Water-soluble phenolic metabolites in lichens and their potential role in soil organic matter formation at the pre-vascular stageстатья

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus, Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 сентября 2020 г.

Работа с статьей


[1] Water-soluble phenolic metabolites in lichens and their potential role in soil organic matter formation at the pre-vascular stage / A. G. Zavarzina, T. N. Nikolaeva, V. V. Demin et al. // European Journal of Soil Science. — 2019. — Vol. 70. — P. 736–750. Soil organic matter (SOM) is the largest reservoir of organic carbon in the biosphere. However, little is known about the processes of its formation at the prevascular stage. Lichens are among the pioneer colonizers on mineral substrates and are possible early land flora. This study is the first report on the identification and quantification of water-soluble phenolic compounds (PCs), potential precursors of humic substances, in epigeyic lichens from two systematic groups. Results show (Folin–Denis assay) that cyanobiont-containing lichens (order Peltigerales) possess three to five times more total soluble PCs than Lecanoralean lichens (Cladonia, Cetraria spp.) and mosses. Soluble PCs in lichens occur in the conjugated form. Alkali-hydrolysable compounds (esters) predominate over acid-hydrolysable ones (glycosides). Phenolic complexes with N-containing compounds or reducing sugars, or both, have been identified by thin layer chromatography (TLC). Benzoic acid derivatives were most common among PCs, detected in lichens by reversedphase high-pressure liquid chromatography (RP-HPLC). Phenolic acids occur in the order (μg 100 g−1 ): p-hydroxybenzoic (327–1,007) > syringic (87–361) > salycilic (135–210) > vanillic acid (12–19) (Peltigeralean lichens); salicylic (53–102) > p-hydroxybenzoic (45–54) > caffeic (29) > syringic (18) > vanillic acid (9–13) (Lecanoralean lichens). Protocatechuic, caffeic and p-coumaric acids were rare; ferulic acid was not detected. Syringyl and vanillyl aldehydes and ketones occur in much larger amounts than acids. Methoxy-substituted and orthosubstituted phenols, detected in lichens, are known for their high reactivity in soils under lignified vegetation, suggesting their important roles in SOM formation under a cryptogam cover. [ DOI ]

Публикация в формате сохранить в файл сохранить в файл сохранить в файл сохранить в файл сохранить в файл сохранить в файл скрыть