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Auteur Jonas V. Müller |
Documents disponibles écrits par cet auteur (4)
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheComparative germination responses to water potential across different populations of Aegilops geniculata and cultivar varieties of Triticum durum and Triticum aestivum / Simone Orsenigo in Plant biology, vol. 19, n°2 (Mars 2017)
Titre : Comparative germination responses to water potential across different populations of Aegilops geniculata and cultivar varieties of Triticum durum and Triticum aestivum Type de document : texte imprimé Auteurs : Simone Orsenigo, Auteur ; Filippo Guzzon, Auteur ; Thomas Abeli, Auteur ; Graziano Rossi, Auteur ; I. Vagge, Auteur ; Alma Balestrazzi, Auteur ; Andrea Mondoni, Auteur ; Jonas V. Müller, Auteur Année de publication : 2017 Article en page(s) : pp. 165-171 Langues : Anglais (eng) Résumé : "Crop Wild Relatives are often used to improve crop quality and yields because they contain genetically important traits that can contribute to stress resistance and adaptation. Seed germination of different populations of Aegilops geniculata Roth collected along a latitudinal gradient was studied under different drought stress in order to find populations suitable for improving drought tolerance in wheat. Different accessions of Aegilops neglecta Req. ex Bertol., Triticum aestivum L. and T. durum Desf. were used as comparison. Under full hydration, germination was high in all populations, but increasing drought stress led to reduced and delayed germination. Significant differences in final germination and mean time to germinate were detected among populations. Wheat, durum wheat and the southern population of Ae. geniculata were not significantly affected by drought stress, germinating similarly under all treatments. However, seed germination of the northern populations of Ae. geniculata was significantly reduced under high water stress treatment. Differences between populations of the same species could not be explained by annual rainfall across populations' distributions, but by rainfall during seed development and maturation. Differences in the germination responses to drought found here highlight the importance of source populations as criteria for genotype selection for pre-breeders" Type de publication : périodique Référence biblio : Orsenigo S., Guzzon F., Abeli T., Rossi G., Vagge I., Balestrazzi A., Mondoni A., Müller J., 2017 - Comparative germination responses to water potential across different populations of Aegilops geniculata and cultivar varieties of Triticum durum and Triticum aestivum. Plant biology, 19 (2) : 165-171. DOI : 10.1111/plb.12528 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66296
in Plant biology > vol. 19, n°2 (Mars 2017) . - pp. 165-171[article]Exemplaires(0)
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Titre : Comparative seed dormancy and germination of eight annual species of ephemeral wetland vegetation in a Mediterranean climate Type de document : texte imprimé Auteurs : Angelino Carta, Auteur ; Gianni Bedini, Auteur ; Jonas V. Müller, Auteur ; Robin J. Probert, Auteur Année de publication : 2013 Article en page(s) : pp. 339-349 Langues : Anglais (eng) Catégories : [Thèmes] Dormance des graines
[Thèmes] Germination des grainesMots-clés : mare temporaire Résumé : "Ephemeral wetland vegetation (EWV) in the Mediterranean Basin appears in temporary wetlands where favourable hydrological conditions exist only for a short time and year-to-year variability is high. Here, we report results of the seed germination, dormancy and desiccation tolerance of eight annual species living in this vulnerable habitat. Experiments were performed in laboratory conditions under constant and alternating temperatures and using a 12-h daily photoperiod or continuous darkness. Whilst germination and dormancy differed between the species, seeds demonstrated an absolute light requirement and prefer cool temperatures to germinate (mean ≤15 °C). Logistic regression analysis showed significant effects of alternating temperature in all the species except in Tillaea vaillantii whose germination was stimulated by constant temperature. Mean temperature was a significant term in the logistic models for the dormant species Cicendia filiformis, Linum radiola and T. vaillantii for which after-ripening was an effective dormancy-breaking treatment. From these results we infer three strategies of regeneration by seeds: (1) species germinating during the whole vegetative season (2) species germinating in a narrow temperature niche and (3) species requiring flooding (T. vaillantii). Seeds possessed orthodox storage behaviour (tolerating drying to 15 % relative humidity) and may be amenable to seed banking as a means of ex-situ conservation. We conclude that EWV species are adapted to the irregular presence of water with characteristics that are typical of neither truly aquatic nor wetland plants. These EWV species showed a more plastic germination response based on alternating and constant temperature sensitivity and a low proportion of dormant seeds." (source : auteurs) Type de publication : périodique Référence biblio : Carta A., Bedini G., Müller J., Probert R.-J., 2013 - Comparative seed dormancy and germination of eight annual species of ephemeral wetland vegetation in a Mediterranean climate. Plant ecology, 214 : 339-349. ID PMB : 70799 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70799
