Genomic Clues to the Ancestral Flowering Plant

  title={Genomic Clues to the Ancestral Flowering Plant},
  author={Keith L. Adams},
  pages={1456 - 1457}
  • K. Adams
  • Published 20 December 2013
  • Biology
  • Science
The genome sequence of Amborella trichopoda provides insights into the molecular evolution of flowering plants. [Also see Research Articles by Amborella Genome Project and Rice et al.] Amborella trichopoda is an understory shrub that is endemic to New Caledonia (see the figure). It is an early-diverging flowering plant—most phylogenetic studies indicate that it diverged from the lineage leading to most flowering plants, and it is the single sister species to all other extant angiosperms (1). As… 

A mborella – Bearing Witness to the Past?

While Amborella likely retained some ancestral traits, critical character reconstructions have also highlighted some derived and sometimes unique characters in this species.

The chromosome-scale reference genome of black pepper provides insight into piperine biosynthesis

The authors assemble the reference genome of this species and analyze gene families associated with piperine biosynthesis and shed light on the metabolic processes relevant to the molecular basis of species-specific piperin biosynthesis.

The role of ABC genes in shaping perianth phenotype in the basal angiosperm Magnolia.

Magnolia genus is capable of forming, in some species, a perianth differentiated into a calyx (sepals) and corolla (petals), even though no clear gradient of morphological changes could be observed.

Bayesian molecular clock dating and the divergence times of angiosperms and primates

This analysis demonstrates that even though many sources of uncertainty are explored, attempts to control for these factors still do not bring clock estimates and earliest confident fossil occurrences into agreement, highlighting that more room for improvement might lie in refining the knowledge and use of fossil calibrations, the resulting improvements to molecular estimates of timescales will lead to a better understanding of angiosperm evolution.

Fan-shaped Spectrums of Species and Paleopolyploidy for Crossbreeding Evolution

Although Darwin‘s evolutionary mutation theory has been widely accepted, many endeavors tried to challenge it. With more and more observation of successful hybridization and hybrids, the sexual

Fan-shaped Spectrums of Species and Paleopolyploidy for Foundation of Crossbreeding Evolution

Although Darwin‘s evolutionary mutation theory has been widely accepted, many endeavors tried to challenge it. With more and more observation of successful hybridization and hybrids, the sexual

Transcriptional analysis of salt shock in Brassica oleracea.

A large microarray experiment was performed during this project and a wealth of potential gene targets for future study and germplasm that can be used in the development of stress tolerant B. oleracea varieties are provided.

Elucidating gene function and function evolution through comparison of co-expression networks of plants

It is hypothesized that in comparison to simple co-expression analysis, comparative analysis would yield more accurate gene function predictions, and a possible composition of cellulose biosynthesis machinery during earlier stages of plant evolution is proposed.

Mining in New Caledonia: environmental stakes and restoration opportunities

Past and ongoing experiences in the restoration of New Caledonian terrestrial ecosystems and Ecocatalysis, an innovative approach to make use of metal hyperaccumulating plants, is of particular interest.



Horizontal Transfer of Entire Genomes via Mitochondrial Fusion in the Angiosperm Amborella

A fusion-compatibility model is proposed to explain the findings, with Amborella capturing whole mitochondria from diverse eukaryotes, followed by mitochondrial fusion (limited mechanistically to green plant mitochondria) and then genome recombination.

Assembly and Validation of the Genome of the Nonmodel Basal Angiosperm Amborella

A strategy that uses NGS, fluorescence in situ hybridization, and whole-genome mapping to assemble a high-quality genome sequence for Amborella trichopoda, a nonmodel species crucial to understanding flowering plant evolution, and are applicable to many other organisms with limited genomic resources.

Ancestral polyploidy in seed plants and angiosperms

Comprehensive phylogenomic analyses of sequenced plant genomes and more than 12.6 million new expressed-sequence-tag sequences from phylogenetically pivotal lineages are used to elucidate two groups of ancient gene duplications, implicating two WGDs in ancestral lineages shortly before the diversification of extant seed plants and extant angiosperms.

Massive horizontal transfer of mitochondrial genes from diverse land plant donors to the basal angiosperm Amborella.

Results indicate that Amborella has acquired one or more copies of 20 of its 31 known mitochondrial protein genes from other land plants, for a total of 26 foreign genes, whereas no evidence for HGT was found in the five sequenced genomes.

Gamma paleohexaploidy in the stem lineage of core eudicots: significance for MADS-box gene and species diversification.

Detailed phylogenies of subfamilies of MADS-box genes suggest that the gamma triplication has occurred before the divergence of Gunnerales but after the divergence of Buxales and Trochodendrales, and it is considered that the traits generated from this potential characterize extant core eudicots both chemically and morphologically.

Angiosperm phylogeny: 17 genes, 640 taxa.

It is confirmed that with large amounts of sequence data, most deep-level relationships within the angiosperms can be resolved and will be of broad utility for many areas of biology, including physiology, ecology, paleobiology, and genomics.

Routes to cellulosic ethanol

Routes to Cellulosic Ethanol The role of biomass in the world's energy system Jose Goldemberg Bioenergy and the Sustainable Revolution and the role of microorganisms used for degradation of plant cell wall and bioenergy production are discussed.

The Amborella Genome and the Evolution of Flowering Plants

Genome structure and phylogenomic analyses indicate that the ancestral Angiosperm was a polyploid with a large constellation of both novel and ancient genes that survived to play key roles in angiosperm biology.

A genome triplication associated with early diversification of the core eudicots

The rapid radiation of core eudicot lineages that gave rise to nearly 75% of angiosperm species appears to have occurred coincidentally or shortly following the gamma triplication event.