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Lichen Substances and Their Biological Activities
2015Lichens are known to synthesize variety of secondary metabolites which show wide range of biological activities. Many substances have been successfully isolated and identified from natural thalli and mycobiont cultures. Various biological activities have been screened for chemicals produced by mycobionts in culture medium and natural thalli of lichens.
Yoshikazu Yamamoto +3 more
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Antibacterial substances from lichens
Economic Botany, 1952Crude extracts of many lichens and some lichen acids have considerable antibacterial activity, suggesting their possible value in chemotherapy and providing some justification for their folk-lore use in some countries against pulmonary disorders.
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Lichen Substances in Mycobionts of Crustose Lichens Cultured on Media with Extra Sucrose
The Bryologist, 1996The common depside atranorin and the depsidones stictic and norstictic acids were found in mycobionts of several crustose lichens cultured on medium with 10% sucrose as well as in natural lichens. Usnic acid and anthraquinone were found in other mycobionts on 0.4 and/or 10% sucrose media.
Nobuo Hamada +3 more
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The lichen substances of the genus Evernia
Phytochemistry, 1963Abstract The small, morphologically conservative genus Evernia shows a simple pattern of chemical variation. Contrary to some recent reports, usnic acid occurs in most specimens of Evernia prunastri (L.) Ach. and the microchemical identifications of this constituent were confirmed by the isolation of (+ )-usnic acid from a large sample of the ...
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Biological Role of Lichen Substances
The Bryologist, 1986The bizarre phenolic substances produced by many lichen-formingfungi are assumed to have important biological roles, an idea that has led various investigators to speculate on topics ranging from light-screening to rock mineralization. At the present time, three proposed roles- antimicrobial, allelopathic and antiherbivore-are best supported by the ...
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The ecological role of secondary lichen substances
Biochemical Systematics and Ecology, 1978Key Word Index--Lichens; chemosystematics; herbivory; allelopathy; chemical weathering; depsides, depsi- dories; terpenes; pulvinic acid derivatives; anthraquinones; xanthones; usnic acid. Abstract--Considerable evidence, both direct and indirect, supports the hypothesis that many lichen secondary substances have significant ecological roles.
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Recent Progress in the Chemistry of Lichen Substances
1984Since the last major review of the chemistry of liehen substances by Huneck in 1971 (171) there has been an accelerating rate of development in this field. As with all areas of natural produet chemistry this impetus has been provided by more rapid and improved methods for detecting, isolating and purifying lichen metabolites and in the structural ...
J. A. Elix, A. A. Whitton, M. V. Sargent
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Canadian Journal of Botany, 1967
Tracer experiments with 14C-labeled compounds showed that phenylalanine, phenyllactic acid, and polyporic acid were readily incorporated into both pulvinic dilactone and calycin. Pulse-labeling experiments with phenylalanine and polyporic acid showed pulvinic dilactone was labeled more quickly than calycin, although eventually calycin may become more ...
W. S. G. Maass, A. C. Neish
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Tracer experiments with 14C-labeled compounds showed that phenylalanine, phenyllactic acid, and polyporic acid were readily incorporated into both pulvinic dilactone and calycin. Pulse-labeling experiments with phenylalanine and polyporic acid showed pulvinic dilactone was labeled more quickly than calycin, although eventually calycin may become more ...
W. S. G. Maass, A. C. Neish
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Biotechnological substances in lichens
2021Branislav Ranković, Marijana Kosanić
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