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Comparative evaluation of antimicrobial activity of methanolic extract and phenolic compounds of a liverwort, Reboulia hemispherica was carried out by Agar well diffusion technique. The Gram positive bacteria were more sensitive than the Gram negative ones, while the fungal species were least sensitive. R. hemispherica extract exhibited best results against Staphylococcus aureus, although it was active against all tested microbes. The antimicrobial activity increased with the increase in the concentration of the extract except in Klebsiella sp. S. aureus, E. faecalis and Bacillus cereus were inhibited more by the crude methanol extract of R. hemispherica than the phenolic compounds isolated from the extract. A. niger was inhibited equally by the crude methanol extract as well as the phenolic compounds. B. subtilis, E. coli, P. aeruginosa, K. sp. and P. notatum were inhibited more by phenolic compounds than the crude methanol extract of R. hemispherica. Thus phenolic compounds of R. hemispherica should be studied further for use as antimicrobial agent.
165
The present phylogenetic analysis was conducted using mitochondrial genome sequences of plants to infer evolutionary relationship of bryophytes. Paraphyly of bryophytes was shown by reconstructed trees. Liverworts are the first to diverge therefore appeared as sister to land plants in nucleotide based trees. However protein sequences based tree show mosses and liverworts to form a joint clade. Hornworts formed sister relationship with vascular plants.
171
Combined data from chloroplast and mitochondrial genome sequences showed paraphyly of bryophytes
(2013)
The present study was conducted using chloroplast and mitochondrial genome sequences of plants to gain insight on evolutionary relationship of bryophytes. The representative taxa were selected considering the availability of both organelle genome sequences. Phylogenetic analysis using combined data from chloroplast and mitochondrial sequences infer paraphyly of bryophytes.
191
Microsatellites also known as simple sequence repeats (SSRs) are short repeat motifs (1-6 bp) found in DNA sequences Detection of microsatellites is important for the development of molecular markers and to study the mapping of traits of economic, medical or ecological interest. In the present study, chloroplast genome sequence of Anthoceros formosae, downloaded from the National Center for Biotechnology Information (NCBI) was mined with the help of MISA tool to detect SSRs in chloroplast genome (cpSSRs). A total of 67 SSRs were detected with a density of 1 SSR/2.4 kb in 161.162 kb sequence mined. Depending on the repeat units, the length of SSRs ranged from 12 to 18 bp for mono-, 14 to 46 bp for di-, 12 to 27 bp for tri-, 12 to 20 bp for tetra and 18 bp for hexa-nucleotide repeats. Mononucleotide repeats were the most frequent repeat type (35.82%) followed by dinucleotide repeats (25.37%). Penta-nucleotide repeats were not detected in chloroplast genome sequence of Anthoceros formosae.
196
Mining of simple sequence repeats in chloroplast genome of a parasitic liverwort: Aneura mirabilis
(2013)
Aneura mirabilis is a parasitic liverwort with a chloroplast genome size of 108007 bp. In this study simple sequence repeats (SSRs) were detected using bioinformatics approch in plastid genome of Aneura mirabilis. Due to its small genome size only 19 repeats were detected showing a density of 1 SSR/5.68 kb. The length of SSRs ranged from 12 to 20 bp. Mononucleotide repeats were the most frequent repeat type (36.84%) followed by tetranucleotide repeats (31.58%). Moreover hexanucleotide repeats were absent in chloroplast genome sequence of Aneura mirabilis.
163
The availability of organelle genome sequences in public databases facilitates the reconstruction of land plants phylogeny. Therefore the present phylogenetic analysis was conducted using chloroplast genome sequences of plants to study phylogenetic relationship of bryophytes. The representative taxa were selected considering the availability of organelle genome sequences in database. Inferred tree topologies showed paraphyly of bryophytes with sister relationship between hornworts and vascular plants irrespective of the method (Maximum Likelihood and Bayesian Inference) and type of sequences (Nucleotide and Protein) used. Among bryophytes liverworts are the first to diverge therefore appeared as sister to land plants. Moreover land plants formed a monophyletic group.
181
During the analysis of collections made by the author and company in Madikeri (Coorg) district the need of an updated checklist became eminent. Literature studies were carried out alongside with the identification of specimen. Liverworts were added to the existing checklist of mosses of Karnataka. Location information of previous publications has been critically revised and reflected in the current list. An extended history of the bryological exploration of the state of Karnataka is given.
162
Allelopathic effect of Stichococcus bacillaris Nageli (Green Alga) on the growth of two bryophytes
(2013)
Stichococcus bacillaris (Green Alga) growth was observed as a contaminant on two taxa of bryophytes, a thalloid liverwort Lunularia cruciata (L.) Dumort. ex. Lindb. and a hornwort Folioceros physocladus Bharad. ex Schiffn. et Pande, growing on soil in pots in acclimatization chamber of Moss House at National Botanical Research Institute, Lucknow, India. Due to this algal contamination, suppression of growth of these bryophytes has been observed. It was evident that succession of Stichococcus bacillaris and its interaction with bryophytes played a significant role of allelopathy.
172
Growth of nine species of cyanobacteria was observed on eight species of bryophytes (thalloid liverworts and mosses) growing in the polyhouse, Bryophyte conservatory (Moss House), at National Botanical Research Institute, Lucknow, India. Bryophytes were cultured in the laboratory and transferred to polyhouse for hardening and acclimatization. Cyanobacterial growth was observed on the bryophytes as a contamination due to which there was suppression of bryophyte growth. It was evident that cyanobacteria played a significant role of allelopathy.