Plant conservation: old problems, new perspectives

Heywood, V. H.; Iriondo, José María

doi:10.1016/s0006-3207(03)00121-6

Cited by 225 publications

(137 citation statements)

References 43 publications

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“…These populations should be prioritized for insitu conservation. Also, ex-situ conservation can be critical to safeguarding endangered species (Heywood and Iriondo, 2003). Thus, we recommend the establishment of a core collection based from the different genetic cluster of this species.…”

Section: Conservation Implicationsmentioning

confidence: 99%

Genetic diversity and population structure of the endangered argan tree (Argania spinosa L. Skeels) in morocco as revealed by SSR markers: Implication for conservation

Yatrib¹,

Belkadi²,

Medraoui³

et al. 2017

Aust J Crop Sci

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Argania spinosa L. is an endangered tree of great socio-economic and ecological value in Morocco. In this study, thirteen nuclear SSR primer pairs were used to assess the genetic diversity and structure of 24 natural populations, including 240 individuals, representing 4 geographic regions. A total of 245 alleles were detected with an average of 18.5 per locus ranging from 6 to 35. The polymorphism information content (PIC) was in the range of (0.487-0.936) showing the good discriminating power of the SSR loci used. The observed and the expected heterozygosity across all populations and loci ranged from 0.372 to 0.777 and from 0.486 to 0.735, respectively. Analysis of molecular variance (AMOVA) revealed that the main variation existed within populations (78%) rather than among populations (12%). The Mantel test displayed no significant correlation between the geographic distance and the genetic distances for all populations. The STRUCTURE analysis and UPGMA clustering grouped 240 samples from 24 populations into two subgroups. Implications of the results for argan tree conservations are also discussed in this paper.

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Section: Conservation Implicationsmentioning

confidence: 99%

Genetic diversity and population structure of the endangered argan tree (Argania spinosa L. Skeels) in morocco as revealed by SSR markers: Implication for conservation

Yatrib¹,

Belkadi²,

Medraoui³

et al. 2017

Aust J Crop Sci

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“…Nowadays degradations are also associated to an increase in uncontrolled anthropogenic burnings and in fire frequency (while natural fires are a rare event, farmers burn grasslands annually to stimulate grass regrowth in order to support cattle breeding), wood extraction, eucalyptus plantation, harvesting of ornamental plants (orchids, bromeliads, Eriocaulaceae) (Giulietti et al 1997), and road construction (Barbosa et al 2010). While threats increase, limited data on conservation targets, such as plant communities (Heywood and Iriondo 2003), hamper the conservation and the restoration of these campos rupestres. Indeed, to implement a conservation network, lists of habitats (described by their environmental characteristics and their plant communities) and species that are recognized as being of interest are necessary.…”

Section: Introductionmentioning

confidence: 99%

Vegetation composition and structure of some Neotropical mountain grasslands in Brazil

2015

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The description and understanding of plant communities is fundamental for the implementation of conservation or restoration programs, especially when these communities are highly threatened and need to be restored. Campos rupestres, some Neotropical mountain grasslands located in central Brazil and part of the Cerrado biome (covering 2 million km²) host unique plant communities, currently threatened by quarrying and mining. The grassy matrix of campos rupestres, has long been considered a rich mosaic under the control of local topography and the nature of substrate, but this affirmation has not been well studied. We analyzed whether plant communities varied in relation to edaphic factors within the stony substrate and the sandy substrate of this grassy matrix. We selected 5 sites where occur both grasslands on stony substrate and on sandy substrate, and we carried out vegetation surveys and soil analyses. We counted 222 plant species within our communities, among which 38.6% are exclusively found on campos rupestres. Our results show that both soil-types are strongly acidic, nutrient poor and exhibit a seasonal variation. Phosphorus increases and pH and organic carbon decrease during the dry season. Stony soils are slightly richer in nutrients than sandy soils and differences in soil granulometry and composition have led to the formation of distinct plant communities. Some species are confined to either one or the other grassland-type, which makes the plant composition of each community unique. Variations in edaphic factors generate heterogeneous grasslands favorable to a high plant diversity. Conservation programs and restoration actions have to maintain or recreate this heterogeneity. The presence of distinct plant communities implies that different strategies might be adopted to improve the restoration of these ecosystems.

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“…Ex situ conservation methods imply collecting selected or representative samples of the genetic diversity of each species and storing them outside the natural environmental conditions in which the species has evolved. The storage of germplasm of endangered plants is carried out by botanic gardens and dedicated germplasm facilities (seedbanks, field gene banks, tissue and cell culture, cryopreservation) (Heywood and Iriondo, 2003). Seed banking, is used for the maintenance of most collections ex situ often to internationally agreed standards.…”

Section: Introductionmentioning

confidence: 99%

Callus induction and plant regeneration of the endemic Astragalus nezaketae in Turkey

Erişen¹,

Yorgancılar²,

Atalay³

et al. 2010

Electron Journ of Biotechnol

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A callus induction and plant regeneration protocol was developed from leaf and petiole explants of the endemic Astragalus nezaketae. Explants were cultured on Murashige and Skoog medium (MS) supplemented with different plant growth regulators (PGRs) [α-naphthaleneacetic acid (NAA), benzyladenine (BA), 2,4-dichlorophenoxyacetic acid (2,4-D), kinetin (Kin), thidiazuron (TDZ)]. The combinations and concentrations of PGRs were shown significant variations for the frequency of callus formation, appearence of callus and the potential of callus differentiation. NAA x BA have been found highly affective in callusing and plant regeneration. Other PGRs have not resulted in callus differentiation for shoot formation. The highest number of shoots (6/explants) was obtained from leaf explants cultured on MS with 0.5 mg/l NAA and 4 mg/l BA. The regenerated shoots transferred to rooting medium (MS with 0.5 mg/l indole-3-butyric acid) were successfully rooted (100%) and showed rapid elongation. Rooted plantlets were acclimatized in pots containing 1:1 mixture of peat and perlite.

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Plant conservation: old problems, new perspectives

Cited by 225 publications

References 43 publications

Genetic diversity and population structure of the endangered argan tree (Argania spinosa L. Skeels) in morocco as revealed by SSR markers: Implication for conservation

Genetic diversity and population structure of the endangered argan tree (Argania spinosa L. Skeels) in morocco as revealed by SSR markers: Implication for conservation

Vegetation composition and structure of some Neotropical mountain grasslands in Brazil

Callus induction and plant regeneration of the endemic Astragalus nezaketae in Turkey

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