Palynological analysis of pollen, Pteridophyta spores and algae deposited in the superficial sediments at Lagoa de Cima and Lagoa do Campelo Lakes, located in the north of Rio de Janeiro state, was used to determine the spatial variation of the palynomorphs deposition. A total of 67 pollen types were identified at Lagoa de Cima, with an expressive contribution of regional arboreous taxa, hydrop...

4-Methylmorpholine N-oxide monohydrate (MMNO.H(2)O), a potent solvent for polysaccharides, is an effective vehicle for release of membrane-enclosed male gametophytes (sporoplasts) from spore walls. This release occurs in minutes when pollen (Lilium longiflorum Thunb.) is suspended in a melt of MMNO.H(2)O at 75 degrees C. Continued heating at 75 degrees C leads to distintegration of the exine ;s...

In this study, the main features of trichomes, nutlet, and pollen A. orientalis, which growing in four different provinces Turkey, were examined as detail results illustrated. orientalis carries both peltate capitate well non-glandular ones. However, subtypes glandular trichomes recognized. The shape nutlets is obovate, oblong-obovate nutlet surface sculpturing alveolate. grains euprolate (P/E ...

The present study focused on the examination of seed and pollen morphology nine native Chinese species genus Sorbus L. using Light Microscope (LM) Scanning Electron (SEM). crucial features investigated for seeds include color, shape, epidermal cell size, coat ornamentation. On other hand, grains are analyzed based quantitative traits as well following traits: polar equatorial view, apertures ex...

The genus Hymenocardia has been placed either in Euphorbiaceae subfamily Phyllanthoideae or in its own family and then associated with the Urticales, particularly the Ulmaceae. However, the pollen exine wall of Hymenocardia lacks the microchanneled tectum, granular interstitium, and thin foot-layer of the Urticales. Hymenocardia instead has many palynological features found in the Phyllanthoide...

In this study, the pollen morphology of allergic Dysphania botrys (L.) Mosyakin & Clemants (Amaranthaceae) taxon, which has a natural distribution within borders Eskişehir province, was investigated in terms and properties. Pollen grains D. are periporatae sphaeroidal shaped. As result microscopic examinations, A/B=1.06 μm (W), A (polar axis): 4.08 µm; B (Equatorial measured at 25.04 μm. Th...

The ultrastructure of the Late Cretaceous (Santonian-?early Campanian) megaspore Glomerisporites pupus and its associated microspores has been examined in an attempt to resolve a number of problems concerning the interpretation of their morphology. The new observations presented are based on an analysis of entire, fragmentary, and thin-sectioned specimens under scanning and transmission electro...