pollen loadsSugars constitute the main component of bee-collected pollen, which may vary significantly among different pollen taxa according to their botanical origin and the surrounding vegetation. In this study, we investigated the significance of the pollen grain volume and exine sculpture on the ...
This is the case with unknown “type 69” – a small, tricolporate pollen grain encountered within a 60,000-year sediment sequence from Lake Towuti in Sulawesi, Indonesia. This type comprises up to 35% of the pollen count for some Last Glacial Maximum (LGM) samples (highlighting its ...
The carbon content of pollen's sporopollenin-rich exine is about 90% compared to about 50% in the cellulose of plant cell walls, which includes flax.12 The accelerator mass spectrometry (AMS) method of radiocarbon (the same method used to date the Shroud's linen) can accurately 15 January...
MS1, encoding a PHD finger protein, plays an important role in the formation of pollen exine, thereby affecting pollen fertility. In the phylogenetic tree, both MMD1 and MS1 were clustered into the M subfamily. To analyze the potential biological functions of the M subfamily genes, we ...
The shape is prolate (P/E = 1.33–1.44 ± 0.04 μm) (Figure 4B,C) and the grain is monosulcate (Figure 4E). The exine thickening is 1–2 ± 0.43 μm in depth. The ornamentation is usually perforate (Figure 4D) and areolate at aperture areas (Figure 4E,F). Figure 4. Pollen ...
of this genus has been inferred for the first time based on chloroplast DNAtrnLintron,rps16-trnKintergenic spacer,atpB-rbcLintergenic spacer and ribosomal DNA ITS1-5.8S-ITS2 sequences, leaf morphology, anatomy, stomatal characteristics and pollen exine ornamentations. The present findings revealed ...
account of the large pollen grain size, as well as the coarse sculpture of the exine (Miras2009; Pidek2009; de Klerk et al.2015). The levels ofFagopyrumpollen in surface samples, both in situ and near contemporary buckwheat fields are markedly low (Miras2009; Pidek2009; de Klerk et al...
Southern Africa comprises a mosaic of biomes, including some typical of the African continent, such as the Savanna Biome, as well as biomes that are geographically restricted, in particular, the Mediterranean Fynbos Biome, where most of the coastal and near-coastal sites are found (one notable ...
pollen loadsSugars constitute the main component of bee-collected pollen, which may vary significantly among different pollen taxa according to their botanical origin and the surrounding vegetation. In this study, we investigated the significance of the pollen grain volume and exine sculpture on the ...
RowleyDepartment of BotanyPalynologyRowley, J. R., El-Ghazaly, G. & Rowley, J. S. (1987). Microchannels in the pollen grain exine. Palynology, 11, 1-21.Rowley JR, El-Ghazaly G, Rowley JS (1987) Microchannels in the pollen grain exine. Palynology 11(1):1–21...