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Effect of nitrogen supply on the C/N balance in the lichen Evernia prunastri (L.) Ach
- Source :
- Volume: 37, Issue: 2 165-170, Turkish Journal of Biology
- Publication Year :
- 2013
- Publisher :
- The Scientific and Technological Research Council of Turkey (TUBITAK-ULAKBIM), 2013.
-
Abstract
- This study investigated the relationship between nitrogen and carbon in the thalli of the lichen Evernia prunastri, with an emphasis on the role of the C/N balance in the response of this species to N excess. For this purpose, thalli collected at a remote site were sprayed for 5 weeks with NH4NO3 (0.05 and 1 M) and (NH4)2SO4 (0.025 and 0.5 M) solutions, and later analyzed for their C and N content. The results showed that the total N content of thalli increased and the total C content decreased along with increasing N concentration in the treatment solutions. Consequently, the C/N ratio also significantly decreased in treated samples. The Fv/Fm ratio, taken as a vitality index, turned out to be positively correlated with C content and negatively correlated with N content. It is suggested that N stress is caused by the lack of compensation for elevated ammonium levels with higher C assimilation. It is concluded that E. prunastri is a suitable bioindicator of N pollution and that the C/N ratio deserves further investigation as a promising tool for early warning of N excess.
- Subjects :
- Key words: Ammonium,biomonitoring,fertilization,physiological parameters,symbiosis
Physiology
Ammonium
Biomonitoring
Fertilization
Physiological parameters
Symbiosis
Microbiology
Molecular Biology
Genetics
Agricultural and Biological Sciences (all)
Cell Biology
chemistry.chemical_element
Ammonium levels
Biology
chemistry.chemical_compound
Animal science
physiological parameters
Botany
Lichen
Evernia prunastri
biomonitorin
fertilization
symbiosis
physiological parameter
Nitrogen
C content
Thallus
chemistry
Vitality index
General Agricultural and Biological Sciences
Subjects
Details
- ISSN :
- 13036092 and 13000152
- Database :
- OpenAIRE
- Journal :
- Turkish Journal of Biology
- Accession number :
- edsair.doi.dedup.....ae0fa2b2e385736b2d963223cf9064ec