Chemistry of &lt;i&gt;Heterodermia microphylla&lt;/i&gt;, a lichen new to Sri Lanka

Bombuwela, Karunananda; Kathirgamanathar, Selvaluxmy; Thadhani, Vinitha M.; Jayalal, Rgu; Adikaram, N. K. B.; Wijesundara, Siril; Andersen, Raymond J.; Wolseley, P. A.; Karunaratne, Veranja

doi:10.4038/jnsfsr.v36i3.163

Cited by 2 publications

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“…can benet from this method. 21,[34][35][36][37] Scientists aiming for better understanding of ionization mechanism and/or analyte incorporation into the matrix during MALDI-MS operation might also nd this study interesting. To the best of our knowledge, no study exploring the potential of commonly used dyes as dopants for the enhancement of signal intensity in MALDI-MS analysis has been published so far.…”

Section: Introductionmentioning

confidence: 99%

Application of dyes as doping agents in MALDI-MS matrices for the signal enhancement of proteins

2017

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Section: Introductionmentioning

confidence: 99%

Application of dyes as doping agents in MALDI-MS matrices for the signal enhancement of proteins

2017

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“…was 78.26%, 76.60%, and 68.77%, respectively [ Figure 4]. Earlier studies have shown the potential of some Heterodermia species such as H. boryi, [15] H. diademata, [36,49] H. comosa, [50] H. leucomelos, [42,51] H. microphylla, [43] and H. obscurata [8] to inhibit phytopathogenic fungi.…”

Section: Antibacterial Activity Of H Incanamentioning

confidence: 99%

“…Fungal diseases of plants result in decreased [ [42][43][44][45][46][47][48] In this study, we evaluated antifungal potential of two concentrations of an extract of H. incana, viz., 0.5 mg/ml and 1 mg/ml by poisoned food technique. Poisoning of medium with extract resulted in drastic reduction in mycelial growth of test fungi [ Table 3 and Figure 3].…”

Section: Antibacterial Activity Of H Incanamentioning

confidence: 99%

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2017

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Objectives: Lichens represent one of the most successful symbiotic interactions and are formed from a photobiont and a mycobiont. The foliose lichen genus Heterodermia is one of the cosmopolitan lichen genera. The present study was conducted to investigate antibacterial and antifungal activity of Heterodermia incana (Stirt.) D.D. Awasthi, a foliose macrolichen belonging to the family Physciaceae. Materials and Methods: Extraction of dried and powdered lichen was carried out by maceration process. Antibacterial activity of the extract was evaluated against 2 Gram-positive and 2 Gram-negative bacteria by agar well diffusion assay. Antifungal activity of extract was determined against 3 seedborne fungi by poisoned food technique. Results: Extract was effective in inhibiting the growth of all test bacteria in a concentration dependent manner with marked activity against Gram-positive bacteria. Bacillus cereus (zone of inhibition 2.26 ± 0.05 cm) and Pseudomonas aeruginosa (zone of inhibition 1.76 ± 0.05 cm) were inhibited to higher extent among Gram-positive and Gram-negative bacteria, respectively, at 10 mg/ml extract concentration. The extract was effective in inhibiting the mycelial growth of test fungi in a concentration dependent manner. Among three fungi, the susceptibility to extract was in the order: Fusarium sp. > Curvularia sp. > Alternaria sp. At extract concentration 1 mg/ml, >60% inhibition of all test fungi was observed. Conclusion:The lichen H. incana is a promising resource of antimicrobial agents. The observed bioactivities could be attributed to the presence of secondary metabolites such as atranorin and zeorin present in the extract. In suitable form, the lichen can be used as anti-infective agent and in the management of seedborne fungal diseases.

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Chemistry of <i>Heterodermia microphylla</i>, a lichen new to Sri Lanka

Cited by 2 publications

References 11 publications

Application of dyes as doping agents in MALDI-MS matrices for the signal enhancement of proteins

Application of dyes as doping agents in MALDI-MS matrices for the signal enhancement of proteins

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