Mehmet Ufuk ÖZBEK, Funda ÖZBEK, Mecit VURAL

Achene morphology of the genus Cota J.Gay (Asteraceae) from Turkey and its taxonomic significance

Twenty-two taxa of the genus Cota J.Gay (Asteraceae) from Turkey were examined with a stereomicroscope and scanning electron microscope (SEM) in order to describe their achene macro- and micromorphologies and to evaluate the diagnostic value of these features. The achenes are obpyramidal, obconical, and oblong. Achene width ranges from 0.26 to 1.68 mm and achene length from 1.13 to 3.46 mm. They show variation in color: brown, dark brown, grayish-brown, reddish-brown, purplish-brown, black, and purplish. All investigated species have slime cells, but prismatic cells on epicarpic cells are found only in two species. Four types of ornamentations were recognized via SEM on achene surface characteristics: reticulate-striate-ruminate, reticulate-striate, reticulate-ruminate, and reticulate-rugose. Achene size, surface ornamentation, and color are of significant importance in taxonomy of the genus for distinguishing taxa from each other.

Keywords:

Compositae, Cota fruit, macro-/micromorphology, systematics,

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Abid R, Qaiser M (2009). Taxonomic significance of the cypsela morphology in the tribe Anthemideae (Asteraceae) from Pakistan and Kashmir. Pak J Bot 41: 555-579.
Abid RD, Zehra N (2007). Micromorphology of cypsela and its taxonomic significance of some genera in the tribe Inuleae from Pakistan. Pak J Bot 39: 1407-1416.
Akçin TA, Akçin A (2014). Achene micromorphology of seven taxa of Achillea L. (Asteraceae) from Turkey. Bangl J Plant Taxon 21: 19-25.
Barthlott W (1981). Epidermal and seed surface characters of plants: systematic applicability and some evolutionary aspects. Nord J Bot 1: 345-355.
Bhar I, Mukherjee SK (2004). Macromorphological and micromorphological study of cypselas in seven species of the tribe Anthemideae- (Asteraceae). J Econ Taxon Bot 28: 788- 794.
Bona M (2015). Systematic implications of achene characteristics in genera Centaurea L., Cyanus Mill., Psephellus Cass. and Rhaponticoides Vaill. (Asteraceae). Bangl J Plant Taxon 22: 125-136.
Boyko EV (1985). On the systematics of Artemisia aurata and Artemisia palustris (Asteraceae). Botanicheskii Zhurnal 70: 923-925.
Briquet J (1916). Etudes carpologiques sur les genres de Composées Anthemis , Ormenis et Santolina . Annuaire du Conservatoire et du Jardin Botaniques de Genève 18-19: 257-313.
Candan F, Uysal T, Tugay O, Bozkurt M, Ertuğrul K, Demirelma H (2016). The examinations of achene ultrastructural features of section Acrolophus ( Centaurea , Asteraceae) via scanning electron microscopy. Turk J Bot 40: 147-163.
Chehregani A, Mahanfar N (2007). Achene micro-morphology of Anthemis (Asteraceae) and its allies in Iran with emphasis on systematics. Int J Agric Biol 9: 486-488.
Coşkunçelebi K, Makbul S, Okur S (2016). Studies on the achene morphology of Turkish species of Scorzonera L. (Asteraceae) using light and scanning electron microscopy. Phytotaxa 247: 1-26.
Davis PH, Hedge IC (1975). The Flora of Turkey; past, present and future. Candollea 30: 331-351.
Dormer KJ (1962). The taxonomic significance of crystal forms in Centaurea . New Phytol 61: 32-35.
Enayet Hossain ABM (1975). Tripleurospermum Schultz Bip. In: Davis PH, editor. Flora of Turkey and the East Aegean Islands, Vol. 5. Edinburgh, UK: Edinburgh University Press, pp. 295- 311.
Fahn A, Werker E (1972). Anatomical mechanisms of seed dispersal. In: Kozlowski TT, editor. Seed Biology, Vol. I. Importance, Development and Germination. New York, NY, USA: Academic Press, pp. 151-221.
Funk VA, Susanna A, Stuessy TF, Robinson HE (2009). Classification of Compositae. In: Funk VA, Susanna A, Stuessy TF, Bayer RJ, editors. Systematics, Evolution, and Biogeography of Compositae. Vienna, Austria: International Association for Plant Taxonomy, pp. 171-189.
Garwood NC (1985). The role of mucilage in the germination of cuipo, Cavanillesia platanifolia (H. and B.) H.B.K (Bombacaceae), a tropical tree. Am J Bot 72: 1095-1105.
Greuter W, Oberprieler CH, Vogt R (2003). The Euro-Med treatment of Anthemideae (Compositae)-generic concepts and required new names. Willdenowia 33: 40-41.
Grierson AJC, Yavin Z (1975). Anthemis L. In: Davis PH, editor. Flora of Turkey and the East Aegean Islands, Vol. 5. Edinburgh, UK: Edinburgh University Press, pp. 174-221.
Grubert M (1974). Studies on the distribution of myxospermy among seeds and fruits of Angiospermae and its ecological importance. Acta Biologica Venezuelica 8: 315-551.
