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First Report of Foliicolous Lichen Biota in South Karnataka-India

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First Report of Foliicolous Lichen Biota in South Karnataka-India Int.J.Curr.Microbiol.App.Sci (2015) 4(6): 250-256 ISSN: 2319-7706 Volume 4 Number 6 (2015) pp. 250-256 http://www.ijcmas.com Original Research Article First Report of Foliicolous Lichen Biota in South Karnataka-India S. Rashmi1 and H.G. Rajkumar1,2* 1Department of studies in Botany, Manasagangotri, University of Mysore, Mysore 570 006, Karnataka, India 2Department of Plant Pathology, University of Georgia, Athens, Georgia GA 30602, USA *Corresponding author A B S T R A C T Lichens that colonize on live leaves are called foliicolous lichens. India has a rich collection of foliicolous lichens with 116 species from Andaman and Nicobar Islands, Palni and Nilgiri Hills and Northeast India. Whereas, foliicolous lichens in K e y w o r d s Karnataka is not reported. In the present study 18 species, belonging to 16 genera and 12 families are recorded. Family Gomphillaceae dominated with 4 species Foliicolous, Aulaxina quadrangular, Echinoplaca epiphylla, Tricharia allostrigasa and Karnataka, Tricharia triseptate. Sporopodium xantholeucum (Mull. Arg.) Zahlbr and Strigula Kodagu, subelegans Vainio are universally distributed in all reported regions in India. These Western Ghats findings will lead to further research on foliicolous lichens and provide a better understanding of their distribution within the Southern Karnataka region. This is the first detailed report on foliicolous lichens and their distribution in South Karnataka. Introduction species of foliicolous lichens have been Lichens are fungi that live with symbiotic reported so far from the world (Lücking et association of algae or cyanobacteria. al., 2000), of which 116 species are reported Lichens that colonize on live leaves are from India (Pinokiyo and Singh, 2004). called foliicolous lichens. These leaf- Though the maximum diversity of lichens in inhabiting lichens are widely distributed in India is recorded from the South Indian wet or moist, highly humid (60 to 90%) or regions, the Eastern and Western Himalayas foggy tropical and subtropical forests (Awasthi, 2000), they are unexplored in throughout the world. They occur only on southern Karnataka of India. Karnataka is ephemeral substrate, i.e. surface of leaves the seventh largest state situated on a with a relatively short lifespan of 1-3 years, tableland where the Western and Eastern corresponding to the longevity of their Ghats ranges converge into the complex, in phorophyte leaves (Lücking, 1998). These the western part of the Deccan Peninsular lichens have an accelerated life cycle and region of India. About 38,724 km2 respond rapidly to changes in environmental (14,951 sq mi) of Karnataka (i.e. 20% of the conditions (Lücking, 1997). About 716 250 Int.J.Curr.Microbiol.App.Sci (2015) 4(6): 250-256 state's geographic area) is covered by measured. The measurements of the thallus, forests. Karnataka is rich in diverse lichen medulla, epithecium, and hymenium were flora with 336 species (Singh and Sinha, generally taken in the sections mounted in 2010), reported from Western Ghats cotton blue. The thallus size was measured (Nayaka and Upreti, 2005) and central in centimeter, lobe size and ascocarps in Karnataka (Nayaka and Upreti, 2002; millimeter and thallus medulla, epithecium, Shravanakumara et al., 2010; Vinayaka and hymenium thickness, asci and ascospores Krishnamurthy, 2010; Vinayaka et al., 2010; size in milimicron. Chemistry of the 2012). Follicolous lichens in Karnataka are specimens was done by spot tests and Thin no where reported, hence this would be the Layer Chromatography (TLC). first report on the diversity of leaf- Identification was done using relevant keys colonizing lichens in Southern part of (Lücking and Cáceres, 2002; Awasthi, Karnataka. 1991). Materials and Methods Results and Discussion Collection of lichens A total of 18 foliicolous lichens have been recorded, belonging to 16 genera and 12 Lichen specimens found to be grown on families (Table 1). Of which 13 species are leaves were collected from Kodagu district, reported to be new to Karnataka. The region which lies in the southern part of Karnataka. is dominated by crustose growth form with Kodagu is one of the micro hotspot 15 species and foliose growth form with 3 biodiversity within the larger hotspots of the species (Fig 1). Family Gomphillaceae Western Ghats, which occupy an area of dominated with 4 species Aulaxina 4108 sq.km. Kodagu has approximately 65 quadrangular (Stirton) R. Sant., per cent of its geographical area under tree Echinoplaca epiphylla Fèe., Tricharia cover, making it one of the most densely allostrigasa R. Sant. and Tricharia forested districts in the country ranging from triseptate R. Sant. Foliose lichens like