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Scanning Electron Microscopy (SEM) Protocols for Problematic Plant, Oomycete, and Fungal Samples

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Sporocadaceae revisited.

P Razaghi¹, M Raza^1,2, S L Han^1,3

¹State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.

Studies in Mycology

|December 24, 2024

Summary

This study revises the fungal family Sporocadaceae, introducing a new genus and 43 new species. It clarifies species boundaries and establishes a foundation for future research on fungal diversity and evolution.

Keywords:

Fungal diversity Neopestalotiopsis Pestalotiopsis new taxa plant pathogens taxonomy

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Area of Science:

Mycology
Fungal Taxonomy
Plant Pathology

Background:

The fungal family Sporocadaceae is diverse, encompassing plant pathogens, endophytes, saprobes, and animal/human parasites.
Previous taxonomic revisions used a polyphasic approach, but significant gaps in species diversity and host associations remain.
Commonly used genetic markers offer limited resolution for species delimitation within Sporocadaceae, particularly for the genera Neopestalotiopsis and Pestalotiopsis.

Purpose of the Study:

To investigate the diversity and host associations of the fungal family Sporocadaceae.
To revise the taxonomy of Sporocadaceae using morphological and multi-locus phylogenetic analyses.
To establish a phylogenomic project to improve species delimitation and facilitate evolutionary and metabolite research.

Main Methods:

Morphological comparisons of 488 fungal strains.
Multi-locus phylogenetic analyses using LSU, ITS, tef-1α, tub2, and rpb2 gene sequences.
Phylogenomic analysis initiated to address limitations of traditional markers.

Main Results:

Identification of 86 species within Sporocadaceae, including one new genus (Cavernicola) and seven known genera.
Description of 43 new species and three new combinations.
Correction of seven problematic type sequences and synonymization of three species.
Pestalotiopsis and Neopestalotiopsis identified as the most prevalent genera, associated with numerous plant species.

Conclusions:

The study significantly expands the known diversity of Sporocadaceae, providing a revised taxonomic framework.
The findings highlight the need for advanced methods like phylogenomics for accurate species delimitation in this family.
This research provides a crucial foundation for understanding Sporocadaceae evolution, host interactions, and potential applications.