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Exploration and Comparison of High-Throughput Sequencing Analysis of Endophytic Fungal Communities in Morinda tinctoria and Pithecellobium dulce

Michael Joe Xavier Sneha,Israel Mani,Myithili Thangavel,Senthuran Suresh Kumar,P. Rajapriya,Nagendraprabhu Ponnuraj,Mohan Pandi

Published 2025 in Microbiology Research

ABSTRACT

Fungal endophytes can be identified in a wide range of plant species which help to protect from both abiotic and biotic stressors. This research focused on using high-throughput sequencing (HTS) analysis to gain insight into the foliar endophytic fungal diversity between Morinda tinctoria and Pithecellobium dulce. The study obtained a total of 118,547 sequencing reads, which were grouped into 266 Operational Taxonomic Units (OTUs) with a 97% similarity threshold. M. tinctoria had more OTUs than P. dulce. Alpha diversity results show that both plant species support varied microbial communities with similar but distinct biodiversity profiles. The Shannon index revealed that M. tinctoria had considerably more fungal diversity than P. dulce. The correlation matrix and PCoA depicts the pairwise correlations between several soil metrics such as the total nitrogen level, entire phosphorus, overall potassium, and the electrical conductivity, total carbon from organic matter, pH levels, manganese, iron, zinc, copper, and boron. The OTUs were classified into 5 phyla, 18 classes, 40 orders, 70 families, and 36 genera, where the phylum Ascomycota has a relative abundance of (50–55%), followed by Basidiomycota at (55–60%). The most abundant genera were Wallemia (30–35%), Saitozyma (30–40%), and Talaromyces (20–25%), with average relative abundances. Unassigned genera show a significant proportion of fungal taxa that are still taxonomically unclear. A comparative analysis has been performed between the two plants, M. tinctoria has a higher fungal diversity, which is frequently associated with increased ecological stability, disease resistance, and better functional relationships with the host plant.

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