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Chromosome numbers and stomatal cell length in Taraxacum sect. Palustria from Poland

100%

Marciniuk J., Rerak J., Grabowska-Joachimiak A., Jastrzab I., Musial K., Joachimiak A. J.

Acta Biologica Cracoviensia. Series Botanica

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2010

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tom 52

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nr 1

117-121

Chromosome numbers are given for the following species of Taraxacum sect. Palustria from Poland: T. paucilobum Hudziok (2n = 24, 25), T. belorussicum Val. N. Tikhom. (2n = 24), T. subdolum Kirschner & Štěpánek (2n = 24), T. udum Jordan (2n = 24), T. trilobifolium Hudziok (2n = 24), T. bavaricum Soest (2n = 24), T. portentosum Kirschner & Štěpánek (2n = 32), T. vindobonense Soest (2n = 32), and T. brandenburgicum Hudziok (2n = 32). The chromosome numbers of T. belorussicum and T. portentosum are published for the first time, and for T. subdolum, T. bavaricum and T. brandenburgicum for the first time from Poland. The analyzed group of taxa is heterogenous in respect of stomatal size, and after pooling of data the tetraploids show bigger stomata than the triploids.

2

Miscanthus: inter- and intraspecific genome size variation among M. xgiganteus, M. sinensis, M. sacchariflorus accessions

84%

Cichorz S., Goska M., Rewers M.

Acta Biologica Cracoviensia. Series Botanica

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2015

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tom 57

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nr 1

Since M. sinensis Anderss., M. sacchariflorus (Maxim.) Hack. and M. ×giganteus J.M.Greef & Deuter ex Hodk. and Renvoize have considerably the highest potential for biomass production among Miscanthus Anderss. species, there is an urgent need to broaden the knowledge about cytological characteristics required for their improvement. In this study our objectives were to assess the genome size variation among eighteen Miscanthus accessions, as well as estimation of the monoploid genome size (2C and Cx) of the M. sinensis cultivars, which have not been analyzed yet. The characterization of three Miscanthus species was performed with the use of flow cytometry and analysis of the stomatal length. The triploid (2n = 3x = 57) M. sinensis 'Goliath' and M. ×giganteus clones possessed the highest 2C DNA content (8.34 pg and 7.43 pg, respectively). The intermediate 2C-values were found in the nuclei of the diploid (2n = 2x = 38) M. sinensis accessions (5.52–5.72 pg), whereas they were the lowest in the diploid (2n = 2x = 38) M. sacchariflorus ecotypes (4.58–4.59 pg). The presented study revealed interspecific variation of nuclear DNA content (P<0.01) and therefore allowed for recognition of particular taxa, inter- and intraspecific hybrids and prediction of potential parental components. Moreover, intraspecific genome size variation (P<0.01) was observed in M. sinensis cultivars at 3.62%. The values of the stomatal size obtained for the triploid M. ×giganteus 'Great Britain' (mean 30.70 μm) or 'Canada' (mean 29.67 μm) and diploid M. sinensis 'Graziella' (mean 29.96 μm) did not differ significantly, therefore this parameter is not recommended for ploidy estimation.

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Stomata size variability in the Caltha palustris complex [Ranunculaceae] from Poland

84%

Cieslak E., Florjan S.

Acta Biologica Cracoviensia. Series Botanica

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2002

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tom 44

The results of variability analysis of basal leaf epidermis stomata in the Caltha palustris L. complex are presented. Stoma length and width were measured in material from 17 Polish localities. In C. palustris subsp. laeta the stomata are clearly elongated and bigger (mean length 56.52 ± 8.41 µm) than those of subsp. palustris (mean length 46.80 ± 6.73 µm). Within the latter subspecies, in the sample determined as var. radicans they are only slightly longer (mean length 51.46 ± 5.46 µm) than wide (mean width 46.20 ± 5.25 µm), while in var. comuta they are distinctly longer (mean length 52.45 ± 5.17 µm) than wide (mean width 45.00 ± 3.86 µm); both, however, are more circular than in subsp. laeta.

Ograniczanie wyników

3 Acta Biologica Cracoviensia. Series Botanica

1 Cichorz S.

1 Cieslak E.

1 Florjan S.

1 Goska M.

1 Grabowska-Joachimiak A.

1 Jastrzab I.

1 Joachimiak A. J.

1 Marciniuk J.

1 Musial K.

1 Rerak J.

1 Rewers M.

1 2015

1 2010

1 2002

Chromosome numbers and stomatal cell length in Taraxacum sect. Palustria from Poland

Miscanthus: inter- and intraspecific genome size variation among M. xgiganteus, M. sinensis, M. sacchariflorus accessions

Stomata size variability in the Caltha palustris complex [Ranunculaceae] from Poland