in Plant ecology > vol. 214 (Année 2013) . - pp. 339-349[article]Exemplaires(0)
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Titre : Ex situ collections and their potential for the restoration of extinct plants Type de document : texte imprimé Auteurs : Thomas Abeli, Auteur ; Sarah Dalrymple, Auteur ; Sandrine Godefroid, Auteur ; Andrea Mondoni, Auteur ; Jonas V. Müller, Auteur ; Graziano Rossi, Auteur ; Simone Orsenigo, Auteur Année de publication : 2020 Article en page(s) : pp. 303-313 Langues : Anglais (eng) Catégories : [Thèmes] Banque de graines
[Thèmes] Conservation
[Thèmes] Jardin botaniqueMots-clés : herbier introduction d'espèces réintroduction d'espèce collection de plantes conservation ex situ rétablissement de la diversité génétique des plantes conservation in situ Résumé : "The alarming current and predicted species extinction rates have galvanized conservationists in their efforts to avoid future biodiversity losses, but for species extinct in the wild, few options exist. We posed the questions, can t hese species be restored, and, if so, what role can ex situ plant collections (i.e., botanic gardens, germplasm banks, herbaria) play in the recovery of plant genetic diversity? We reviewed the relevant literature to assess the feasibility of recovering lost plant genetic diversity with using ex situ material and the probability of survival of subsequent translocations. Thirteen attempts to recover species extinct in the wild were found, most of which used material preserved in botanic gardens and seed banks
One case of a locally extirpated population was recovered from herbarium material. Eight (60%) of these cases were successful or partially successful translocations of the focal species or population; the other 5 failed or it was too early to determine the outcome. Limiting factors of the use of ex situ source material for the restoration of plant genetic diversity in the wild include the scarcity of source material, low viability and reduced longevity of the material, low genetic variation, lack of evolution (especially for material stored in germplasm banks and herbaria), and socioeconomic factors. However, modern collecting practices present opportunities for plant conservation, such as improved collecting protocols and improved cultivation and storage conditions. Our findings suggest that all types of ex situ collections may contribute effectively to plant species conservation if their use is informed by a thorough understanding of the aforementioned problems. We conclude that the recovery of plant species currently classified as extinct in the wild is not 100% successful, and the possibility of successful reintroduction should not be used to justify insufficient in situ conservation." (source : auteurs)Type de publication : périodique Référence biblio : Abeli T., Dalrymple S., Godefroid S., Mondoni A., Müller J., Rossi G., Orsenigo S., 2020 - Ex situ collections and their potential for the restoration of extinct plants. Conservation Biology, 34 (2) : 303-313. ID PMB : 69005 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69005
in Conservation Biology > vol. 34, n°2 (Année 2020) . - pp. 303-313[article]Exemplaires(0)
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Titre : Germination requirements of nine European Aegilops species in relation to constant and alternating temperatures Type de document : texte imprimé Auteurs : Filippo Guzzon, Auteur ; Jonas V. Müller, Auteur ; Thomas Abeli, Auteur ; Paolo Cauzzi, Auteur ; Nicola M. G. Ardenghi, Auteur ; Alma Balestrazzi, Auteur ; Graziano Rossi, Auteur ; Simone Orsenigo, Auteur Année de publication : 2015 Article en page(s) : pp. 349-354 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Aegilops Mots-clés : plante sauvage écologie germination reproduction graine culture Résumé : "The genus Aegilops represents the secondary gene pool of wheat. A better understanding of the germination behaviour of Aegilops species is important to improve their use in breeding programmes and strengthen their in situ/ex situ conservation. In this study, we investigated the germination behaviour of nine Aegilops species, five of them not yet investigated, under two alternating and two constant temperatures. Seed germination was higher than 60% in all temperature treatments and species. Alternating temperatures promoted higher germination rates in all the species and significantly enhanced seed germination in three species (Aegilops biuncialis, Aegilops geniculata and Aegilops neglecta), in comparison with constant temperatures. One of the rarest and least productive species in the genus (Aegilops uniaristata) displayed the highest germination. This study suggests that different (seed) regeneration strategies/niches occur across Aegilops species." (source : auteurs) Type de publication : périodique Référence biblio : Guzzon F., Müller J., Abeli T., Cauzzi P., Ardenghi N.-G., Balestrazzi A., Rossi G., Orsenigo S., 2015 - Germination requirements of nine European Aegilops species in relation to constant and alternating temperatures. Acta botanica gallica, 162 (4) : 349-354. ID PMB : 62042 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=62042
in Acta botanica gallica > vol. 162, n°4 (Année 2015) . - pp. 349-354[article]Exemplaires(1)
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