dry to moist deciduous and evergreen Dirinaria confluens (Fr.) D.D.Awasthi., forests. Phorophytes were collected and Heterodermia comosa (Eschw.) Follmann & deposited in the herbarium of Department of Redón and Heterodermia obscurata (Nyl.) studies in Botany, Manasagangotri, Trevisan were also found to be grown on University of Mysore, Karnataka, India. leaves. Family Echtolechiaceae with 2 species Calopadia phyllogena (Müll.Arg.) Identification of lichens V zda and Sporopodium xantholeucum (Müll. Arg.) Zahlbr. and the rest with one The external morphology was studied under species each were recorded (Fig. 2). Lichen dissecting binocular microscope. The taxa namely Aulaxina quadrangular Stirton) anatomy of the thallus and apothecia were R. Sant., Bacidia apiahica (Müll.Arg.) studied under a compound microscope. The Zahlbr, Byssoloma subdiscordans (Nyl.) P. section of dry material was taken with the James, Calopadia phyllogena (Müll.Arg.) help of a safety razor blade and mounted in V zda, Cryptothecia candida (Kremp.) R. water or in cotton blue in lactophenol. The Sant., Dimerella dilucida (Krumpelh.) R. colour of medulla, epithecium, hypothecium Sant., Echinoplaca epiphylla Fèe., and ascus were recorded. The shape and size Flavobathelium epiphyllum Lücking, of the asci, ascospores and conidia were Aptroot & G.Thor, Graphis foliica var. 251 Int.J.Curr.Microbiol.App.Sci (2015) 4(6): 250-256 major Awasthi & Singh, Sporopodium Sant. and Tricharia triseptate R. Sant is xantholeucum (Müll. Arg.) Zahlbr., Strigula reported to be new to Karnataka (Fig. 3). subelegans Vainio, Tricharia allostrigasa R. Table.1 List of foliicolous lichens in South Karnataka-India Sl.no. Lichen species Family Growth form 1 Aulaxina quadrangular (Stirton) R. Sant. Gomphillaceae Crustose 2 Bacidia apiahica (Müll.Arg. )Zahlbr Bacidiaceae Crustose 3 Byssoloma subdiscordans (Nyl.) P. James Pilocarpaceae Crustose 4 Calopadia phyllogena (Müll.Arg.) V zda Echtolechiaceae Crustose 5 Chrysothrix candelaris (L.) J. R. Laundon. Chrysothricaceae Crustose 6 Cryptothecia candida (Kremp.) R. Sant. Arthoniaceae Crustose 7 Dimerella dilucida (Krumpelh.) R. Sant. Gyalectaceae Crustose 8 Dirinaria confluens (Fr.) D.D.Awasthi. Physciaceae Foliose 9 Echinoplaca epiphylla Fèe. Gomphillaceae Crustose 10 Flavobathelium epiphyllum Lücking, Aptroot & Incertae sedis Crustose G.Thor 11 Graphis foliica var. major Awasthi & Singh Graphidaceae Crustose 12 Heterodermia comosa (Eschw.) Follmann & Physciaceae Foliose Redón 13 Heterodermia obscurata (Nyl.) Trevisan Physciaceae Foliose 14 Porina sp. Porinaceae Crustose 15 Sporopodium xantholeucum (Müll. Arg.) Echtolechiaceae Crustose Zahlbr. 16 Strigula subelegans Vainio Strigulaceae Crustose 17 Tricharia allostrigasa R. Sant. Gomphillaceae Crustose 18 Tricharia triseptate R. Sant Gomphillaceae Crustose Fig.1 Percentage of lichen growth form in present study 252 Int.J.Curr.Microbiol.App.Sci (2015) 4(6): 250-256 Fig.2 Dominance of lichen families with respect to species Fig.3 Few foliicolous lichens found in South Karnataka (a-i) a)Aulaxina quadrangular b) Byssoloma subdiscordans c) Calopadia phyllogena d) Dimerella dilucida e) Echinoplaca epiphylla f) Heterodermia comosa 253 Int.J.Curr.Microbiol.App.Sci (2015) 4(6): 250-256 g) Heterodermia obscurata h) Sporopodium xantholeucum i) Strigula subelegans Follicolous lichens apparently do not show with 9 species (Awasthi and Singh, 1972) any damage or negative effect on their and the Northeast India with 29 species phorophyte, although some species that (Singh and Pinokiyo, 2003), under 34 genera grow between the cuticle and epidermis, and 15 families. Compared to our study may utilize nutrients from their host leaf. foliicolous lichen species like Sporopodium The concept of a foliicolous taxon is xantholeucum (Müll. Arg.) Zahlbr. and consequently ecological rather than Strigula subelegans Vainio is found to be systematic (Serusiaux, 1989), henceforth grown in all reported regions in India lichens were collected randomly from (Pinokiyo et al., 2006), whereas species like different parts of south Karnataka region. Bacidia apiahica (Müll.Arg.) Zahlbr, Southern Karnataka comprises Kodagu, Byssoloma subdiscordans (Nyl.) P. James, Chamarajnagar and Mysore districts, where Tricharia allostrigasa R. Sant. are found foliicolous lichens were keenly surveyed in only in northeast parts and Nilgiri hills and this region. But these leaf-colonizing lichens Palni hills, Aulaxina quadrangular (Stirton) were found only in certain parts of Kodagu R. Sant. district, which lies in a Western Ghats belt contains evergreen to semi-evergreen and Are found in Andaman and Nicobar islands moist deciduous forest. and North East region. Foliose lichen species like Dirinaria confluens (Fr.) D. D. But the regions like Mysore and Awasthi. Heterodermia comosa (Eschw.) Chamarajanagar are dry-deciduous with
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