Karyological and palynological studies on Astragalus hamosus and A. glycyphyllos in Turkey (original) (raw)
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Karyotype analyses of four Astragalus L.(Fabaceae) species from Turkey
2008
Astragalus L. is a perennial herbaceous genus belonging to the family Fabaceae. Chromosome morphology was defined for the first time in four species of Astragalus namely; A. antalyensis A.Duran & Podlech, A. nezaketae A.Duran & Aytaç, A. cariensis Boiss. & A. schizopterus Boiss. All species contained diploid chromosome numbers of 2n = 16. However, polyploid cells (4x = 32) were also observed in A. schizopterus and A. antalyensis. Astragalus nezaketae species had two double satellite chromosomes. Karyotypes of species were made using an Image Analysis System. Chromosome numbers are all first reports, except for that of A. schizopterus.
Karyological studies of eightCarduusL. (Asteraceae, Cardueae) taxa from Turkey
Caryologia, 2016
The somatic chromosome numbers and detailed morphometric properties of 18 specimens belonging to eight taxa (six species) of genus Carduus L. distributed in Turkey were examined. The somatic chromosome numbers were determined as 2n = 2x = 22 in C. olympicus Boiss. subsp. hypoleucus (Bornm.) P. H. Davis, C. tmoleus Boiss. subsp. tmoleus and C. acanthoides L. s.l.; 2n = 2x = 18 in C. candicans Waldst. & Kit. s.l. and 2n = 2x = 16 in C. nutans L. subsp. falcato-incurvus P. H. Davis (2798). In addition, tetraploid chromosome numbers (2n = 4x = 32) were also observed in C. nutans subsp. falcato-incurvus (2737) and C. onopordioides Fisch. ex M. Bieb. subsp. turcicus (Kazmi) P. H. Davis. Karyotype analysis indicated that chromosomes of Carduus taxa generally have median region (m) and submedian region (sm) karyotypes. A median point (M) karyotypes is found in C. acanthoides subsp. acanthoides (2728). Secondary structures and one to three pairs of satellite chromosomes (sat-chromosome) were observed in some of the examined specimens. The findings for each of the analysed taxa are compared with the results of previous studies. The chromosome number and morphology of C. olympicus subsp. hypoleucus, C. nutans subsp. falcato-incurvus, C. onopordioides subsp. turcicus, C. candicans subsp. globifer and C. acanthoides subsp. sintenisii are reported here for the first time.
Chromosome number reports in Astragalus sect. Onobrychoidei (Fabaceae) from Iran
2015
In this study, original mitotic chromosome counts have been presented for 10 populations belonging to 6 species of Astragalus sect. Onobrychoidei: A. aduncus, A. arguricus, A. cancellatus, A. lilacinus and A. vegetus. All taxa were diploid and possessed 2n = 2x = 16 chromosome number, consistent with the proposed base number of x = 8. In addition, meiotic studies revealed chromosome number of 2n = 2x = 16 for A. aduncus21 and A. brevidens and also 2n = 4x = 32 for A. vegetus99. Although this taxon displayed regular bivalent pairing and chromosome segregation at meiosis, some abnormalities were observed.
Studies of the morphology of chromosomes of some selected species
Folia Geobotanica et Phytotaxonomica, 1977
K~ryotypes of twelve species from twenty-four localities in southern Moravia a n d one locality in Slovakia were investigated. Their counts or karyotypic formulae are as follows: Chenopodium foliosum (MoENCH) ASCHERSON: K (2n) = 18 = 16 A m + 2 B am ; Astragalus austriacus J'ACQ.: K (2 n) ~ 16 ~ 8 A m + 8 B s m ; Astragalus exscapus L.: K (2 n) = 16 = 1 0 A m + 4 B s m + + 2 Cst; Astragalus cicer L.: K (2n) = 64; Astragalus onobrychis L.: K (2n) = 64 a n d K (2n) 64 + 1; Vicia dumetorum L.: K (2 n) ~ I4 = 1 0 A m + 4 B s m ; Vicia sylvatica L.: K (2 n) = ~ 1 4~2 A r a + 1 0 B s m + 2Cst; Vicia pisiformi8 L.: ]~(2 n)~ 1 2~S A m + 4 B s m ; V~cia cassubica L.: K (2 n) ~ 12 ~ 4 A m + 6 B s m + 2Cst; Vicia cracca L. (from five localities in s o u t h e r n Moravia): K (2n) = 28 ~ 4 A TM + 12 Bsm + 12 C st and K (2n) = 28 + 1 ~ 5 A m + + 12 B sm + 12 Cat; Vicia cracca L. (from one locality in Slovakia): K (2n)-14 = 2 A m + + 6 B s m + 6Cat; Vicia tenulfolia ROTH: K (2 n) = 24 = 4 A m + 16B s m + 4Cst; Serratula 9 m# I,, 2 4t.. %.
