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Discovery of Five New Allographa Lichen Species in Western Ghats

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Scientists from the MACS Agharkar Research Institute (ARI), Pune have discovered five new species of lichen-forming fungi from the genus Allographa in the Western Ghats of India, a UNESCO World Heritage Site and a recognized biodiversity hotspot. These species are Allographa keralensis, Allographa nayakae, Allographa paraconsanguinea, Allographa persistinspersa, and Allographa semicarbonisata. The research combined traditional taxonomic methods with advanced molecular phylogenetic techniques, specifically multi-locus DNA sequencing using genetic markers mtSSU, nrLSU, and RPB2. This study represents the first comprehensive molecular phylogenetic investigation of Allographa species in the Western Ghats, providing valuable molecular reference data for future fungal biodiversity research in India.

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Key Facts

  • Discovery institution: MACS Agharkar Research Institute (ARI), Pune, an autonomous institute under the Department of Science and Technology.
  • New species discovered: Allographa keralensis (named after Kerala), Allographa nayakae (named in honor of Indian lichenologist Dr. Sanjeeva Nayaka), Allographa paraconsanguinea, Allographa persistinspersa, and Allographa semicarbonisata.
  • Location of discovery: Western Ghats, India, a UNESCO World Heritage Site and a biodiversity hotspot.
  • Research methods: Combination of traditional taxonomy and molecular phylogenetics using multi-locus DNA sequencing with three genetic markers — mitochondrial small subunit ribosomal RNA (mtSSU), nuclear large subunit ribosomal RNA (nrLSU), and RNA polymerase II subunit B (RPB2).
  • Significance: First molecular phylogenetic study of Allographa species from the Western Ghats, adding molecular reference sequences for the region's fungal biodiversity.
  • Publication: Research findings published in the journal Mycological Progress, which specializes in fungi and fungal taxonomy.

Background & Context

Allographa is a genus within lichen-forming fungi, which are symbiotic organisms composed of a fungal partner and a photosynthetic partner, usually an alga or cyanobacterium. Lichens hold ecological importance as bioindicators due to their sensitivity to air pollution and habitat changes. The Western Ghats is an ecologically significant region of India, known for its rich biodiversity and status as a protected UNESCO World Heritage Site. Prior to this research, molecular data for Allographa species in the Western Ghats was lacking, leaving a gap in understanding their taxonomy and evolutionary relationships.

Why This Matters for Exams / Exam Relevance

Students preparing for competitive exams in India, especially those covering environment, biodiversity, ecology, and science and technology, should note this discovery. Knowledge of India's biodiversity hotspots like the Western Ghats and recent scientific discoveries enhances one's understanding of current developments in taxonomy and biodiversity conservation. The application of molecular techniques such as multi-locus DNA sequencing underscores modern approaches in biological research, highlighting the integration of classical taxonomy with advanced genetic analysis.

Points to Remember

  • Five new Allographa lichen species identified in the Western Ghats by scientists at ARI Pune.
  • Allographa keralensis is named after the state Kerala; Allographa nayakae honors Dr. Sanjeeva Nayaka.
  • Molecular phylogenetic methods used include sequencing three genetic markers: mtSSU, nrLSU, and RPB2.
  • The Western Ghats is a UNESCO World Heritage Site and an important biodiversity hotspot.
  • Lichens serve as bioindicators, reflecting environmental health due to their sensitivity to pollution and habitat disturbance.
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