Regulation of urease activity of Cladina dendroides and its photobiont by lichen phenols

Legaz, Marı́a Estrella; Vicente, Carlos

doi:10.1016/0168-9452(89)90096-4

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…Acetone extracts of lichens were also used to assess their phenolic concentrations using a spectrophotometer (Legaz & Vicente ; Hyvarinen et al . ).…”

Section: Methodsmentioning

confidence: 99%

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Factors influencing the distribution of coastal lichens Hydropunctaria maura and Wahlenbergiella mucosa

2014

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Responses to abiotic and biotic stresses that potentially drive the vertical zonation of the intertidal lichens Hydropunctaria maura, an upper littoral lichen, and Wahlenbergiella mucosa, a lower littoral lichen, were investigated in field and laboratory experiments. When transplanted, both lichens exhibited an inability to survive outside their normal vertical distribution range. W. mucosa appeared to be unable to tolerate prolonged periods of desiccation following translocation from lower to upper littoral regions, whereas H. maura was unable to survive in lower littoral zones possibly owing to increased grazing pressure. The effect of desiccation in both lichens was compared using pulse amplitude modulated chlorophyll fluorescence and infra-red gas analysis; results indicated a more hydration-dependent nature of W. mucosa. Photosynthetic (algal) pigments and phenolic compounds were determined in both lichen thalli, and a range of additional coastal lichens occupying a natural gradient from upper to lower shore levels. Pigment composition and concentration in both lichen thalli were similar whereas levels of phenolic compounds were up to three times higher in W. mucosa than H. maura. Pigment and phenolic concentration and composition exhibited some seasonality across 13 different lichens originating from different shore levels. Phenolic concentration increased towards the lower shore, suggesting a potential anti-herbivory function. This marks the first study of pigments and phenolics in coastal lichen communities, and prompts further investigations on the particular physiological features of marine and maritime lichens that enable them to thrive in this extreme environment.

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“…Acetone extracts of lichens were also used to assess their phenolic concentrations using a spectrophotometer (Legaz & Vicente ; Hyvarinen et al . ).…”

Section: Methodsmentioning

confidence: 99%

“…Acetone extracts of lichens were also used to assess their phenolic concentrations using a spectrophotometer (Legaz & Vicente 1989;Hyvarinen et al 2000). Total phenolic contents were determined colorimetrically with an adapted Folin-Ciocalteu assay (Sanoner et al 1999).…”

Section: Pigment Composition and Phenolic Concentrationmentioning

confidence: 99%

Factors influencing the distribution of coastal lichens Hydropunctaria maura and Wahlenbergiella mucosa

2014

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“…However, the latter ones must be degradation products caused by the use of methanol in the mobile phase of the HPLC analysis or the storage conditions (Huovinen & Ahti 1986: 99, Legaz et al 1987. In material collected at Santa Rita Legaz et al (1987) and Legaz & Vicente (1989) reported only atranorin and usnic acid in C. dendroides in their thorough chemical analyses (incl. TLC, HPLC).…”

Section: The Taxamentioning

confidence: 99%

<p><strong>The lichen family Cladoniaceae in Paraiba, Pernambuco and Sergipe, Northeast Brazil</strong></p>

Ahtı

Stenroos

Filho

1993

BDE

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Field and herbarium studies of the lichen family Cladoniaceae in the states of Paraíba, Pernambuco and Sergipe, Northeast Brazil, yielded 22 species, many of them being new reports for the region. The phenolic compounds identified in each species are reported. Cladonia clathrata Ahti & Xavier Filho, Cladonia polita Ahti, Cladonia polyscypha Ahti & Xavier Filho, and Cladonia rugicaulis Ahti are described as new. C. clathrata, C. rhodoleuca Vainio, C. rugicaulis, C. salzmannii Nyl., and C. subminiata Stenroos appear to represent an element confined to northeastern Brazil.

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“…The potential effects of lichen compounds on lichen photobionts remain unclear. Legaz & Vicente (1989) proposed a ' urease-regulating mechanism ' based on direct inactivation of the enzyme by lichen substances, whereas Vicente & Estevez (1976) suggested another mechanism that involves chelation of Mn cations in the algal cells resulting in Hill reaction inhibition. Kinraide & Ahmadjian (1970) demonstrated that exposing species of Trebouxia to the sodium salt of usnic acid resulted in the inhibition of growth and photosynthesis, an increase in membrane permeability, and the immobilization of zoospores.…”

Section: Introductionmentioning

confidence: 97%

The Influence of pH and Lichen Metabolites (Vulpinic Acid and (+) Usnic Acid) on the Growth of the Lichen Photobiont Trebouxia 1rregularis.

Bačkor

Hudá

Repčák³

et al. 1998

The Lichenologist

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The quantitative response to two lichen metabolites, vulpinic acid and (+) usnic acid, on biomass production by the photobiont Trebouxia irregularis, isolated from the lichen Cladina mitis, was determined experimentally. The presence of usnic acid resulted in inhibition of photobiont growth, and the effect depended on the pH of the culture medium. The concentration effect of usnic acid was observed. The application of vulpinic acid almost completely inhibited the growth of T. irregularis and no significant differences were found among samples at different medium pH values.

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Regulation of urease activity of Cladina dendroides and its photobiont by lichen phenols

Cited by 14 publications

References 20 publications

Factors influencing the distribution of coastal lichens Hydropunctaria maura and Wahlenbergiella mucosa

Factors influencing the distribution of coastal lichens Hydropunctaria maura and Wahlenbergiella mucosa

<p><strong>The lichen family Cladoniaceae in Paraiba, Pernambuco and Sergipe, Northeast Brazil</strong></p>

The Influence of pH and Lichen Metabolites (Vulpinic Acid and (+) Usnic Acid) on the Growth of the Lichen Photobiont Trebouxia 1rregularis.

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