BIBLIOS

Título
Intra- and inter-specific variations in chitin in lichens along a N-deposition gradient

Autores
Silvana Munzi
Cristina Cruz
Dep. Biologia Vegetal
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais
Rodrigo Maia
Cristina Máguas
Dep. Biologia Vegetal
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais
Maria Margarida Perestrello-Ramos
Dep. Biologia Vegetal
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais
Cristina Branquinho
Dep. Biologia Vegetal
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais

Tipo
Artigos em Revista

Resumo
The mechanisms of nitrogen (N) tolerance in lichens are not yet fully understood. Here, we investigated how the increase of chitin content is related with N excess at inter- and intra-specific levels, by using species with differing ecological N tolerances (the tolerant Xanthoria parietina and Parmotrema hypoleucinum and the sensitive Evernia prunastri and Usnea sp.) and thalli of X. parietina and P. hypoleucinum from sites with different availabilities of N of agricultural origin (livestock), as confirmed by lichen N content and δ15N. Nitrogen, chitin (N-containing compound), and ergosterol contents were measured in lichen thalli. Nitrogen and chitin contents were higher in tolerant species than those in sensitive ones (inter-specific level) and in thalli collected from the N-polluted site than in thalli from the clean site (intra-specific level). We suggest that chitin contributes to N stress tolerance in lichens, and that excess N can be partially stored as chitin (non-toxic form) in the cell walls of tolerant species.


Suporte
Environmental Science and Pollution Research

ISSN/ESSN
0944-1344

Editora
Springer Nature



Identificadores
URL - http://dx.doi.org/10.1007/s11356-017-0378-3
DOI - 10.1007/s11356-017-0378-3

Identificadores de Qualidade
Web Of Science Q2 (2017) - 2.8 - ENVIRONMENTAL SCIENCES - SCIE
SCOPUS Q1 (2017) - 0.858 - Pollution
SCIMAGO Q2 (2017) - 0.858 - Pollution