Comparative Anatomical Study of Three Centaurea Species (Asteraceae) from Iraq (original) (raw)
Related papers
2014
This study was carried out to determine the main distinctive morphological, cytological and palynological features of three closely related Centaurea L. taxa (Asteraceae) growing in Turkey: C. aytugiana Bancheva, Kaya et Binzet, C. stenolepis Kerner and C. salicifolia M. Bieb. ex Willd. The first species, recently described from Karabuk province, Turkey (Bancheva et al. 2014), is an endemic of Karabuk province, whereas the remaining taxa have larger distribution ranges. The results show that the morphological (including pollen-morphological) traits and chromosome numbers proved to be of high diagnostic value and are very useful for determination.
Turkish Journal of Botany, 2013
Seven Centaurea L. s.l (Asteraceae) taxa endemic to Turkey were examined in terms of anatomical and molecular aspects to contribute to their taxonomic positions. Numerical analysis of the 13 anatomical traits showed that average row number of collenchyma and the arrangements of the vascular bundles in the stem, leaf type, and abaxial surface of leaf epidermal tissue were important to determine the investigated taxa. It was also found that the 7 investigated taxa were grouped into 2 distinct clusters based on anatomical traits and combined nrDNAITS/cpDNA data.
Pakistan Journal of Botany, 2010
In this study, morphological, anatomical and palynological properties of Centaurea calcitrapa L. ssp. cilicica (Boiss. & Bal.) Wagenitz and C. solstitialis L. ssp. carneola (Boiss.) Wagenitz which are endemic for Turkey were investigated. In the morphological studies, the properties of these endemic subspecies were determined and measurements made on the materials and compared with floristic-systematical references. The morphology of capitula, involucra, involucral leaves (phyllaries) and achene have been investigated. In the anatomical studies; the transverse sections were taken from the root, stem, phyllaries and leaves of the subspecies. In the palynological researches Polar diameter, equatorial length and apertures were measured in detailed. Microphotographs of pollen and anatomical structures are also presented.
Centaurea shahuensisandC. ravansarensisspp. nov. (Asteraceae, Cardueae) from west Iran
Nordic Journal of Botany, 2013
Two new species of Centaurea L. sect. Cynaroides Boiss. ex Walp. (Asteraceae), C. shahuensis Ranjbar and Negaresh and C. ravansarensis Ranjbar and Negaresh are described and illustrated from Kermanshah Province, west Iran. Th ey are closely related to C. regia Boiss. subsp. regia. However, C. shahuensis diff ers from it by median stem leaves broadly oblanceolate or subpandurate, phyllaries densely lanate-tomentose, appendages small, concealing a minor part of phyllaries, and also median appendage margin entire sometimes with 1-2 cilia, 1.2-3.0 mm long on each side. Centaurea ravansarensis is distinguished by upper stem leaves loosely arachnoid, phyllaries loosely fl occose-tomentose, inner appendages deep brown to blackish, and spine 4.5-6.0 mm long. Habitat, conservation status and the geographical distribution of the new species are given. Centaurea L. s.l. is one of the largest genera of the family Asteraceae. Among the more challenging taxonomic problems persisting in the Asteraceae is the delimitation of the genus Centaurea. Depending on the adopted classifi cation,
Karyomorphological Study of Eight Centaurea L. Taxa (Asteraceae) from Turkey
Turkish Journal of Botany, 2009
Centaurea L. (Asteraceae) is one of the largest genera in Turkey. The chromosome number and morphology of 8 taxa belonging to the genus Centaurea were investigated using an image analysis system. Among these taxa, the chromosome numbers were as follows: 2n = 18 in C. cariensis Boiss. subsp. niveotomentosa (Hub.-Mor.) Wagenitz, C. lycaonica Boiss. & Heldr., C. virgata Lam., and C. polyclada DC.; 2n = 24 in C. cyanus L.; 2n = 36 in C. virgata and C. cariensis Boiss. subsp. cariensis: 2n = 40 in C. urvillei DC. subsp. urvillei; 2n = 54 in C. tuzgoluensis Aytaç & H.Duman. In 5 taxa mixoploidy was observed (C. lycaonica, C. urvillei subsp. urvillei, C. cariensis subsp. cariensis, C. virgata, and C. tuzgoluensis). Based on karyotypic data for this genus, 3 basic chromosome numbers in Centaurea taxa were observed (x = 9, 10, and 12). Furthermore, ideograms are given for all the Centaurea taxa studied.
A new species of Centaurea (Asteraceae) from East Anatolia, Turkey
Phytotaxa, 2016
Centaurea malatyensis Ş. Kültür & M. Bona sp. nova (Asteraceae) is described as new to science from East Anatolia (B6: Malatya: Turkey). It is morphologically similar to C. leptophylla but differs mainly in its stem, basal and cauline leaf shape and size, achene, pappus and phyllary appendages. The geographical distribution of the new species and its relatives is mapped. The ecology and conservation status of the new species is also presented. Micromorphological structures of achenes of C. malatyensis and C. leptophylla are examined by SEM.
A revision of Centaurea sect. Centaurea (Asteraceae) from Iran
TURKISH JOURNAL OF BOTANY, 2014
Introduction Subtribe Centaureinae (Asteraceae-Cardueae), centered mainly in the Mediterranean region (Wagenitz, 1986; Meusel and Jäger, 1992), contains about 31 genera with around 800 species (Hellwig, 2004). A wide array of growth and life forms are known among Centaureinae, ranging from tall shrubs to small annuals, the majority being polycarpic perennial herbs or monocarpic biennials (Hellwig, 2004). Following the progression in taxonomy, numerous taxonomic changes and rearrangements have been proposed in the genera of the subtribe Centaureinae (Garcia
A contribution to Centaurea sect. Acrocentron (Asteraceae) from Iran
Phytotaxa, 2013
Centaurea sanandajensis is described and illustrated as a new species from Kurdestan Province, W Iran. The characters that distinguish the new species from its nearest relative C. longipedunculata are given. In addition, C. elegantissima is reported as new to Iran, and its chromosome number (2n = 2x = 22) is counted for the first time. The description of C. elegantissima is completed with the characters of mature achenes, and its differences from the nearest relative C. kandavanensis are summarized. The geographical distribution of discussed species is presented.
A contribution to Centaurea sect. Acrocentron (Asteraceae
2013
Centaurea sanandajensis is described and illustrated as a new species from Kurdestan Province, W Iran. The characters that distinguish the new species from its nearest relative C. longipedunculata are given. In addition, C. elegantissima is reported as new to Iran, and its chromosome number (2n = 2x = 22) is counted for the first time. The description of C. elegantissima is completed with the characters of mature achenes, and its differences from the nearest relative C. kandavanensis are summarized. The geographical distribution of discussed species is presented.