Showing papers on "Dryopteris published in 2003"
TL;DR: This work reports the first evidence for genetic segregation in the progeny of apogamous fern species Dryopteris nipponensis, where five progeny showed different genotypes from that of the parent.
Abstract: Segregation of genotypes through homoeologous chromosome pairing in the apogamous species Dryopteris nipponensis was tested by electrophoretic analysis. Of 284 progeny examined (250 gametophytes and 34 sporophytes), from the parental sporophyte with the Pgi-2 genotype abc, five showed different genotypes from that of the parent (three aac, one bbc and one bcc). This is the first evidence for genetic segregation in the progeny of apogamous fern species.
15 citations
Journal Article•
TL;DR: The paper reports the results of karyological studies on seven fern species from the Polish Carpathians, reported for the first time from Poland, whose chromosome numbers counted in root tip mitoses match those reported from other countries.
Abstract: The paper reports the results of karyological studies on seven fern species from the Polish Carpathians. Their chromosome numbers counted in root tip mitoses are reported for the first time from Poland. The specimens originated from the Tatra Mts and Pieniny range. Chromosome numbers were established for Asplenium viride (2n = 72), Athyrium filix-femina (2n = 80), Dryopteris filix-mas (2n = 164), Gymnocarpium dryopteris (2n = 160), Gymnocarpium robertianum (2n = 160), Phegopteris connectilis (2n = 90) and Phyllitis scolopendrium subsp. scolopendrium (2n = 72). The chromosome numbers from the Polish material match those reported from other countries. Information on the distribution and habitats of the investigated fern species is also provided.
13 citations
Journal Article•
TL;DR: The resources of genus Dryopteris are very abundant in China and chemical studies should be closely combined with pharmacological screening.
Abstract: Objective:To review the chemical studies progress of genus Dryopteris. Methods:To review the types of compounds,and their structures,isolation and identification from the reference.Results:58 Phloroglucinol derivatives,13 terpenoids and 4 flavonoids were isolated and identified from plants of genus Dryopteris.Conclusion:The resources of genus Dryopteris are very abundant in China.To full use of this resource,the chemical studies should be closely combined with pharmacological screening.
9 citations
TL;DR: Dryopteris katangaensis, a new species endemic to the Katango–Zambian centre of endemism (Congo-Zambezi watershed) in Zambia and the Democratic Republic of Congo is described and illustrated.
5 citations