Browsing by Author "Shambhu Kumar"

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A new species of Parapyricularia from India and a key to all species
(2013) Raghvendra Singh; Shambhu Kumar; Archana Singh; Kalawati Shukla
Parapyricularia indica, sp. nov., on living leaves of Gongronema hemsleyanum (Asclepiadaceae) in subtropical forests of Uttar Pradesh, India, is described, illustrated and compared with other species of Parapyricularia. A key to species of Parapyricularia is provided. Description and nomenclatural details were deposited in MvcoBank.
A new species of Pseudocercosporella on Andrographis paniculata from Central India
(Verlag Ferdinand Berger und Sohne GmbH, 2016) Neha Awasthi; Raghvendra Singh; Shambhu Kumar
Pseudocercosporella andrographidis, a new foliicolous mucedinaceous hyphomycetous fungus (Mycosphaerellaceae) discovered on living leaves of Andrographis paniculata (Acanthaceae), is described and illustrated. The new species, which is the first Pseudocercosporella species on a host of the Acanthaceae, is compared with other species of the Mycosphaerellaceae described on Andrographis spp.
A new species of Zasmidium (Mycosphaerellaceae) from India
(Verlag Ferdinand Berger und Sohne GmbH, 2014) Archana Singh; Ravindra N. Kharwar; Raghvendra Singh; Shambhu Kumar
A new species ot Zasmidium smilacis-proliferae on living leaves ot Smilax prolifera (Smilacaceae), from the Chawk forest in the Tarai Region of Uttar Pradesh, India is described, illustrated and compared with other Zasmidium species on Smilax.
Cercosporella bundelkhandae comb. nov. From India
(Mycotaxon Ltd, 2020) Raghvendra Singh; Sanjeet Kumar Verma; Sanjay Yadav; Shambhu Kumar
The new combination Cercosporella bundelkhandae ( Pseudocercosporella bundelkhandae) is proposed, based on critical morphological re-examination of the holotype specimen and fresh topotypic material and comparison with closely related species of cercosporoid hyphomycetes. The species was originally collected on living leaves of Tinospora sinensis from Jhansi, Utttar Pradesh, India. © 2020 Mycotaxon Ltd. All rights reserved.
Corynespora titarpaniensis sp. nov., on Lepidagathis from Central India
(Mycotaxon Ltd, 2017) Prakash Kushwaha; Raghvendra Singh; Shambhu Kumar
A new asexual fungus Corynespora titarpaniensis, discovered on Lepidagathis sp. (Acanthaceae) from Madhya Pradesh, India, is described, illustrated, and compared with closely similar species.
Global diversity and distribution of distoseptosporic micromycete corynespora güssow (Corynesporascaceae): An updated checklist with current status
(MRF, 2021) Shambhu Kumar; R. Singh; Kamal
A review and updated checklist of Corynespora (Dematiaceous hyphomycetes) diversity and distribution reported from all over the world is prepared and presented over here based on available bibliographic survey upon published data. After critical review and verification, a total of 207 taxonomic records of Corynespora has been found in Index Fungorum, among them 179 spp. (86.47%) have been found as nomenclaurally valid/accepted taxa, while 14 spp. (6.76%) found to be transferred to other different taxa, 11 spp. (5.31%) synonymously transferred to other Corynespora taxa, and 3 spp. (1.44%) found as invalid taxa. In all word-wide recorded Corynespora species, 114 spp. (55.07%) have been found as foliicolous, 90 spp. (43.47%) as lignicolous, 2 spp. (0.96%) as lichenicolous, and 1 sp. (0.48%) from the air. Similarly, 184 spp. (88.88%) have been reported on Angiosperms, 1 sp. (0.48%) on Gymnosperms, 22 spp. (10.62%) recorded on unidentified plant parts/taxa, whereas no one species recorded on Bryophytes and Pteridophytes. Likewise, 166 spp. (80.19%) have been recorded on 54 families of Dicot, 18 spp. (8.69%) on 6 families of monocot, 1 sp. (0.48%) on 1 family of Gymnosperm, and 22 spp. (10.62%) on unidentified plant parts/taxa. Furthermore, the distribution of Corynespora spp. have been recorded from 34 countries, in which the species richness recorded maximum in India (80 spp., 38.64%) followed by China (31 spp., 14.97%), USA (11 spp., 5.31%), and other countries. Besides, distinguishing features of valid Corynespora spp. are also provided along with their hosts/substrate, host’s family, distribution (country), and references. This paper provides an updated checklist of Corynespora spp. reported from all over the world with their current status in the context of current nomenclature. In order to get all collected scientific information at one shop for further scientific study on exploration of Corynespora, this compiled up-to-date checklist with their comparative morphology would be vital and helpful to the researchers of concern fields as well as allied disciplines. © 2021, MRF. All rights reserved.
