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Search for "sridhar k.": 6 articles found.
GHATE S.D., SRIDHAR K.R. (2016): Aquatic hyphomycetes associated with leaves, leaf detritus and crown humus in palm canopies. [Caryota urens, Cocos nucifera, hyphomycetes diversity, abiotic factors, dry and wet season, India] Czech Mycology 68(2): 111-126 (published: 8th July, 2016)
abstract
Aquatic hyphomycetes associated with attached dead leaves (autochthonous), accumulated leaf litter (allochthonous) and crown humus in canopies of wild palm (Caryota urens) and cultivated palm (Cocos nucifera) were assessed during wet and dry seasons by means of bubble chamber incubation.The canopy of C. urens trapped allochthonous leaf litter of seven tree species (Alstonia scholaris, Artocarpus hirsutus, Ficus benghalensis, F. religiosa, Garcinia indica, Holigarna arnottiana and Mangifera indica), while in the canopies of C. nucifera leaf litter of four tree species was found (Acacia mangium, Delonix regia, Eucalyptus tereticornis and Polyalthia longifolia). Although the total number of species of aquatic hyphomycetes was almost identical during the dry season (17-18 spp.), in the wet season it was higher in Caryota urens than in Cocos nucifera (31 vs. 23 spp.). Based on conidium production, Anguillospora crassa, Flagellospora curvula and Lunulospora curvula were among the top five species during the wet and dry seasons in both palms.Shannon diversity was higher in the wet season than in the dry season in all samples of C. urens, while it was higher only in leaf samples of C. nucifera. Sřrensen’s similarity of aquatic hyphomycete communities between the samples was higher in C. urens than in C. nucifera. Three-way ANOVA revealed significant differences in species richness and conidium production between the seasons, palms and substrate assessed.
GHATE S.D., SRIDHAR K.R. (2015): Rain-borne fungi in stemflow and throughfall of six tropical palm species. [Canopy, hyphomycetes, conidia, species richness, diversity, abiotic factors] Czech Mycology 67(1): 45-58 (published: 29th May, 2015)
abstract
The present survey documents rain-borne hyphomycetes in stemflow and throughfall of six palm species on the west coast of India during the monsoon season. A total of 61 species were recovered.Irrespective of the palms, throughfall was represented by a higher number of species than stemflow.Pearson correlation was significant and positive between richness of species and conidia with air humidity, air temperature, water temperature and water conductivity. Except for Areca, Shannon diversity was higher in throughfall compared to stemflow. Jaccard’s percent similarity of species in stemflow was lowest between Cocos vs. Roystonea (16%) and highest between Borassus vs. Caryota (55.5%), while in throughfall it was lowest between Areca vs. Livistona (16.7%) and highest between Caryota vs. Cocos and Livistona vs. Cocos (50%).Two-way ANOVA revealed that the richness of species and that of conidia were significantly more dependent on palm species than stemflow or throughfall. The number of rain-borne fungi in palm species exceeded that in the nearby coastal stream with an overlap of about 40%.
KARUN N.C., SRIDHAR K.R. (2013): Occurrence and distribution of Termitomyces (Basidiomycota, Agaricales) in the Western Ghats and on the west coast of India. [Termitomyces, Western Ghats, distribution, traditional knowledge, tribal food security] Czech Mycology 65(2): 233-254 (published: 20th December, 2013)
abstract
This study documents five species of Termitomyces distributed in the forests, plantations and grasslands of the Western Ghats and west coast of India. Occurrence and distribution of Termitomyces have been assessed based on literature and the present survey. Descriptions of recorded Termitomyces species are given along with diagnostic features for identification. Traditional knowledge of Termitomyces has been documented based on the experience of a tribal sect and the local population.As termitomycetes are largely uncultivable, strategies are recommended for conservation of their habitat and sustainable harvesting of this human nutritional source as an alternative to plant- and animalderived foods.
