Distribution and Germination Characteristics of<i>Astragalus gines-lopezii</i>: An Endangered Species

Ramos, Soledad; Rincón, Sara; Vázquez, Francisco Ma

doi:10.5735/085.047.0502

Cited by 5 publications

(10 citation statements)

References 12 publications

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“…Reproductive and nonreproductive plants were found together in all known subpopulations of A. gines-lopezii, instead of the distribution found by Ramos et al (2010) for the same species. Results from the present study have highlighted the high reproductive capacity of A. gineslopezii on the basis of a high production of flowers and seeds, although this production is not so high if it is compared with data of A. nitidiflorus, one of the phylogenetically closest species to A. gines-lopezii in the genus (MartinezSanchez et al, 2011) (690 flowers per individual versus 39, respectively).…”

Section: Discussionmentioning

confidence: 72%

“…According to the methodology of Iriondo (2011), groups of individuals that were separated from one another by a distance of 1 km were considered as belonging to different populations, assuming that gene flow was sporadic or negligible. The distribution of A. gines-lopezii was restricted to a very small area of the La Calera and Maria Andres mountain ranges (Badajoz Province) (Calera and Andres populations, hereafter), although its exact distribution and census were undetermined (Ramos et al, 2010). Prior to this work, the Andres population was estimated to be fewer than 250 individuals, and a census of the Calera population did not exist (Ramos et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Despite the relevance of the genus Astragalus, information on its germination characteristics is still partial and limited to a reduced number of Astragalus species (Acharya et al, 2006;Eisvand et al, 2006;Patane and Gresta, 2006;Kim et al, 2008;Martinez-Fernandez, 2012). Prior to this work, Ramos et al (2010) analyzed some germination characteristics of A. gines-lopezii seeds.…”

Section: Introductionmentioning

confidence: 99%

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Census, reproductive biology, and germination of Astragalus gines-lopezii (Fabaceae), a narrow and endangered endemic species of SW Spain

2014

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Abstract:Astragalus gines-lopezii Talavera, Podlech, Devesa & F.M.Vazquez (Fabaceae) is a threatened endemic species with a distribution restricted to a very small area in Badajoz Province (Extremadura Region, SW Spain) and only 2 populations are known. This species was catalogued in the "Endangered" category in the 2008 Red List and the 2010 Threatened Spanish Vascular Flora List. Despite its status as an endangered species, at present very little is known about the distribution, census, and reproductive biology of this species. In this study we have carried out an exhaustive census of A. gines-lopezii, and we have evaluated the production of flowers, fruits, and seeds and the existence or not of intra-and interpopulation variability in seed germination. Results have highlighted the high reproductive capacity of this species on the basis of a high production of flowers, fruits, and seeds. Mechanical scarification of seeds was effective for increasing germination. Thus, initial germination (22%-60%) was increased to 97%-99% when seeds were rubbed with sandpapers. A high intra-and interpopulation variability in seed germination was found in this species. A. gines-lopezii produces seeds with different degrees of physical dormancy, varying this grade among different individuals within a population.

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Section: Discussionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Census, reproductive biology, and germination of Astragalus gines-lopezii (Fabaceae), a narrow and endangered endemic species of SW Spain

2014

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“…Keshtkar et al (2008) found that germination of control seeds of A. cyclophyllon was 55% and germination of treated seeds was 70% (an average of treatments), which is equal to 15% germination improvement (Table 1). Ramos et al (2010) concluded that seeds of the Spanish endemic A. gines-lopezii were non-dormant. However, since the seeds were stored for 1 year before they were tested for germination it is not known if fresh seeds were dormant or non-dormant.…”

Section: Resultsmentioning

confidence: 99%

A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

Soltani

Baskin

et al. 2020

Seed Sci. Res.

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Astragalus is the largest genus of seed plants with 3000 or more species that occurs naturally on several continents. The genus has some use as a forage and medicine and in industry, and many of the species are rare endemics threatened with extinction. The seeds are reported to be dormant at maturity, and various treatments have been used in an attempt to germinate them. Our primary aim was to determine via a meta-analysis the most effective way(s) to break dormancy in seeds of this species-rich genus. Mechanical and chemical (conc. sulphuric acid) scarification were by far the best of 12 treatments for breaking seed dormancy of the 40 species included in our meta-analysis, whereas prechilling, gibberellin and smoke were ineffective. These results along with those of imbibition tests confirm that seeds of the examined Astragalus species have physical dormancy (PY). Further, PY in these 40 species and (its documented occurrence) in 118 species that could not be included in our meta-analysis transcends climatic and geographic boundaries, edaphic conditions, life cycle/life form types and infrageneric phylogeny. Thus, it seems likely that most species of Astragalus have PY. However, in addition to PY, physiological dormancy (PD), that is, combinational dormancy (PY + PD), has been reported in a few species of Astragalus. This study should be useful to both basic and applied scientists who want to germinate seeds of Astragalus.

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“…There is an extensive literature worldwide on the germinative requirements of rare and/or threatened species (e.g., Andreou et al 2011;Kato and Kadono 2011;Coelho et al 2012;Del Vecchio et al 2012; Van der Walt and Witkowski 2017), but in Spain, the country with the highest number of vascular plants among the European and Mediterranean countries and one of the highest rates of threatened species (MAPAMA 2014;Moreno Saiz et al 2015), such studies are still scarce and therefore necessary (e.g. Navarro and Guitián 2003;Pérez-García 2008;Herranz et al 2010;Ramos et al 2010;Narbona et al 2013;Martinez-Fernandez et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Seed germination of Carex lainzii Luceño, E. Rico & T. Romero: An endemic Spanish endangered species

et al. 2019

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Abstract. Ribeiro KAF, Madeira de Medeiros C, Agudo JAS, Sánchez JS. 2019. Seed germination of Carex lainzii Luceño, E. Rico & T. Romero: An endemic Spanish endangered species. Biodiversitas 20: xxxx. Strategies to halt the decline of biodiversity include: in-situ and ex-situ conservation, the latter already considered at the global level essential in conservation programs. The results of the germinative responses of Carex lainzii Luceño, E. Rico & T. Romero (Cyperaceae), an endemic Spanish endangered species, are presented in this work, to different trials carried out in the laboratory with seeds harvested in the two known populations of that community. Treatments with and without 0.2% potassium nitrate (KNO3) were tested for four, six and eight months in cold stratification at 5 °C in two germination chambers at different temperatures (22/10 °C and 27/15 °C with a photoperiod of 12/12 hours). The results indicate that there is a large difference in germination rates between the two populations. The use of KNO3 did not increase germination rates in any case, but differences were found between periods of cold stratification, with six months being the most effective. On the other hand, the germination rates of both populations remain low (17.58% and 2%) compared to the obtained rate of seed viability. With this first approach to the understanding of the germination requirements of C. lainzii, it becomes clear that new essays are needed to obtain better results, in order to effectively implement the protection plans of C. lainzii populations.

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Distribution and Germination Characteristics ofAstragalus gines-lopezii: An Endangered Species

Cited by 5 publications

References 12 publications

Census, reproductive biology, and germination of Astragalus gines-lopezii (Fabaceae), a narrow and endangered endemic species of SW Spain

Census, reproductive biology, and germination of Astragalus gines-lopezii (Fabaceae), a narrow and endangered endemic species of SW Spain

A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

Seed germination of Carex lainzii Luceño, E. Rico & T. Romero: An endemic Spanish endangered species

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