Morpho-cultural and molecular phylogenetic characterisation of Curvularia verruculosa causing leaf spot and blight disease on Strychnos potatorum – A new record from India
(Academic Press, 2024) T.S. Kripa; Shambhu Kumar; K.T. Mufeeda; Jain Mary Jose; S. Mahadevakumar; Raghvendra Singh
Strychnos potatorum L.f., is a well-known medicinal plant found in peninsular India and Sri Lanka, which is widely used in traditional and modern medicines for curing various kinds of diseases. In January 2020, while conducting a foliar fungal disease investigation in Kerala, India, a leaf spot and blight disease was spotted on S. potatorum. The pathogen was isolated and identified as Curvularia verruculosa based on symptomatic studies, culture characteristics, conidial morphology, multigene (ITS-LSU-GAPDH-TEF1-α) molecular sequences analysis, and concatenate multigene (ITS-GAPDH-TEF1-α) phylogeny. Koch's postulates were evaluated in vitro, and similar symptoms and re-isolation of the pathogen confirmed the association of C. verruculosa with leaf spot and blight disease. To our knowledge, this is the first report of C. verruculosa causing foliar disease on S. potatorum in India. © 2023 Elsevier Ltd
Morphological and molecular characterization of Lasiodiplodia theobromae associated with leaf spot and blight disease of Coscinium fenestratum (Gaertn.) Colebr.-a new host record from India
(Oxford University Press, 2023) Jain Mary Jose; Shambhu Kumar; Merin Johnson; K.T. Mufeeda; T.S. Kripa; S. Mahadevakumar; Raghvendra Singh
Coscinium fenestratum is a medicinally significant critically endangered plant found in Western Ghats of India. The leaf spot and blight was observed in Kerala during 2021 with disease incidence of 40% in 20 assessed plants in 0.6 hectare. The associated funguswas isolated on potato dextrose agar medium. A total of six morpho-culturally identical isolates were isolated and morphologically identified. Based on morpho-cultural features, the fungus was identified at genus level as Lasiodiplodia sp., which was further authentically confirmed as Lasiodiplodia theobromae by molecular identification with a representative isolate (KFRIMCC 089) using multigene (ITS, LSU, SSU, TEF1-α, and TUB2) sequence analysis and concatenated phylogenetic analysis (ITS-TEF1-α-TUB2). Pathogenicity tests were also assessed in vitro and in vivo using mycelial disc and spore suspension of L.Theobromae, and the isolated fungus's pathogenic behaviour was confirmed after re-isolation and morpho-cultural features. Literature survey reveals that there are no reports of L.Theobromae on C. fenestratum from all over the world. Hence, C. fenestratum is being firstly reported as a new host record for L.Theobromae from India. © 2023 Blackwell Publishing Ltd. All rights reserved.
Morphology and phylogeny of a new species, Pseudocercospora haldinae (Mycosphaerellaceae) on Haldina cordifolia from India
(Magnolia Press, 2021) Sanjay Yadav; Sanjeet Kumar Verma; Vinay Kumar Singh; Raghvendra Singh; Archana Singh; Shambhu Kumar
Pseudocercospora haldinae, a new anamorphic foliicolous hyphomycetous fungus discovered on living leaves of Haldina cordifolia (Rubiaceae) is taxonomically described and illustrated. This species is compared with closely related species of Pseudocercospora and other dematiaceous cercosporoid forms reported on the same host genus. The phylogeny of this species has been inferred from partial nuclear ribosomal 28S large subunit (LSU) and complete internal transcribed spacer (ITS) rDNA sequence data. On the basis of LSU, P. haldinae represents characteristic features of Pseudocercospora s. str. and did not form red crystals when cultivated on agar media. © 2021 Magnolia Press. © 2021 Magnolia Press. All rights reserved.