Caryologia, 2006
In the present paper, we reported the chromosome numbers and karyotypes of five Hieracium species (H.medianiforme (Litw.et Zahn) Juxip, H. karagoellense (Zahn) Sell&West, H. argillaceoides (Litw.et Zahn) Juxip, H. asterodermum (Woronow &Zahn) Juxip, H. umbellatum L.) from Turkey. Among them, three are tetraploid with 36 somatic chromosomes and one triploid with 27 chromosomes, and the other one diploid with 18 chromosomes, respectively. The basic number x = 9 was confirmed for all of them and their karyotypes consist mainly of metacentric and submetacentric chromosomes. Chromosome morphologies of four species were firstly reported.
Chromosome Numbers and Karyotypes in ASTERACEAE1
Annals of the Missouri Botanical Garden, 2007
Chromosome numbers were determined from microsporocytes (meiotic counts) and root-tip cells (mitotic counts) in 201 collections of 51 genera and 119 specific and infraspecific taxa belonging to nine tribes of Asteraceae and Acicarpha spathulata R. Br. of Calyceraceae from Australia, Bolivia, Brazil, Chile, Mexico, and the United States. These include the first reports and new numbers for the basal members of the Barnadesieae and Mutisieae. First reports are provided for 45 taxa, including five genera, Dasyphyllum HBK (2n 5 54), Dithyrostegia A. Gray (2n 5 14), Epitriche Turcz. (2n 5 10), Revealia R. M. King & H. Rob. (2n 5 22), and Stifftia J. C. Mikan (2n 5 54). In addition, new chromosome numbers are established at the generic level in the genera Barnadesia Mutis (2n 5 54), Eremanthus Less. (2n 5 34, 30), Macvaughiella R. M. King & H. Rob. (2n 5 24), and Trichocline Cass. (2n 5 38), and in 12 additional species. Remaining counts augment and agree with previously reported determinations. The base chromosome numbers of Calyceraceae and Asteraceae are discussed in published records and our original counts.
Caryologia, 2018
The chromosome number and karyotype analysis of nine species (10 taxa) of genus Cirsium Mill. distributed in Turkey were analyzed. The somatic chromosome number of Cirsium sipyleum O. Schwarz, C. candelabrum Griseb., C. creticum d'Urv. subsp. creticum, C. elodes M. Bieb., C. subinerme Fisch. & C. A. Mey., C. leucopsis DC., C. libanoticum DC. subsp. arachnoideum P. H. Davis & Parris and C. arvense (L.) Scop. were determined as 2n=2x=34. Cirsium pubigerum DC. var. caniforme Petr. and var. paphlagonicum Petr. showed 2n=4x=68 chromosome numbers. The chromosomes of the examined taxa predominantly have median region (m) and rarely median point (M) and submedian region (sm) karyotypes. The chromosome number and morphology of Cirsium sipyleum, C. pubigerum var. paphlagonicum, C. leucopsis and C. libanoticum subsp. arachnoideum are newly reported in the present study.
Chromosome numbers of species of the genusJurineaCass. (Asteraceae) in Turkey
Caryologia, 2009
Chromosome numbers of 13 Jurinea species, collected from different localities in Turkey, were determined for the first time. All the Jurinea species investigated were diploid with chromosome numbers counted as 2n = 34. The basic chromosome number of the genus was x = 17. In this study, polyploidy was determined in nine taxa of Jurinea. Polyploid cells were 2n = 4x = 68 and they were tetraploid. The mitotic metaphase plates were given all the taxa of Jurinea. The research has made contribution to the cytotaxonomic revision of the genus Jurinea in Turkey.