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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Differential response of two acidophytic lichens to increased reactive nitrogen availability

Participants in the publication
Silvana Munzi (Author)
Unidade de I&D e Inovação
 CIUHCT
 Catarina Graça (Author)
Duarte Martins (Author)
Cristina Máguas (Author)
Dep. Biologia Vegetal
 CE3C
Summary
Lichens are one of the most responsive components of the ecosystem to reactive forms of nitrogen. In this work, we selected the lichen genera Cladonia and Usnea, composed of terricolous and epiphytic lichens respectively, and described as sensitive to nitrogen, to test the effects of different doses of nitrogen on lichen physiological parameters (photobiont and mycobiont vitality, chitin quantification, nitrogen content and stable isotopes analysis). The main objectives were to check if the activation of protective mechanisms could be stimulated in case of chronic stress (low nitrogen increase for prolonged time), and, if so, if a toxicity threshold could be identified above which these mechanisms fail. The two lichen genera were generally affected by prolonged exposure to increased nitrogen availability. However, Cladonia rangiformis was able to maintain physiological functioning at the lowest nitrogen doses used, whereas thalli of Usnea become overwhelmed. Moreover, the mycobiont appeared to be more sensitive than the photobiont responding to lower nitrogen doses. Although only studies of longer duration and testing more nitrogen doses will be able to determine an accurate toxicity threshold, these results give important clues on the use of lichens as biomonitors for the establishment of environmental policies.

Date of Submisson/Request
2022-10-31
Date of Acceptance
2023-02-22
Date of Publication
2023-03-09

Where published
Biologia

Publication Identifiers
ISSN - 1336-9563

Publisher
Springer Science and Business Media LLC

Volume
78
Number
8

Number of pages
9
Starting page
2049
Last page
2057

Document Identifiers
DOI - https://doi.org/10.1007/s11756-023-01366-x
URL - https://doi.org/10.1007/s11756-023-01366-x

Rankings
SCOPUS Q2 (2023) - 3.3 - Plant Science
Web Of Science Q3 (2023) - 1.4 - BIOLOGY

Keywords
Chitin Cladonia Ecophysiology Isotopic signature Toxicity threshold Usnea


Export

APA
Silvana Munzi, Catarina Graça, Duarte Martins, Cristina Máguas, (2023). Differential response of two acidophytic lichens to increased reactive nitrogen availability. Biologia, 78, 2049-2057. ISSN 1336-9563. eISSN . https://doi.org/10.1007/s11756-023-01366-x

IEEE
Silvana Munzi, Catarina Graça, Duarte Martins, Cristina Máguas, "Differential response of two acidophytic lichens to increased reactive nitrogen availability" in Biologia, vol. 78, pp. 2049-2057, 2023. 10.1007/s11756-023-01366-x

BIBTEX
@article{63965, author = {Silvana Munzi and Catarina Graça and Duarte Martins and Cristina Máguas}, title = {Differential response of two acidophytic lichens to increased reactive nitrogen availability}, journal = {Biologia}, year = 2023, pages = {2049-2057}, volume = 78 }