Neokamalomyces indicus gen. nov., sp. nov. (Mycosphaerellaceae)—a Septoria-like genus from India
(Magnolia Press, 2022) Sanjay Yadav; Sanjeet Kumar Verma; Raghvendra Singh; Vinay Kumar Singh; Balmukund Chaurasia; Paras Nath Singh; Shambhu Kumar
A new hyaline coelomycetous fungus discovered on living leaves of Ficus benghalensis (Moraceae) is described and illustrated. Morphologically, it is similar to Septoria or septoria-like genus, but based on cultural characteristics and multigene (LSU-RPB2-ITS) phylogenetic analysis this strain represents an additional lineage in Mycosphaerellaceae. Hence, a new genus and species, Neokamalomyces indicus is proposed. Copyright © 2022 Magnolia Press.
Passalora caesalpiniicola sp. nov. from India on Caesalpinia bonduc
(Mycotaxon Ltd, 2016) Shambhu Kumar; Raghvendra Singh
Passalora caesalpiniicola on Caesalpinia bonduc (Leguminosae, Caesalpinioideae) is described and illustrated as a new species. It differs in several characters from the only other Passalora sp. recorded on Caesalpinia and can be differentiated from morphologically similar Passalora spp. on caesalpinioid hosts. © 2016. Mycotaxon, Ltd.
Passalora golaghati comb. nov. from India
(Mycotaxon Ltd, 2022) Gargee Singh; Sanjay Yadav; Raghvendra Singh; Shambhu Kumar
The hyphomycete Cercospora golaghati is recombined as Passalora golaghati based on critical re-examinations of original type material and a fresh topotypic collection and comparison with closely related species of cercosporoid taxa. © 2022 Mycotaxon Ltd. All rights reserved.
Phyllactinia braunii sp. nov. (Erysiphales) on Cordia myxa from Central India
(Magnolia Press, 2017) Prakash Kushwaha; Raghvendra Singh; Balmukund Chaurasia; Shambhu Kumar
Phyllactinia braunii sp. nov., discovered on living leaves of Cordia myxa (Boraginaceae) in a dry deciduous forest of Central India, is described and illustrated. It is compared with P. thirumalachari and its anamorph-typified synonym Ovulariopsis cordiae, a morphologically similar species known from India and Taiwan on Cordia dichotoma. © 2017 Magnolia Press.
Pseudodeightoniella indica gen. and sp. nov., a hyphomycete from India
(Mycotaxon Ltd, 2021) Sanjeet Kumar Verma; Sanjay Yadav; Raghvendra Singh; Balmukund Chaurasia; Shambhu Kumar
An interesting new mitosporic foliicolous genus and species, Pseudodeightoniella indica, discovered on living leaves of Medicago polymorpha (Fabaceae) from Uttarakhand, India, is described and illustrated. Morphologically, Pseudodeightoniella differs from the closely similar Deightoniella and Neodeightoniella in producing well-developed erumpent stromata, highly undulate to spiral or helicoid and densely fasciculate conidiophores with enlarged basal cells, and conidia lacking mucoid caps. Recently published illustrations of conidia and conidiophores characterizing the Deightoniella and Neodeightoniella type species are also provided. © Mycotaxon, Ltd. 2021.
Two new species of Zasmidium from Nepal
(Mycotaxon Ltd, 2015) Ravindra Nath Kharwar; Archana Singh; Raghvendra Singh; Shambhu Kumar
Zasmidium cassines on living leaves of Cassine glauca (Celastraceae) and Z. fabaceicola on living leaves of Vigna unguiculata (Fabaceae) are described and illustrated from a forest in the terai region of Nepal. The two new foliar fungi are compared with closely related taxa. © 2015. Mycotaxon, Ltd.
Two new species of Zasmidium from northeastern Uttar Pradesh, India
(2014) Raghvendra Singh; Archana Singh; Shambhu Kumar; Parmatma Prasad Upadhyaya; Rafael F. Castañeda Ruíz
During surveys of anamorphic fungi, two undescribed taxa of Zasmidium were discovered, Z. dioscorinum sp. nov. on Dioscorea oppositifolia (Dioscoreaceae) and Z. robustum sp. nov. on living leaves of Prunus sp. (Rosaceae), in subtropical forests of northeastern Uttar Pradesh, India. These two species differ from similar species morphologically. These species are described, illustrated and compared with closely related taxa. © 2013 J. Cramer in Gebr. Borntraeger Verlagsbuchhandlung, Stuttgart, Germany.