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Chromosome numbers in selected species of Hieracium subgenus Pilosella [Asteraceae] from Bulgaria

100%

Vladimirov V. , Szelag Z.

nr 2

Chromosome Numbers in Hieracium and Pilosella (Asteraceae) From Central and Southeastern Europe

86%

Ilnicki T. , Szeląg Z.

Total phenolics variation in leaves of some Hieracium L. and Pilosella Hill. species

86%

Ayaz F. A. , Coskuncelebi K.

tom 44

Mature leaves of 20 Hieracium L. and 11 Pilosella Hill. species collected from the alpine and subalpine regions of northeast Anatolia (Turkey) were examined for total phenolic content. The highest level was found in leaves of H. conicum (22.5 mg phenol equiv/g dry wt) and the lowest H. cardiophyllum (3.7 mg phenol equiv/g dry wt). Total phenolics content varied significantly (p = 0.05) among species of Hieracium and in decreasing order as follows: H. conicum (22.5) > H. hypoglaucum (21.5) > H. amblylepis (18.1) > H. subsilvularum (17 .2) > H. jurassicum (15.1) >H. tamderense (14.8) > H. mannagettae (14.7) > H. cardiophyllum (3 .7). In Pilosella the level ranged between 5.6 and 25.5 mg phenol equiv/g dry wt, with the lowest in P. grossheimii and the highest in P. hypeuryum. Total phenolics content varied significantly (p = 0.05) among species of Pilosella, in decreasing order: P. hypeuryum (22.5) > P. tephrocephala (17.9) > P. officinarum (15.7) > P. macranthum (13.7) > P. fennica (10.5) > P. macrotricha (7.7) > P. grosheimii (5.6). Within genera, 40% of the Hieracium species and ~64% of the Pilosella species significantly differed in total phenolics content, while ~19.4% of the species significantly differed between genera. The range of differences in total phenolics content in the genera was not wide, clearly due to their taxonomically close relationships between species.

Diploid chromosome numbers in Hieracium and Pilosella (Asteraceae) from Macedonia and Montenegro

72%

Szelag Z. , Ilnicki T.

tom 53

nr 2

The authors report the first discovery of diploid populations of Hieracium naegelianum Panè. subsp. naegelianum and H. naegelianum subsp. ljubotenicum Behr & Zahn., and give the first chromosome counts for H. cernuum Friv., H. gymnocephalum Griseb. ex Pant., H. sparsum Friv., Pilosella pavichii (Heuff.) Holub and P. serbica (F. W. Schultz & Schultz-Bip.) Szeląg from Macedonia and/or Montenegro. A diploid chromosome count for Hieracium renatae Szeląg is confirmed based on material from the whole distribution range of the species. An emasculation experiment showed that all the analyzed diploid Hieracium taxa reproduce sexually.

Diploid Chromosome Numbers in Hieracium and Pilosella (Asteraceae) from Macedonia and Montenegro

72%

Szeląg Z. , Ilnicki T.

nr 2