Present study analyses the phytochemicals in some selected lichens of Seshachalam Biosphere Reserve, Andhra Pradesh. The lichen species are identified as Heterodermia diademata (Taylor) D.D. Awasthi, Parmotrema andinum (Müll. Arg.) Hale, P. grayanum (Hue) Hale, P. nilgherrense (Nyl.) Hale, P. praesorediosum (Nyl.) Hale, P. reticulatum (Taylor) M. Choisy, P. tinctorum (Despr. ex Nyl.) Hale, Parmelinella wallichiana (Taylor) Elix and Hale, Ramalina conduplicans Vain. and Usnea baileyi (Stirt.) Zahlbr. A total of 30 crude extracts in three different solvents such as 2-Propanol, Methanol and Water were prepared. The preliminary phytochemical screening revealed the occurrence of tannins, saponins, glycosides, proteins and triterpenoides in all the species while alkaloids, flavonoids, carbohydrates and steroids were found in some of the species. Aqueous extracts of all the species did not contain alkaloids, flavonoids, carbohydrates and steroids. Out of 10 species glycosides was present in 8 species, followed by presence of tannins, alkaloids and triterpenoides in 6 species. Flavonoids and proteins were found in 5 species and saponins and carbohydrates were found in 3 species only. Steroides were reported in P. reticulatum and P. andinum. Alkaloids, carbohydrates, flavonoids, glycosides, proteins, steroids, tannins and triterpenoides were reported in 2-propanol and methanolic extracts. Saponins were completely lacking in 2-propanol extracts of all the species. This is the first report with detailed phytochemicals analysis of lichens from Eastern Ghats of India.
The district revealed the occurrence of 51 species belonging to 22 genera under 14 families. The lichen biota included 15 new records to Andhra Pradesh and five species endemic to India. Among the different growth forms foliose and crustose exhibit the maximum diversity represented by 22 and 21 species followed by 7 squamulose and 2 leprose lichens. Based on the habitat preference corticolous lichens showed maximum diversity represented by 32 species followed by 21 saxicolous and two ramicolous species while four species found growing on more than one substrates. Among the different families, Caliciaceae is the largest family which is consisting of 13 species under the five genera. Among the seven localities surveyed in the district, Gundumala and Penukonda hills exhibited maximum diversity of lichens represented by 34 and 26 species. Pyxine petricola Nyl. is widely distributed and recorded from 6 localities of the district. This species can be used for pollution monitoring studies in the area in future. The present paper is providing status of lichen diversity and their distribution pattern in Anantapur district for the first time.
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