Huang Z, Gutterman Y, Hu Z (2000). Structure and function of mucilaginous achenes of Artemisia monosperma inhabiting the Negev desert of Israel. Israel J Plant Sci 48: 255-266.
İnceer H, Bal M, Çeter T, Pınar NM (2012). Fruit structure of 12 Turkish endemic Tripleurospermum Sch. Bip. (Asteraceae) taxa and its taxonomic implications. Plant Syst Evol 298: 845-855.
Jabee G, Ansari MYK, Danish Shahab JC (1971). A general coefficient of similarity and some of its properties. Biometrics 27: 857-887.
Kadereit JW, Jeffrey C (2007). Flowering plants: Eudicots - Asterales. In: Kubitzki K, editor. The Families and Genera of Vascular Plants, Vol. VIII. Berlin, Germany: Springer.
Källersjö M (1985). Fruit structure and generic delimitation of Athanasia (Asteraceae-Anthemideae) and related South African genera. Nord J Bot 5: 11-26.
Korobkov AA (1973). Morpho-anatomical peculiarities of achene of Artemisia ssp. from North East of the USSR. Botanicheskii Zhurnal 58: 1302-1315.
Köstekci S, Arabacı T (2011). Cypsela morphology of Cirsium sect. Cirsium (Asteraceae) taxa in Turkey. Biologia 66: 988-995.
Kothari J, Sharma KC, Sharma M (2012). Micromorphology of fruit surfaces in some taxa of the tribe Astereae (Asteraceae) and their taxonomic significance. Indian Journal of Plant Sciences 1: 240-262.
Kreitschitz A, Vallès J (2007). Achene morphology and slime structure in some taxa of Artemisia L. and Neopallasia L. (Asteraceae). Flora 202: 570-580.
Kynclova M (1970). Comparative morphology of achenes of the tribe Anthemideae Cass. (Asteraceae) and its taxonomic significance. Preslia 42: 33-53.
Lo Presti RM, Oppolzer S, Oberprieler CH (2010). A molecular phylogeny and a revised classification of the Mediterranean genus Anthemis s.l. (Compositae, Anthemideae) based on three molecular markers and micromorphological characters. Taxon 59: 1441-1456.
McNeill J (1979). Structural value: a concept used in the construction of taxonomic classifications. Taxon 28: 481-504.
Mouradian LG (1995). Comparative morpho-anatomical investigation of the achenes of Filifolium Kitam. and related genera. In: Hind DJN, Jeffrey C, Pope GV, editors. Advances in Compositae Systematics. London, UK: Royal Botanic Gardens, Kew, pp. 41-49.
Mukherjee SK, Nordenstam B (2010). Distribution of calcium oxalate crystals in the cypselar walls in some members of the Compositae and their taxonomic significance. Compositae Newsletter 48: 63-88.
Mukherjee SK, Sarkar AK (2001). Morphology and structure of cypselas in thirteen species of the tribe Astereae (Asteraceae). Phytomorphology 51: 17-26.
Oberprieler CH (1998). The systematics of Anthemis L. (Compositae, Anthemideae) in W and C North Africa. Bocconea 9: 1-328.
Oberprieler CH (2001). Phylogenetic relationships in Anthemis L. (Compositae, Anthemideae) based on nrDNA ITS sequence variation. Taxon 50: 745-762.
Oberprieler CH, Vogt R, Watson LE (2007). Tribe Anthemideae Cass., The Families and Genera of Vascular Plants. In: Kubitszki K, editor. Flowering Plants, Eudicots, Asterales, Vol VIII. Berlin, Germany: Springer, pp. 342-374.
Özbek MU, Vural M, Daşkın R (2011). A new species of the genus Cota (Asteraceae) from Uludağ, Turkey. Turk J Bot 35: 331- 336.
Özbek MU (2012). Cota J.Gay. In: Güner A, editor. Türkiye Bitkileri Listesi (Damarlı Bitkiler) [A Checklist of the Flora of Turkey (Vascular Plants)], Nezahat Gökyiğit Botanic Garden and Floristics Research Society Publication, İstanbul, Turkey. pp. 146-148.
Ritter MR, Miotto STS (2006). Micromorphology of fruit surfaces in species of Mikania Willd. (Asteraceae) occurring in Rio Grande do Sul State, Brazil. Acta Bot Bras 20: 241-247.
Reese H (1989). Die Entwicklung von Perikarp und Testa bei Calenduleae und Arctotideae (Asteraceae) – ein Beitrag zur Systematik. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 110: 325-419.
Schultz CH (1860). Über die Gattung Ormenis Cass. Flora 43: 433- 434.
Sokal RR, Rohlf FJ (1962). The comparison of dendrograms by objective methods. Taxon 2: 33-40.
Van der Pluym A, Hideux M (1997). Applications d’une methodologie quantitative ála palynologie d’ Eryngium maritimum (Umbelliferae). Plant Syst Evol 127: 55-85.
Ward JM (1993). Systematics of New Zealand Inuleae (Compositae– Asteraceae) – A numerical phenetic study of Raoulia in relation to allied genera. New Zeal J Bot 31: 29-42.
Yakovleva OV, Korobkov AA, Boyko EV (2002). Structure of mucilage containing cells in achene pericarp of some species of Artemisia (Asteraceae). Botanicheskii Zhurnal 87: 1-14.
Young JA, Evans RA (1973). Mucilaginous seed coats. Weed Sci 21: 2-54.
Zarembo EV, Boyko EV (2008). Carpology of some East Asian Cardueae (Asteraceae). Anales del Jardín Botánico de Madrid 65: 129-134.