Marrubium eriocephalum (Lamiaceae) is described as a new record for the Flora of Turkey (B9 Van). A detailed morphological description, photographs, distribution map, and pollen and nutlet morphology of this new record are given.

* The effects of actinomycin D and cycloheximide on RNA and protein synthesis were investigated during pollen tube development of Pinus bungeana. * RNA and protein contents, protein expression patterns, cell wall components and ultrastructural changes of pollen tubes were studied using spectrophotometry, SDS-PAGE electrophoresis, Fourier transformed infrared (FTIR) microspectroscopy and transmi...

In angiosperms, pollen tubes carry two sperm cells toward the egg and central cells to complete double fertilization. In animals, not only sperm but also seminal plasma is required for proper fertilization. However, little is known regarding the function of pollen tube content (PTC), which is analogous to seminal plasma. We report that the PTC plays a vital role in the prefertilization state an...

In most plant species, surfaces of pollen grains display characteristic patterns of apertures, formed by the gaps in the pollen wall exine. The aperture patterns are species-specific and tend to be very precise, with pollen of each species usually developing a certain number of apertures placed at distinct positions and acquiring specific morphology. The precision with which pollen apertures ar...

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...

In our experiment, the effects of bee pollen addition in diet on the functional morphology of small intestine in rats were investigated. The microscopic changes in the small intestine after administration of the pollen addition were evaluated. The experimental animals were divided into one control and three experimental groups of ten rats in each group. Feed given to animals in group A containe...

Pollen morphology of three parental Quercus species (Q. robur L., Q. petraea (Matt) Liebl, Q. pubescens Willd.) and two spontaneous hybrids of these species (Q. ×calvescens Vuk. = Q. petraea × Q. pubescens and Q. ×rosacea Bechst. = Q. robur × Q. petraea) was investigated in this study. The pollen originated from 18 natural oak sites and 67 individuals (oak trees). Each individual was represente...

Gleditsia sinensis Lam. (Fabaceae) is an endemic species in China, which has a wide range of ecological functions and high economic value. G. belongs to androdioecy, the stamens perfect flowers are aborted, meaning that flower functional female flower. Understanding dynamic process flowering characteristics pollen morphology effectively determine viability vitality, suitable conditions for shor...

Non-random mating in plant populations can be influenced by numerous reproductive and demographic factors, including floral morphology and inter-plant distance. Here, we investigate patterns of outcrossed mating through male function in Narcissus triandrus, a tristylous, bee-pollinated wild daffodil from the Iberian Peninsula, to test pollen transfer models which predict that floral morphology ...