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The Physcomitrella Genome Reveals Evolutionary Insights into the Conquest of Land by Plants
TLDR
This comparison reveals genomic changes concomitant with the evolutionary movement to land, including a general increase in gene family complexity; loss of genes associated with aquatic environments; acquisition of genes for tolerating terrestrial stresses; and the development of the auxin and abscisic acid signaling pathways for coordinating multicellular growth and dehydration response.
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Science as a Process: An Evolutionary Account of the Social and Conceptual Development of Science, David L. Hull. 1988. The University of Chicago Press, Chicago, IL. 608 pages. ISBN: 0-226-35060-4.…
"Legend is overdue for replacement, and an adequate replacement must attend to the process of science as carefully as Hull has done. I share his vision of a serious account of the social and…
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The perils of DNA barcoding and the need for integrative taxonomy.
TLDR
In the debate that accompany this article, Will and Hebert respond to 10 questions selected by the PEET audience, the promise of DNA barcoding for taxonomy is described as a useful tool for taxonomists.
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The evolution of vegetative desiccation tolerance in land plants
TLDR
It is hypothesize that the mechanism of desiccation tolerance exhibited in seeds, a developmentally induced cellular protection system, evolved from the primitive form of vegetative desICcation tolerance, which was established in seeds by environmental cues related to drying.
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Phylogenetic measures of biodiversity and neo- and paleo-endemism in Australian Acacia.
TLDR
This work proposes a new method called categorical analysis of neo- and paleo-endemism (CANAPE) that allows, for the first time, a clear, quantitative distinction between centres of Neo- and Paleo- endemism, useful to the conservation decision-making process.
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Desiccation Tolerance in Bryophytes: A Reflection of the Primitive Strategy for Plant Survival in Dehydrating Habitats?1
TLDR
A new phylogenetic analysis suggests that the basic mechanisms of tolerance seen in modern day bryophytes have changed little from the earliest manifestations of desiccation tolerance in land plants, and vegetative desiccence tolerance in the early land plants may have evolved from a mechanism present first in spores.
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Complete plastome sequences of Equisetum arvense and Isoetes flaccida: implications for phylogeny and plastid genome evolution of early land plant lineages
TLDR
Results from this study demonstrate resolution among the four monilophytes lineages, albeit with moderate support; and posit a clade consisting of Equisetaceae and Psilotaceae that is sister to the "true ferns," including Marattiaceae.
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Desiccation-tolerance in bryophytes: a review
Abstract Desiccation-tolerance (DT), the ability to lose virtually all free intracellular water and then recover normal function upon rehydration, is one of the most remarkable features of…
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Functional Constraints and rbcL Evidence for Land Plant Phylogeny
Although the proportion of «functional» DNA in eukaryotic genomes is both debatable and subject to definition, most sequences gathered for phylogenetic purposes are indisputably functional. For…
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Phylogenetic relationships of the liverworts (Hepaticae), a basal embryophyte lineage, inferred from nucleotide sequence data of the chloroplast gene rbcL.
TLDR
Maximum likelihood and parsimony analyses of chloroplast-encoded gene rbcL data confirm hypotheses based on morphological data, such as the paraphyly of bryophytes, and the basal position of liverworts, as well as corroborate the deep separation between the complex thalloid and leafy/simple thalloids implied by morphology data.
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