Production of several isoforms of beta-1,4-glucanase by the cyanolichen Peltigera canina

Ríos, Asunción de los; Ramírez, Rosalía; Estevez, Pilar

doi:10.1034/j.1399-3054.1997.1000118.x

Cited by 10 publications

(9 citation statements)

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“…Secondary metabolites, which in the case of saxicolous lichens determine biodeterioration through ion leaching from minerals (Chen et al 2000), are involved in the relationship of muscicolous, corticolous and terricolous lichens with plants, as both growth substrates and neighbors on soil, causing alleopathic interferences (Legaz et al 2004;Lawrey 2009). Enzymatic processes are involved in hyphal adhesion on and penetration within plant tissues (de los Rı´os et al 1997;Laufer et al 2006) as well as they have been recently suggested to explain carbonate dissolution by endolithic lichens (Tretiach et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Lepraria membranacea) on Grimmia sp., to the dissolution of the pectinized region of the cell wall (McWhorter 1921). The hyphal penetration through the cell wall has been related, in the case of the foliose Peltigera canina, to the production of multiple isoforms of b-1,4-glucanase (de los Rı´os et al 1997). The crustose Ochrolechia frigida colonizes its moss substrate as a gelatinous aposymbiotic prothallus which behaves, in various ways, in its early stages of development, as a saprotroph, a commensal, a biotrophic or necrotrophic parasite: hyphae grow in the moss tissues, penetrate and actively kill the cells, efficiently overgrow the organic substrate and provide a favorable microhabitat for the development of the lichenized thallus and its ascocarps (Gassmann and Ott 2000).…”

Section: Introductionmentioning

confidence: 99%

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Lichen-plant interactions

Favero‐Longo

Piervittori

2010

Journal of Plant Interactions

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Controversial data on the pathways and effects of lichen growth on and near bryophytes and vascular plants are reviewed. In most cases, plants which are used as growth substrates positively influence lichen mineral nutrition and are poorly affected by lichen overgrowth, but several reports of negative relationships, including lichen parasitism and allelopathic interferences, prevent generalizations. The allelopathy of terricolous lichens against neighboring plants has been suggested by in vitro investigations, and a multidirectional phytotoxic mode of action has been shown for lichen secondary metabolites. Recent researches on field settings, instead, offer little support of lichen allelopathy, and plant allelopathy against lichens has so far been neglected. A comparison with lichen-rock interactions indicates that a common set of physical and chemical factors can explain the heterogeneous reciprocal effects that exist between lichens and plants, which depend on the species involved, and highlights gaps that need further studies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lichen-plant interactions

Favero‐Longo

Piervittori

2010

Journal of Plant Interactions

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“…their photosynthesis. Some lichens have cellulase activity, thus being able theoretically to degrade external carbohydrates (Armstrong & Smith, 1996 ;de los Rios et al, 1997). However, because the contribution of such carbohydrates seems to be minor in lichen carbon budgets (Armstrong & Smith, 1996) it is assumed that photosynthetic CO # assimilation predominates as a major carbon source for lichens.…”

Section: mentioning

confidence: 99%

Tansley Review No. 117

Palmqvist

2000

New Phytologist

218

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Lichens are nutritionally specialized fungi (the mycobiont component) that derive carbon and in some cases nitrogen from algal or cyanobacterial photobionts. The mycobiont and photobiont live together in an integrated thallus, but they lack specific tissue for the transport of metabolites and resources between them. Carbon is acquired through photosynthesis in the photobiont, which is active when the lichen is wet and exposed to light. Lichen photosynthesis is limited primarily by water, light and nitrogen, but can also be constrained by slow diffusion of CO # within the wet thallus. The assimilated carbon is exported from photobiont to mycobiont, which also predominates in terms of biomass, and apparently regulates the size of the photobiont population. It has therefore generally been assumed that most of the carbon is used for growth and maintenance of the fungal hyphae. However, the extent of photobiont respiration in relation to mycobiont respiration has seldom been quantified ; neither do we know the pool sizes of various carbon sinks within lichens. Owing to this lack of fundamental data we do not know whether, or how, carbohydrate resources are regulated to maintain an optimal balance between energy input and expenditures in these symbiotic organisms. This review summarizes data on growth, carbon gain and carbon expenditures in lichens, with particular emphasis on factors determining the photosynthetic capacity of their photobionts. An attempt is made to introduce an economic analysis of lichen growth processes, a view that has often been adopted in studies of higher plants. Areas in which more data are needed for the construction of a model on ' lichen resource allocation patterns ' are discussed.

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“…Furthermore, cellulase activity has been well documented in several species, for example Evernia prunastri and Peltigera canina (Yagüe & Estévez 1988 a , b ; de los Rios et al . 1997), and probably occurs in almost all lichens. However, very little information is available on the occurrence and roles of peroxidase activity in lichens; such information will be important to understand the carbon dynamics of soils in lichen-rich habitats.…”

Section: Introductionmentioning

confidence: 99%

On the occurrence of peroxidase and laccase activity in lichens

Beckett¹,

Minibayeva

Liers

2013

The Lichenologist

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In our earlier work, we demonstrated that the oxidases tyrosinase and laccase occur widely in lichens from the Peltigerales. Recently, we discovered the occurrence of another oxidoreductase, a heme peroxidase, in the Peltigeralean ‘jelly lichens’ Leptogium and Collema. Here we present the results of a survey of peroxidase activity in a range of lichens. In addition to the jelly lichens, strong peroxidase activity also occurs within the Peltigeralean genera Lobaria, Pseudocyphellaria and Sticta. Significant activity occurs in the cell wall, and, unlike laccase activity, peroxidase activity increases considerably following the rehydration of dry thalli. However, activity is absent from Peltigera and from the non-Peltigeralean species tested here. Electrophoretic investigation showed that lichen peroxidases are oligomeric. Possible roles for peroxidases in lichen biology are discussed.

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Production of several isoforms of beta-1,4-glucanase by the cyanolichen Peltigera canina

Cited by 10 publications

References 0 publications

Lichen-plant interactions

Lichen-plant interactions

Tansley Review No. 117

On the occurrence of peroxidase and laccase activity in lichens

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