Pollen morphology of the genus Oxytropis DC. in Turkey

Abstract

Pollen morphology of 11 species of the genus Oxytropis DC. (Fabaceae) distributed in Turkey were examined with light (LM) and scanning electron microscope (SEM). Morphology of pollen grains shows isopolar, radially symmetric, tricolporate, prolate or subprolate, porus shape oblate or operculate and exine subtectate. The size varies with the polar axis from 19.52 -33.31 µm and the equatorial axis from 13.50 -25.82 µm. There are five ornamentation types: perforate at equatorial section and psilate at polar sections, microreticulate at equatorial sections and psilate at polar sections, microreticulate at equatorial sections and perforate at polar sections, microreticulate at both equatorial and polar sections and perforate at both equatorial and polar sections. Pollen aperture, shape and especially different ornamentation patterns at polar and equatorial section of pollen, as found in this study, appear to be important character. The findings of this study indicate the taxonomic implications of pollen morphology in understanding the similarity and relationships in the genus Oxytropis.

Pollen morphology of Asian Vigna species (genus Vigna; subgenus Ceratotropis)from India and its taxonomic implications

“…Pollen morphology has played an important role in legume systematics (Erdtman, 1969;Bronckers et al, 1972;Ferguson and Skvarla, 1981;Kahraman et al, 2013;Ceter et al, 2013aCeter et al, , 2013bPinar et al, 2014). In previous studies, several authors observed the significant variation in pollen sculpture among species of the genus Vigna (Verdcourt, 1970;Bronckers et al, 1972;Stainier, 1974;Maréchal et al, 1978;Wael, 2009).…”

Phylogenetic relationships among native Oxytropis species in Turkey using the trnL intron, trnL-F IGS, and trnV intron cpDNA regions

“…Karaman et al (2009) Oxytropis savellanica and O. fominii showed higher genetic variation when only the trnL intron region was analyzed (Figure 1). Ceter et al (2013) indicated that the shortest porus length (2.82 µm) was seen in O. savellanica, whereas the longest (5.04 µm) one was in O. lazica within the native species studied. Hence, the distant location of these two species in the trnL intron tree may be meaningful.…”

“…Relationships among species of the genus have been studied based on anatomical and morphological characters such as pollen morphology, seed morphology, stomata, trichome, leaf surface morphology, fruit, and flower structures by several researchers (Dickoré and Kriechbaum, 2006;Kholina and Kholin, 2008;Karaman et al, 2009;Ceter et al, 2013;Erkul et al, 2014). Even though there are numerous studies indicating morphological variations in Oxytropis species, the number of studies in the literature concentrating on phylogenetic relationships among them is limited (Jorgensen et al, 2003;Gao et al, 2009;Archambault and Stromvik, 2012;Artyukova and Kozyrenko, 2012).…”

Biosystematic Study on Some Egyptian Species of Astragalus L. (Fabaceae)

“…The family Leguminosae (Fabaceae) is the third-largest family of angiosperms (flowering plants) after the Orchidaceae and the Asteraceae or Compositae, with 727 genera and 19,325 species [1,2], comprising annual and perennial herbs, shrubs, and trees [3]. This family distributed in cold mountainous regions in Europe, Asia, and North America, also has very economic importance [4] which is the main sources of gums, dyes, fuel, timber, medicinals, and pulses [5].…”