Détail de l'auteur
Auteur Per Milberg |
Documents disponibles écrits par cet auteur (4)
Affiner la recherche
Titre : A comparative study of germination ecology of four Papaver taxa Type de document : Tiré à part de revue Auteurs : Laila M. Karlsson ; Per Milberg Année de publication : 2007 Importance : 935-946 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Ecologie de la germination Mots-clés : Papaver Résumé : Background and aims: Comparative studies of closely related taxa can increase understanding of adaptations and changes in seed dormancy and germination preferences in an evolutionary perspective. For such studies, a method to describe and compare the performance of taxa in a general way is needed. The germination ecology of four Papaver taxa was studied with the aim of describing and comparing their responses to different seasonal temperature regimes. Methods: Germination of Papaver argemone, P. rhoeas, P. dubium ssp. dubium and P. dubium ssp. lecoqii was investigated in three different artificial climates over 2.5 years. Seeds were collected in southern Sweden, and samples from different populations were used as replicates of taxa. Key results: Despite substantial intra-taxa variation, there were clear taxon-specific responses. Most germination occurred in the warmest climate. In general, the warmer the climate the more germination occurred in autumn instead of spring. Papaver argemone, phylogenetically most distant from the other taxa, was, in contrast to the others, restricted to germinating only at lower temperatures. Conclusions: Seed dormancy and germination may be described by dormancy pattern, germination preferences and dormancy strength. The general dormancy pattern was a common feature for these taxa and therefore probably an evolutionary conservative character. Germination preferences varied between taxa, resulting in different temperature optima and intervals for germination, and dormancy strength was to some extent taxon-specific, but highly variable. The dormancy pattern explained how the taxa can perform as winter annuals in warmer climates, but mainly as summer annuals in colder climates. Hence, there is no need to interpret the within-taxon temporal differences in seedling emergence as local adaptations. In the field, an entire seed cohort will not germinate during a single season. Instead, emergence will be distributed over several seasons, regardless of local climate, weather and soil cultivation methods. Lien pérenne : DOI : 10.1093/aob/mcm045 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=133987 Karlsson, Laila M., Milberg, Per 2007 A comparative study of germination ecology of four Papaver taxa. Annals of Botany, 99 : 935-946.Documents numériques
Consultable
Article (2007)URLSeasonal changes in light requirement and dormancy in seeds of eight annual species / Lucy G Anderson (1996)
est un extrait de Xéme colloque international sur la biologie des mauvaises herbes / Association nationale pour la protection des plantes (France) (1996)
Titre : Seasonal changes in light requirement and dormancy in seeds of eight annual species Type de document : Extrait d'ouvrage Auteurs : Lucy G Anderson ; Per Milberg Année de publication : 1996 Importance : p. 17-24 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Physiologie de la germination Mots-clés : Papaver rhoeas L. Spergula arvensis L. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=85157 Anderson, Lucy G, Milberg, Per 1996 Seasonal changes in light requirement and dormancy in seeds of eight annual species. In: Xéme colloque international sur la biologie des mauvaises herbes. ANPP, Paris: 17-24.Seed bank of annual mudflat species at lake Vikarsjon, central Sweden / Per Milberg in Svensk botanisk tidskrift, 88 (4) (1994)
Titre : Seed bank of annual mudflat species at lake Vikarsjon, central Sweden Type de document : Imprimé Auteurs : Per Milberg ; B. Stridh Année de publication : 1994 Article en page(s) : 237-240 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Banque de semences dans le sol Mots-clés : Elatine Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137529
in Svensk botanisk tidskrift > 88 (4) (1994) . - 237-240Milberg, Per, Stridh, B. 1994 Seed bank of annual mudflat species at lake Vikarsjon, central Sweden. Svensk botanisk tidskrift, 88(4): 237-240.Seed size, shape and vertical distribution in the soil : indicators of seed longevity / Renée Marlies Bekker (1998)
Titre : Seed size, shape and vertical distribution in the soil : indicators of seed longevity Type de document : Tiré à part de revue Auteurs : Renée Marlies Bekker (1967-) ; Jan Pouwel Bakker ; U Grandin ; R. Kalamees ; Per Milberg ; Peter Poschlod ; Ken Thompson (1954-) ; J.H. Willems Année de publication : 1998 Importance : 834-842 Langues : Anglais (eng) Résumé : 1.We investigated the vertical distribution of seeds in the soil, using data from ninestudies in five European countries. We discovered significant correlations betweenseed shape and distribution in the soil.2.The classification of the longevity of seeds of plant species has been improved bythe introduction of a ‘longevity index’, expressing on a continuous scale the mostrecent information on seed longevity represented as the proportion of non-transientseed bank records in the database of Thompson et al. (1997). Remarkably, no differ-ence in seed longevity was found if the index was based on direct observations onlywhen compared with the index based on the complete data set where indirect, ‘depth-derived’ observations were included.3.Seed longevity was best estimated using a multiple regression model with anintegrated measure of seed size and shape and depth distribution of seeds.4.The shape of seeds, known to be a consistent character of species, was shown to beconstant within species, whereas depth distribution of seeds was highly variableamong sites. This is consistent with the variability of seed longevity found in publishedseed bank data. Lien pérenne : DOI : 10.1046/j.1365-2435.1998.00252.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134191 Bekker, Renée Marlies (1967-), Bakker, Jan Pouwel, Grandin, U, Kalamees, R., Milberg, Per, Poschlod, Peter, Thompson, Ken (1954-), Willems, J.H. 1998 Seed size, shape and vertical distribution in the soil : indicators of seed longevity. Functional Ecology, 12(4) : 834-842.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22012 B Tiré à part Centre de documentation Tirés à part Consultable Documents numériques
Article (1998)URL
