CAPSULE, LEAF AND CYATHIAL GLAND MORPHOLOGY OF TURKISH PERENNIAL TAXA OF Euphorbia L. SECTION Pithyusa (Raf.) Lázaro

Yıl 2018, , 11 - 19, 15.04.2018

İlker Genç , Şükran Kültür Gülay Ecevit-genç

https://doi.org/10.23902/trkjnat.342096

Cited By: 1

Öz

Macro and micromorphology of cyathial glands, capsules and cauline leaf
surfaces of 13 perennial species of Euphorbia
L. subg. Esula Pers. sect. Pithyusa
(Raf.) Lázaro in Turkey were
studied. Cyathial gland structure, based on cyathial gland shapes, colour and
appendages was examined from live material by direct field observations and
investigations. Cauline leaves and capsule surface features were analysed with
scanning electron microscopy (SEM). Capsule sizes, capsule shapes and capsule
and cauline leaf surface ornamentations were also studied. The capsule shape was
found to vary from subglobose to conical. In most species, cyathial gland
colour ranged from greenish-yellow to yellowish-green but some species were
distinguished by their reddish or purplish cyathial glands. Although the number
of cyathial glands in all species was four, five cyathial glands were
determined to exist in some specimens of E.
pestalozzae Boiss. Three different cyathial gland shapes (elliptic, trapezoid-elliptic or elliptic-reniform) were observed. Capsule
surface of more than half of the studied species (7 taxa) is covered with
nipple-like projections (papillate-mammillate) and the rest are covered with
tiny rounded or hillock-like ornamentation (colliculate). The cauline leaf surface
is papillate-mammillate in the majority of the studied species, although,
colliculate surface is also observed in two species (E. seguieriana Necker and E.
thessala (Form.) Degen & Dörf.). In conlusion, macro and
micromorphological structures of cyathial gland and capsule of Euphorbia sect. Pithyusa taxa appeared to be useful diagnostic characters for
species identifications. 

Anahtar Kelimeler

micromorphology, leaf surface, subg. Esula, Euphorbiaceae, Leafy spurge, Euphorbiaceae

Kaynakça

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