Bipolaris spicifera : An unusual cause of non-healing cutaneous ulcers in a patient with diabetes and alcohol abuse

Sharma, Poonam; Gill, Parminder Kaur; Aggarwal, Aruna

doi:10.5799/ahinjs.02.2014.01.0121

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Later, based on spore morphology and sporulation studies, group I isolates were identified as B. sorokiniana isolates with olive green to brown oblong conidia with prominent scar at the base, having dimensions in the range of 60–120 μm × 15–20 μm and 3–9 septa ( Aggarwal et al, 2009 ; Acharya et al, 2011 ; Devi et al, 2021 ). Group II isolates were further subdivided into 2 groups: i) B. spicifera isolates which were substantially smaller, had less septation, and were considerably different from B. sorokiniana spores ( Kumar et al, 2002 ; Kachkouch et al, 2011 ; Qostal et al, 2019 ); and ii) E. rostratum isolates with long, thin spores with thick, dark-colored septa at both ends and were very different from the other 2 groups ( Ahmadpour et al, 2013 ; Bunkoed et al, 2014 ; Sharma et al, 2014 ; Hernández-Restrepo et al, 2018 ; Dhara et al, 2020 ). Further, molecular identification with ITS and GAPDH region sequencing revealed the presence of another pathogenic group, i.e.…”

Section: Discussionmentioning

confidence: 99%

Unraveling the dynamics of wheat leaf blight complex: isolation, characterization, and insights into pathogen population under Indian conditions

Aditya,

Aggarwal,

Bashyal

et al. 2024

Front. Microbiol.

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Wheat, a staple food crop for 35% of the global population, faces a threat from Helminthosporium leaf blight (HLB), a complex of spot blotch (Bipolaris sorokiniana) and tan spot (Pyrenophora-tritici-repentis) diseases under warm and humid conditions. However, in Indian conditions, the knowledge of existing pathogen populations associated with the HLB complex is limited and largely dominated by only B. sorokiniana (spot blotch). To address this, diseased samples were collected from all six wheat growing zones during 2020–2022. The pathogenic species were identified through in-depth morphological characterization, supplemented with ITS-rDNA and GAPDH sequence analysis, a diagnostic SCAR marker, and pathogenicity studies on two wheat varieties: Sonalika and HD2733. The 32 isolates collected from 10 different states consist of B. spicifera (12.5% of all isolates), Exserohilum rostratum (9.3%), Bipolaris oryzae (3.1%), and B. sorokiniana (75%). B. sorokiniana exhibited the highest disease severity on both varieties. Other lesser-known pathogenic species also produced comparable disease severity as B. sorokiniana isolates and, therefore are economically important. Unraveling pathogen composition and biology aids in disease control and resistance breeding. Our study highlights economically impactful and lesser-known pathogenic species causing wheat leaf blight/spot blotch in India, guiding both current management and future resistance breeding strategies in plant pathology.

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Section: Discussionmentioning

confidence: 99%

Unraveling the dynamics of wheat leaf blight complex: isolation, characterization, and insights into pathogen population under Indian conditions

Aditya,

Aggarwal,

Bashyal

et al. 2024

Front. Microbiol.

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“…(i) bacteria such as Achromobacter and Nectria in Nave high, Hirschia in Bulls wall, Aliihoeflea and Arenibacter in Bulls left, which may produce pigments [ 68 – 71 ], and (ii) Fungi e.g. Bipolaris, Xylodon and Itersonilia pointed in the Apse [ 22 ] and known for yellow–brown pigment production [ 72 ].…”

Section: Discussionmentioning

confidence: 99%

Dark-zone alterations expand throughout Paleolithic Lascaux Cave despite spatial heterogeneity of the cave microbiome

Bontemps

Prigent‐Combaret

Guillmot

et al. 2023

Environmental Microbiome

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Background Cave anthropization related to rock art tourism can lead to cave microbiota imbalance and microbial alterations threatening Paleolithic artwork, but the underpinning microbial changes are poorly understood. Caves can be microbiologically heterogeneous and certain rock wall alterations may develop in different rooms despite probable spatial heterogeneity of the cave microbiome, suggesting that a same surface alteration might involve a subset of cosmopolitan taxa widespread in each cave room. We tested this hypothesis in Lascaux, by comparing recent alterations (dark zones) and nearby unmarked surfaces in nine locations within the cave. Results Illumina MiSeq metabarcoding of unmarked surfaces confirmed microbiome heterogeneity of the cave. Against this background, the microbial communities of unmarked and altered surfaces differed at each location. The use of a decision matrix showed that microbiota changes in relation to dark zone formation could differ according to location, but dark zones from different locations displayed microbial similarities. Thus, dark zones harbor bacterial and fungal taxa that are cosmopolitan at the scale of Lascaux, as well as dark zone-specific taxa present (i) at all locations in the cave (i.e. the six bacterial genera Microbacterium, Actinophytocola, Lactobacillus, Bosea, Neochlamydia and Tsukamurella) or (ii) only at particular locations within Lascaux. Scanning electron microscopy observations and most qPCR data evidenced microbial proliferation in dark zones. Conclusion Findings point to the proliferation of different types of taxa in dark zones, i.e. Lascaux-cosmopolitan bacteria and fungi, dark zone-specific bacteria present at all locations, and dark zone-specific bacteria and fungi present at certain locations only. This probably explains why dark zones could form in various areas of the cave and suggests that the spread of these alterations might continue according to the area of distribution of key widespread taxa.

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Keratinophilic fungi from the vicinity of salt pan soils of Sambhar lake Rajasthan (India)

Deshmukh

Verekar²,

Chavan³

2018

Journal de Mycologie Médicale

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Bipolaris spicifera : An unusual cause of non-healing cutaneous ulcers in a patient with diabetes and alcohol abuse

Cited by 3 publications

References 11 publications

Unraveling the dynamics of wheat leaf blight complex: isolation, characterization, and insights into pathogen population under Indian conditions

Unraveling the dynamics of wheat leaf blight complex: isolation, characterization, and insights into pathogen population under Indian conditions

Dark-zone alterations expand throughout Paleolithic Lascaux Cave despite spatial heterogeneity of the cave microbiome

Keratinophilic fungi from the vicinity of salt pan soils of Sambhar lake Rajasthan (India)

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