Recherches biosystématiques sur la SectionJacea Cass. et quelques sections voisines du genreCentaurea L. en France et dans les régions limitrophes

Gardou, C.

doi:10.1002/fedr.4910830502

Feddes Repert

1972

DOI: 10.1002/fedr.4910830502

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Recherches biosystématiques sur la SectionJacea Cass. et quelques sections voisines du genreCentaurea L. en France et dans les régions limitrophes

C. Gardou¹

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1996

2005

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Cited by 2 publications

References 26 publications

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Nuclear DNA Content and Chromosome Number in Some Diploid and Tetraploid Centaurea (Asteraceae: Cardueae) from the Dalmatia Region

Šiljak-Yakovlev

Šolić²,

Catrice

et al. 2005

Plant Biology

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Given the paucity of information about genome size in the genus Centaurea, nuclear DNA content of 15 Centaurea taxa, belonging to four subgenera and six different sections, has been investigated for the first time. The sample concerns 21 populations from the Dalmatia region of Croatia. The 2C DNA content and GC percentage were assessed by flow cytometry and chromosome number was determined using standard methods. Genome size of studied Centaurea ranged from 2C=1.67 to 3.72 pg. These results were in accordance with chromosome number and especially with ploidy level that varies throughout this group; 2C DNA values ranged from 1.67 to 3.43 pg for diploid, and from 3.19 to 3.72 for polyploid taxa. No significant intraspecific variations of DNA amount were found between two subspecies of C. visiani and C. ragusina, nor between two varieties of C. gloriosa. However, some populations of C. glaberrima and C. cuspidata showed a significant difference in DNA amount. Three different basic chromosome numbers were observed in studied species (x=9, 10, and 11). The most frequent basic number was x=9. C. rupestris, C. ragusina ssp. ragusina, and C. r. ssp. lungensis possessed x=10 and C. tuberosa x=11. The species with a basic chromosome number of x=9 had a small genome size and the smallest chromosomes (on average 0.09 to 0.12 pg/chromosome) but frequently present polyploidy. Centaurea ragusina ssp. ragusina and C. r. ssp. lungensis had a mean base composition 41.3% GC.

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Nuclear DNA Content and Chromosome Number in Some Diploid and Tetraploid Centaurea (Asteraceae: Cardueae) from the Dalmatia Region

Šiljak-Yakovlev

Šolić²,

Catrice

et al. 2005

Plant Biology

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Estudio fitodermológico e histología foliar de algunas Artemisias de la cuenca del Mediterráneo Occidental

Ouyahya¹

1996

abm

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Se ha estudiado por medio del microscopio electrónico y del miscroscopio electrónico de barrido la fitodermología de 27 taxa del género Artemisia presentes en la cuenca mediterránea occidental. El estudio se orienta, principalmente, en la descripción de la epidermis observada de plano y de sección, en los tipos de estomas, y de los pelos tectores de ambas caras de las hojas caulinares, así como su valor taxonómico. Las características de la epidermis foliar son objeto de una discusión preliminar en relación con la ecología de los taxa estudiados.

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Recherches biosystématiques sur la SectionJacea Cass. et quelques sections voisines du genreCentaurea L. en France et dans les régions limitrophes

Cited by 2 publications

References 26 publications

Nuclear DNA Content and Chromosome Number in Some Diploid and Tetraploid Centaurea (Asteraceae: Cardueae) from the Dalmatia Region

Nuclear DNA Content and Chromosome Number in Some Diploid and Tetraploid Centaurea (Asteraceae: Cardueae) from the Dalmatia Region

Estudio fitodermológico e histología foliar de algunas Artemisias de la cuenca del Mediterráneo Occidental

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