ALSOPHILA FIRMA PDF

Biotic Interactions (GloBI) · NCBI – National Center for Biotechnology Information. Alsophila firma. Open Interactive Map. Alsophila firma image. Click to Display. Brief summary. No one has contributed a brief summary to this page yet. Explore what EOL knows about Alsophila firma. Add a brief summary to this page. Alsophila firma (Baker) D.S. Conant is an accepted name. This name is the accepted name of a species in the genus Alsophila (family Cyatheaceae). The record.

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A study of spatial features of clones in a population of Bracken fern, Pteridium aquilinum Dennstaedtiaceae. Maternal inheritance of chloroplasts in the horsetail Equisetum variegatum Schleich. A molecular phylogeny of scaly tree ferns Cyatheaceae.

Using the allele data for each individual i.

Alsophila firma

The extant scaly tree ferns are commonly found in the tropics, from the wet lowlands to mid elevations. Therefore, the strong spatial aggregation observed in the two populations of A. Species with a high frequency of asexual reproduction, such as the apogamous C.

Genetics, phylogenetics, and biogeography: In the most recent phylogenetic study, Korall et al. In general, arborescent ferns should have more readily dispersed spores, and thus have weaker SGS than smaller, acaulescent species.

These differences might be a reflection of a sampling bias caused by missing nuclear genotypes, particularly for fitma in AH.

Many fern species have developed pre-zygotic mechanisms to promote outcrossing e. Autogamous allohomoploidy in Alsophila and Nephelea Cyatheaceae: Conform scale found in Sphaeropteris showing cells of equal size and orientation; 4B: The analysis of SGS, therefore, can reveal the existence of relevant underlying ecological processes, such as clonal propagation Dutetch et al.

Evolution of the climatic niche in scaly tree fiema Cyatheaceae, Polypodiopsida.

Tropicos | Name – Alsophila firma (Baker) D.S. Conant

wlsophila Single nucleotide polymorphisms were identified by direct chromatogram inspection with Consed Gordon et al. ATL is found in an unprotected cloud forest patch alsophilw c. Alsophila was reclassified to include ca.

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Complete chloroplast genome sequence of a tree fern Alsophila spinulosa: The O r function describes the expected number of points stems at a distance r from an arbitrary point. To fully understand these correlations, the presence of SGS should be investigated in other groups of plants with different biological attributes.

The radial shoot symmetry of a tree fern. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.

Despite the wind-dispersal of spores, outcrossing alophila system and arborescence, individual stems within short distances were genetically more similar than expected by chance. The plants of the Roraima Formation Guayana Shield are subjected so some extreme climatic conditions: In fern species with apogamy, such as C. The dirma performed on all sampled individuals indicated a more pronounced SGS when repeated genomic combinations were considered, considerably increasing the mean Sp statistic in both plastid SSRs and gapCp data not shown.

Environmental and neighbourhood effects on tree fern distributions in a Neotropical lowland rain forest. Genetic diversity estimates for plastid haplotypes plastid SSRs and nuclear alleles gapCp and statistics of clonal extent in the two studied fkrma of the tree fern Alsophila firma AH: The successful assessment of the mechanisms behind SGS in ferns, however, needs to incorporate the alslphila study of the ecology and genetics of the two free-living stages.

The arborescent rhizome of Cyathea medullaris. The location of individual stems was carefully mapped using the distance m and compass bearings between individuals, thus obtaining the relative spatial coordinates of each individual.

The tree fern A. The dictyostele vasculature of Alsophila firma. Dicksonia sellowiana ; 1B: SGS in ferns appears to be higher than in most seed plants analysed to date. Finally, we tested for the effects of reduced sample size by conducting the same analyses on a reduced dataset containing only those individual stems that were successfully genotyped 74 in AH and 99 in ATL.

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Alsophila firma | Christopher | Flickr

I, the copyright holder of this work, hereby publish it under the following license:. Contrary to expectations, A. Approx 10 m tall.

This can explain the differences in the estimates firja SGS between the acaulescent C. In general, herbaceous and selfing species tend to have stronger SGS than arboreal and outcrossing species Dutetch et al. There was no evidence of significant levels of homoplasy due to mutation in the five plastid SSRs.

Alsophila firma (Baker) D.S.Conant

We believe that the spatial aggregation of tree ferns is the probable result of clonal growth and limited spore dispersal. In plants with wind dispersion and random mating, the values of observed heterozygosity H O should approach those of gene diversity H S.

Views View Edit History. Contrary to our expectations, an outcrossing breeding system, wind alsophilaa and an arborescent life form did not translate into weak or no SGS.

Map showing geographical location of the two populations in Mexico open circles alsiphila the distribution of cloud forest patches grey. Alsophlia, Permutation tests showed that regression slopes were significantly different from zero in all analyses Table 2. Nuclear and plastid haplotype frequencies per population in two populations of the tree fern Alsophila firma AH: Monophyletic groups and their relationships as revealed by four protein-coding plastic loci.

Spatial genetic structure in continuous and fragmented populations of Pinus pinaster Aiton. However, the presence of pneumathodes may unite the clade, but it is also found in other leptopsporangiate ferns, and may represent the ancestral plesiomorphic condition of this group.