rot pathogens using 16S rRNA sequencing and metagenomic approaches. They will identify key microbial taxa, analyze community structure changes, and correlate findings with disease severity and soil suppressiveness.

Pathogen Survival and Propagule Dynamics in Soil

Interns will investigate survival mechanisms of root rot pathogens (Fusarium, Pythium, Phytophthora species) in soil under various environmental conditions. They will quantify pathogen propagule density, assess dormancy periods, and evaluate factors influencing spore germination and viability using culture-dependent and molecular techniques.

Soil Suppressiveness Bioassay Development and Validation

Interns will design and standardize bioassay protocols to evaluate soil suppressiveness against root rot pathogens using controlled greenhouse experiments. They will test different soil amendments, microbial inoculants, and organic materials to identify biological and chemical factors contributing to disease suppression.

Organic Matter Decomposition and Pathogen Ecology

Interns will study how plant residue quality, decomposition rates, and carbon dynamics influence root rot pathogen populations and activity in soil ecosystems. They will conduct incubation studies tracking organic matter degradation alongside pathogen population fluctuations under different moisture and temperature regimes.

Root Exudate Chemistry and Pathogen Chemotaxis

Interns will analyze root exudate composition from susceptible and resistant plant varieties using chromatography and mass spectrometry techniques. They will conduct laboratory assays examining how specific exudate compounds attract or repel root rot pathogens and influence pathogen colonization patterns in the rhizosphere.