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Distribution area of the two floral morphs of Nigella damascena L. (Ranunculaceae) : a diachronic study using herbarium specimens collected in France / Catherine Damerval in Botany letters, vol. 165, n°3-4 (Année 2018)

Public [article]  inBotany letters > vol. 165, n°3-4 (Année 2018) . - pp. 396-403 Titre : Distribution area of the two floral morphs of Nigella damascena L. (Ranunculaceae) : a diachronic study using herbarium specimens collected in France Type de document : texte imprimé Auteurs : Catherine Damerval, Auteur ; Wafa Ben Othman, Auteur ; Domenica Manicacci, Auteur ; Florian Jabbour, Auteur Année de publication : 2018 Article en page(s) : pp. 396-403 Langues : Anglais (eng) Catégories : [ZG] France [Espèces (in biblio)] Nigella damascena L. Mots-clés : évolution morphologique  spécimen d’herbier  dimorphisme floral Résumé : "Perianth dimorphism in Nigella damascena (Ranunculaceae) has been documented for four centuries, and its genetic basis started to be studied almost a century ago. Based on herbarium collections, we reconstructed the evolution of the distribution area of the wild-type (perianth composed of a calyx and nectariferous petals) and mutant (apetalous) floral morphs in mainland France over the last two centuries. We showed that the collection localities of the wild-type morph are mostly concentrated in the southern coastal areas of France, whereas the collection localities of the mutant morph were less numerous but more scattered in France. The collection effort of both morphs peaked in the second half of the nineteenth century and continuously decreased afterwards. Results are interpreted taking into account the biases in the constitution of a herbarium collection. Knowledge about the spatial distribution and the frequency of occurrence of wild-type and mutant populations through time will help botanists and evolutionary biologists investigate the origin and ecological grounds for the maintenance and propagation of the apetalous morph in the wild." (source : auteurs) Type de publication : périodique Référence biblio : Damerval C., Ben Othman W., Manicacci D., Jabbour F., 2018 - Distribution area of the two floral morphs of Nigella damascena L. (Ranunculaceae) : a diachronic study using herbarium specimens collected in France. Botany letters, 165 : 396-403. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=68144 [article]

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Cote	Localisation	Disponibilité
P0177-6	Brest	Exclu du prêt

Soil depth detection by seeds and diurnally fluctuating temperatures : different dynamics in 10 annual plants / Arne Saatkamp in Plant and soil, vol. 349 (Année 2011)

Public [article]  inPlant and soil > vol. 349 (Année 2011) . - pp. 331-340 Titre : Soil depth detection by seeds and diurnally fluctuating temperatures : different dynamics in 10 annual plants Auteurs : Arne Saatkamp, Auteur ; Laurence Affre, Auteur ; Teddy Baumberger, Auteur ; Pierre-Jean Dumas, Auteur ; Aïda Gasmi, Auteur ; Sophie Gachet, Auteur ; Fabien Arène, Auteur Année de publication : 2011 Article en page(s) : pp. 331-340 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Anagallis arvensis [Espèces (in biblio)] Bifora radians [Espèces (in biblio)] Bifora testiculata [Espèces (in biblio)] Centaurea solstitialis [Espèces (in biblio)] Ceratocephalus falcatus [Espèces (in biblio)] Cnicus benedictus [Espèces (in biblio)] Nigella damascena [Espèces (in biblio)] Papaver rhoeas [Espèces (in biblio)] Ranunculus arvensis [Espèces (in biblio)] Roemeria hybrida [Thèmes] Banque de graines du sol [Thèmes] Graines Mots-clés : fluctuation diurne de température (DFT)  profondeur de l'enfouissement des graines Résumé : Background and Aims Seeds buried in the soil detect burial depth through light and diurnally fluctuating temperatures (DFT) and in this way limit losses due to germination too deep in the soil. DFTs and germination also increase in vegetation gaps. However, dry open environments with high DFTs can also increase seedling mortality, creating conflicting selection pressures for reaction to DFTs. Since this questions the general function of DFT detection, we therefore tested if interspecific differences in DFT detection are related to mortality in different soil depths. Methods We buried seeds of ten annual plants including species pairs of increasing and decreasing germination in response to DFTs. Seeds were buried in 5, 10 and 25cm soil depth and exhumed after two different burial times. Seed viability was tested using germination in growth chambers and tetrazolium. We also measured DFTs at these depths using temperature data loggers. Results DFT detection was not related to differences in mortality at three burial depths. Three species showed a clear pattern of depth dependent mortality, however inconsistently related to DFT detection. Conclusions Depth detection mechanisms are more species-specific than expected. Hence, interspecific differences in seed mortalities are difficult to predict by DFT detection alone and alternative soil depth sensing mechanisms should be explored in future. Type de publication : périodique Référence biblio : Saatkamp A., Affre L., Baumberger T., Dumas P.-J., Gasmi A., Gachet S., Arène F., 2011 - Soil depth detection by seeds and diurnally fluctuating temperatures : different dynamics in 10 annual plants. Plant and soil, 349 : 331-340. ID PMB : 72262 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72262 [article]

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