Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species
Seed reproduction is considered a critical bottleneck of the plant life cycle, constraining population growth, especially in the Mediterranean area. In this study, we investigated seed reproduction of Lamyropsis microcephala (Asteraceae), a threatened species occurring only in the Gennargentu massif...
Published in: | Arctic, Antarctic, and Alpine Research |
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2012
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Online Access: | http://hdl.handle.net/11584/103371 https://doi.org/10.1657/1938-4246-44.3.343 http://www.bioone.org/doi/abs/10.1657/1938-4246-44.3.343 |
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ftunicagliariris:oai:iris.unica.it:11584/103371 2024-04-21T07:53:01+00:00 Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species MATTANA, EFISIO FENU, GIUSEPPE BACCHETTA, GIANLUIGI Mattana, Efisio Fenu, Giuseppe Bacchetta, Gianluigi 2012 http://hdl.handle.net/11584/103371 https://doi.org/10.1657/1938-4246-44.3.343 http://www.bioone.org/doi/abs/10.1657/1938-4246-44.3.343 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000307990800008 volume:44 issue:3 firstpage:343 lastpage:349 numberofpages:7 journal:ARCTIC ANTARCTIC AND ALPINE RESEARCH http://hdl.handle.net/11584/103371 doi:10.1657/1938-4246-44.3.343 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84870680010 http://www.bioone.org/doi/abs/10.1657/1938-4246-44.3.343 info:eu-repo/semantics/article 2012 ftunicagliariris https://doi.org/10.1657/1938-4246-44.3.343 2024-03-25T16:03:14Z Seed reproduction is considered a critical bottleneck of the plant life cycle, constraining population growth, especially in the Mediterranean area. In this study, we investigated seed reproduction of Lamyropsis microcephala (Asteraceae), a threatened species occurring only in the Gennargentu massif (CE Sardinia, Italy). Seed output was quantified in two of the four localities where the species occurs, which differed in population size. Germination of seeds from all the four localities was assessed, both in the field and under controlled conditions, and the annual trend of soil temperature recorded by data-loggers. Plants had ca. 60 cypselas (i.e. the fruits of Asteraceae) per capitulum in the larger Rio Aratu and ca. 30 in the smaller Pisargiu locality, with only ca. 1.7 and 0.3 germinating cypselas per capitulum, respectively. Under controlled conditions, seeds of the two large localities (Bau ‘e Laccos and Rio Aratu) germinated above 80%, while those of the two small ones (Bruncu Spina and Pisargiu) did not reach 55%. All seeds sown in the field germinated in April–June, when diurnal fluctuations of temperatures were almost 10 times higher than in winter, limiting the length of the growing season before the onset of summer drought, and highlighting an increasing threat from global warming. Article in Journal/Newspaper Antarctic and Alpine Research Università degli Studi di Cagliari: UNICA IRIS Arctic, Antarctic, and Alpine Research 44 3 343 349 |
institution |
Open Polar |
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Università degli Studi di Cagliari: UNICA IRIS |
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ftunicagliariris |
language |
English |
description |
Seed reproduction is considered a critical bottleneck of the plant life cycle, constraining population growth, especially in the Mediterranean area. In this study, we investigated seed reproduction of Lamyropsis microcephala (Asteraceae), a threatened species occurring only in the Gennargentu massif (CE Sardinia, Italy). Seed output was quantified in two of the four localities where the species occurs, which differed in population size. Germination of seeds from all the four localities was assessed, both in the field and under controlled conditions, and the annual trend of soil temperature recorded by data-loggers. Plants had ca. 60 cypselas (i.e. the fruits of Asteraceae) per capitulum in the larger Rio Aratu and ca. 30 in the smaller Pisargiu locality, with only ca. 1.7 and 0.3 germinating cypselas per capitulum, respectively. Under controlled conditions, seeds of the two large localities (Bau ‘e Laccos and Rio Aratu) germinated above 80%, while those of the two small ones (Bruncu Spina and Pisargiu) did not reach 55%. All seeds sown in the field germinated in April–June, when diurnal fluctuations of temperatures were almost 10 times higher than in winter, limiting the length of the growing season before the onset of summer drought, and highlighting an increasing threat from global warming. |
author2 |
Mattana, Efisio Fenu, Giuseppe Bacchetta, Gianluigi |
format |
Article in Journal/Newspaper |
author |
MATTANA, EFISIO FENU, GIUSEPPE BACCHETTA, GIANLUIGI |
spellingShingle |
MATTANA, EFISIO FENU, GIUSEPPE BACCHETTA, GIANLUIGI Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
author_facet |
MATTANA, EFISIO FENU, GIUSEPPE BACCHETTA, GIANLUIGI |
author_sort |
MATTANA, EFISIO |
title |
Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
title_short |
Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
title_full |
Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
title_fullStr |
Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
title_full_unstemmed |
Seed production and in situ germination of Lamyropsis microcephala (Asteraceae), a threatened Mediterranean mountain species |
title_sort |
seed production and in situ germination of lamyropsis microcephala (asteraceae), a threatened mediterranean mountain species |
publishDate |
2012 |
url |
http://hdl.handle.net/11584/103371 https://doi.org/10.1657/1938-4246-44.3.343 http://www.bioone.org/doi/abs/10.1657/1938-4246-44.3.343 |
genre |
Antarctic and Alpine Research |
genre_facet |
Antarctic and Alpine Research |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000307990800008 volume:44 issue:3 firstpage:343 lastpage:349 numberofpages:7 journal:ARCTIC ANTARCTIC AND ALPINE RESEARCH http://hdl.handle.net/11584/103371 doi:10.1657/1938-4246-44.3.343 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84870680010 http://www.bioone.org/doi/abs/10.1657/1938-4246-44.3.343 |
op_doi |
https://doi.org/10.1657/1938-4246-44.3.343 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
44 |
container_issue |
3 |
container_start_page |
343 |
op_container_end_page |
349 |
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1796936291063955456 |