Pine genome size diversity and water relations

Wakamiya, Izumi; Price, H. James; Messina, Michael; Newton, Ronald J.

doi:10.1111/j.1399-3054.1996.tb00177.x

Cited by 24 publications

(6 citation statements)

References 35 publications

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“…The 2C DNA values for P. heldreichii (50-55 pg, according to Murray 1998) fall in the top end of the range found for Pinaceae. This is perhaps not surprising, following the hypothesis of possible adaptation to environmental conditions, especially to xeric habitats (Wakamyia et al 1993(Wakamyia et al , 1996Ohri and Khoshoo 1986). Populations of P. heldreichii pine occupy the most extreme habitats in alpine and subalpine regions where water stress appears to be very frequent.…”

Section: Resultsmentioning

confidence: 83%

Genome size and base composition of five Pinus species from the Balkan region

et al. 2003

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The 2C DNA content and base composition of five Pinus (2 n=24) species and two Pinus subspecies from the Balkan region have been estimated by flow cytometry. P. heldreichii (five populations) and P. peuce (one population) were assessed for the first time, as also were subspecies of P. nigra (three populations-two of subspecies nigra and one of subspecies dalmatica) along with P. sylvestris, and P. mugo from the same region. The 2C DNA values of these Pinus ranged from 42.5 pg to 54.9 pg (41.7-53.8 x 10(9)bp), and the base composition was quite stable (about 39.5% GC). Significant differences were observed between two subspecies of P. nigra and even between two populations of subsp. nigra. The two other species (P. sylvestris and P. mugo) had 2C values of 42.5 pg and 42.8 pg, respectively, while that of P. peuce was 54.9 pg. These genome sizes are in accordance with published values except for P. sylvestris, which was 20% below estimates made by other authors.

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Section: Resultsmentioning

confidence: 83%

Genome size and base composition of five Pinus species from the Balkan region

et al. 2003

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“…Increase in genome size is associated with a number of phenotypic traits, the most universal of which are nuclear and cell enlargement, retardation of cell cycle and development, and reduction of metabolic rate ( Van't Hof and Sparrow 1963;Bennett 1971Bennett , 1987Bennett , 1998Cavalier-Smith 1978Olmo 1983Olmo , 2003Szarski 1983;Vinogradov 1995aVinogradov , 1997Gregory 2002a;Waltari and Edwards 2002;Kozlowski et al 2003;Vinogradov and Anatskaya 2004). Among indications of the adaptive nature of accumulation of noncoding DNA in the genome are increased cold, frost and desiccation resistance in plants with larger genomes (Grime and Mowforth 1982;Grime et al 1985;Macgillivray and Grime 1995;Wakamiya et al 1993Wakamiya et al , 1996, and enargement of the genome in terrestrial pulmonate mollusks compared with their aquatic relatives. The last parallels the corresponding event in the vertebrates (amphibians and lungfishes) and suggests that these enlargements are not accidental (Vinogradov 2000).…”

Section: Introductionmentioning

confidence: 98%

Genome size and chromatin condensation in vertebrates

Vinogradov

2005

Chromosoma

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Cell membrane-dependent chromatin condensation was studied by flow cytometry in erythrocytes of 36 species from six classes of vertebrates. A positive relationship was found between the degree of condensation and genome size. The distribution of variances among taxonomic levels is similar for both parameters. However, chromatin condensation varied relatively more at the lower taxonomic levels, which suggests that the degree of DNA packaging might serve for fine-tuning the 'skeletal' and/or 'buffering' function of noncoding DNA (although the range of this fine-tuning is smaller than the range of genome size changes). For two closely related amphibian species differing in genome size, change in chromatin condensation under the action of elevated extracellular salinity was investigated. Condensation was steadier and its reaction to changes in solvent composition was more inertial in the species with a larger genome, which is in agreement with the buffering function postulated for redundant DNA. The uppermost genome size in vertebrates (and in living beings in general) was updated using flow cytometry and was found to be about 80 pg (78,400 Mb). The widespread opinion that the largest genome occurs in unicellular organisms is rejected as being based on artifacts.

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“…At present very little is truly understood about most of these connections between adaptation and genomic organization, although a great deal of attention has been given to possible correlations between genome size and various life-history features. These include traits such as cell volume [3,46,47], endopolyploidy [48], leaf size [49][50][51][52], annual/weedy lifestyle [53][54][55], cell cycle duration [56], drought tolerance [49,51,57], frost tolerance [58], and altitude [59].…”

Section: Genome Size and The Organismmentioning

confidence: 99%

Phylogenetic Insights Into the Pace and Pattern of Plant Genome Size Evolution

Grover

Hawkins²,

Wendel³

2008

Plant Genomes

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It has long been known that organismal complexity is poorly correlated with genome size and that tremendous variation in DNA content exists within many groups of organisms. This diversity has generated considerable interest in: (1) the identity and relative impact of sequences responsible for genome size variation, and (2) the suite of internal mechanisms and external evolutionary forces that collectively are responsible for the observed diversity. Genome size in any given taxon reflects the net effects of multiple mechanisms of DNA expansion and contraction, which by virtue of their complexity and temporal juxtaposition, may be challenging to tease apart into their constituent contributions. Here we review our current understanding of genome size variation in plants and the spectrum of mechanisms thought to be responsible for this variation. We present a synopsis of the insights into the mechanisms and pace of genome size change that are uniquely facilitated by a phylogenetic perspective, particularly among closely related species. We also highlight recent studies in diverse angiosperm groups where comparative genomic approaches have yielded general insights into the myriad mechanisms responsible for much of the observed genome size variation, most prominently the contribution of transposable elements (TEs). Finally, we draw attention to the possibility of divergence in the relative importance of different mechanisms of genome size evolution during cladogenesis.

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Pine genome size diversity and water relations

Cited by 24 publications

References 35 publications

Genome size and base composition of five Pinus species from the Balkan region

Genome size and base composition of five Pinus species from the Balkan region

Genome size and chromatin condensation in vertebrates

Phylogenetic Insights Into the Pace and Pattern of Plant Genome Size Evolution

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