RAVIKUMAR M., SRIDHAR K.R., SIVAKUMAR T., KARAMCHAND K.S., SIVAKUMAR N., VELLAIYAN R. (2009): Diversity of filamentous fungi on coastal woody debris after tsunami on the southeast coast of India. [tsunami, Bay of Bengal, southeast coast of India, woody litter, fungal diversity] Czech Mycology 61(1): 107-115 (published: 29th September, 2009)
abstract
Five coastal locations on the southeast coast of India severely disturbed after the tsunami on December 26, 2004 were surveyed for the occurrence of filamentous fungi on woody debris by means of short-term (1 month) and long-term (12 months) damp incubation. Short-term incubation revealed 26 mitosporic fungi (8 genera) ranging from 14 to 17 taxa per location with a total frequency of occurrence between 0.4 and 5.6 %. Aspergillus taxa were dominant and six of them were common to all locations.Long-term incubation yielded 35 fungi (25 genera) (22 ascomycetes, 1 basidiomycete and 12 mitosporic fungi). The total fungal taxa per location ranged from 25 to 28 with a total frequency of occurrence of 0.8 to 46.8 %. Corollospora gracilis was the most dominant ascomycete (46.8 %), while Cirrenalia tropicalis and Dictyosporium pelagicum dominated among mitosporic fungi (18 %). The total frequency of occurrence of 11 ascomycetes and four mitosporic fungi was above 10 %. Twelve ascomycetes and two mitosporic fungi were common to all locations. The richness of fungi was higher after long-term than short-term incubation. The occurrence of 61 fungal taxa in this study suggests that the tsunami-dumped woody litter on the southeast coast of India might have at least partially originated from the ocean, thus representing a mosaic of fungi existing in seawater and sediments.
KARAMCHAND K.S., SRIDHAR K.R. (2008): Water-borne conidial fungi inhabiting tree holes of the west coast and Western Ghats of India. [tree holes, canopy, leaf litter, water-borne fungi, conidia, diversity] Czech Mycology 60(1): 63-74 (published: 4th July, 2008)
abstract
The present study focuses on water-borne conidial fungi associated with leaf litter in riparian tree holes of the west coast (Konaje) and Western Ghats (Sampaje) of India during dry (summer) and wet (monsoon) seasons. Out of a total of 34 fungal taxa recovered from leaf litter trapped in tree holes, 26 fully identified taxa constitute the first record for the tree hole habitat. Paired t-test revealed no significant difference in number of taxa (P = 0.1177) and conidial output (P = 0.1816) between Konaje and Sampaje tree holes, while they significantly differed between seasons of Konaje (P = 0.0258) and Sampaje (P = 0.0206). The Simpson and Shannon diversity of fungi were highest in Sampaje than Konaje tree holes. Tree-wise diversity of fungi revealed that banyan (Ficus benghalensis) tree holes are highly diverse during the summer and monsoon seasons in Konaje, but only during summer in Sampaje. In spite of a low conidial output, tree hole leaf litter of Konaje yielded 18 taxa against 20 taxa in the Konaje stream, wheras 29 taxa were recorded in Sampaje tree holes against 68 taxa in the Sampaje stream. The current study has been compared with earlier investigations on the occurrence of water-borne conidial fungi in tree canopies (e. g. intact leaves, leaf litter, tree holes, stemflow and throughfall).
MARIA G.L., SRIDHAR K.R. (2003): Endophytic fungal assemblage of two halophytes from west coast mangrove habitats, India. [mangroves, halophytes, endophytes, fungi, India] Czech Mycology 55(3-4): 241-251 (published: 22nd December, 2003)
abstract
Twenty-five endophytic fungi comprising three ascomycetes, 20 mitosporic fungi and two sterile fungi were recovered from two halophytes (Acanthus ilicifolius and Acrostichum aureum) of a west coast mangrove habitat in India. Overall colonisation of tissue segments by endophytes ranged between 74.5 % (Acanthus ilicifolius) and 77.5 % (Acrostichum aureum). Analysis using the Jaccard’s similarity coefficient revealed 16-25 % similarity in endophyte assemblage among different tissues, and 24.5 % between the two hosts. Out of four tissues screened, species richness and diversity were high in stems of Acanthus ilicifolius and roots of Acrostichum aureum. The most dominant endophyte was Colletotrichum sp. in prop roots of Acanthus ilicifolius, and Yeast sp. 1 in rhizomes of Acrostichum aureum. Among the dominant endophytes (colonisation frequency >5 %), Acremonium and Yeast sp. 1 were common to both hosts. Acanthus ilicifolius showed dominance of a single species, (Colletotrichum sp.), while in Acrostichum aureum multiple species dominance was seen (Acremonium sp., Pénicillium sp. and Yeast sp. 1). Only one typical marine mitosporic fungus (Cumulospora marina) was recovered from the roots of Acanthus ilicifolius.
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