Table 2 - uploaded by Atiye Nejad Falatoury
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Nonea Medik. is a genus of the Boraginaceae tribe Boragineae, with approximately 35 species
worldwide. Examination of their palynological characters supported the separation of taxa, which
is usually based on morphological and micromorphological reproductive features. Pollen grains of
10 taxa representing three groups of taxa in Iran, the N. caspic...
Context in source publication
Context 1
... was diffusely psilate- punctate, with the exception of the equatorial reticulum which was covered by more or less pronounced granular processes and thickened in the margins of apertures. This group includes (Bigazzi and Selvi, 1998) N. rosea shows distinct differences from this group (Fig. 3. A-F and M; Table 2). N. rosea. ...
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The taxonomic position and affinities of the rare Turkish endemic Arnebia purpurea are analyzed using nuclear and plastid DNA sequence data and morphological characters. Phylogenetic analysis of a wide sample of old-world Lithospermeae consistently retrieved a clade with this species sister to Huynhia pulchra, the only member of the genus Huynhia....
The new species Nonea iranica (Boraginaceae-Boragineae) is described from central region of Iran. It shows a combination of morphological characteristics concerning root, flower and fruit that distinguishes it from N. caspica and N. polychoroma. The palynological examination supports the results of morphological observations. The doubts about two s...
Citations
... Scheel et al. (1996) studied the pollen morphology of 30 taxa and classified them into nine pollen types based on aperture characteristics and surface ornamentation. Other palynological studies of different members of the Boraginaceae from various parts of the world include those by Nowicke and Miller (1990), El-Ghazaly (1995), Qureshi (1997), Bigazzi and Selvi (1998), Liu et al. (2001a,b), Khatamsaz (2001), Hargrove and Simpson (2003), Bigazzi et al. (2006), Melo et al. (2006), Binzet et al. (2010), Binzet (2011), Falatoury et al. (2011), Mehrabian et al. (2012), Coutinho et al. (2012) and Fukuda and Ikeda (2012). ...
Manually-constructed keys to many groups of the Egyptian flora are in urgent need of improvement and updating. To construct a conventional substitute of the key to representatives of the Boraginaceae, a data matrix was compiled to accommodate 54 characters recorded comparatively for the 49 species belonging to 14 genera which represent this family in the flora of Egypt. The 54 characters were accurately and lucidly defined to cover as much of the easily observable aspects of vegetative and floral variation in the plants as possible. The data matrix was analyzed using the key-generating package of programs DELTA. The analysis produced a conventional key with a detailed description of every species in terms of the 54 characters. The key is decidedly a marked improvement over its predecessors in that it is strictly comparative and leads directly to the full scientific name of any taxon, instead of having to use a key to the genera followed by a second key to the infra-generic taxa.
The pollen morphology of 15 Onosma L. species has been examined by SEM for the first time from Pan Himalayan regions of Pakistan and China.
Generally, the pollen grains are single, isocolpate, radially symmetrical, isopolar or heteropolar, 3 colporate or 3
syncolporate, small to medium in size. The mean polar axis ranged from 10.00 25.43 μm long while the equatorial diameter ranged from 8.68 16.93 μm. The mean P/E ratio generally ranged from 1.04 1.56 μm. On the basis of P/E ratio, three pollen shapes have been recognized (prolate spheroidal, subprolate and prolate). Ornamented aperture membrane and lolongate ora uniformly observed among all studied taxa. However, the results show great diversity within species in regard of polarity, apertures and exine ornamentation (spinulose, rugulate, rugulate echinate, rugulate to granulate). On the basis of aperture type, two basic pollen types have been recognized. Type I 3 syncolporate observed in five species (O. confertum, O. dicroanthum, O. hispida, O. limitaneum and O. paniculatum) and Type II 3 colporate in 10 species (O. exertum, O. fistulosum, O. glomeratum, O. hookeri var. hirsutum, O. hookeri var. longiflorum, O. maaikangense, O. multiramosum, O. sinicum, O. waddellii, and O. waltonii).
On the basis of 10 different pollen characters (seven qualitative and three quantitative) and 24 characters states two types of numerical analyses (PCA and CA) have been carried out in order to determine the potential of the pollen morphological characteristics for determination of the species relationships. The present palynological data therefore provides new information about pollen morphology of all Onosma L. species especially O. glomeratum and O. multiramosum, O. hookeri var. hirsutum, O. hookeri var. longiflorum. The current study can be helpful to analyze the pollen variation within Onosma L. species. It also highlights the significance of pollen characters used to determine intraspecific relationships as well as correlation of pollen characters with the taxonomy of the genus.
Key words: Pollen morphology, SEM, Onosma, Lithospermeae, Boraginaceae, Pan Himalayan, Numerical analysis, Systematic significance.
