PollenAir pollutionAllergyAir pollution affects pollen allergy in at least three ways: through its direct effects on human health, through changes in plant health, and through the direct alteration of the allergenic pollen grain. This literature review addresses the latter point: the chemical or ...
L'échange des gènes est limité à la fois par la défaillance partielle des graines et l'infertilité des hybrides (VALENTINE, 1961) ; mais les hybrides se produisent naturellement et sont bien connus. Les espèces du genre Quercus, en Europe, nous four- nissent un autre bon exemple,...
Grain de mil flint also occurs at several of the Vézère valley sites in the Périgord, and two types of northern Aquitaine flints (Bergeracois and Fumel) have been identified at the Tuto de Camalhot and Régismont-le-Haut. Indirect procurement by down-the-line trade via Périgord ‘relay...
These large-sized baskets with double stitches are dominant among the baskets at La Draga and may have been used as immobile objects to store grain or legumes, owing to the optimal conditions provided by the texture of the straw, which would ensure a balance between ventilation and maintenance ...
Pollen viability of the ASH plants ranged from 79.2 to 95%with a strong negative correlation to chromosome number, which varied between 34and 42. Over 85% of the ASH meiocytes showed regular bivalent chromosome pair-ing; however, several anomalies like anaphase bridges, laggard chromosomes, uni-...
Since the first indications by Sands and coworkers [81], the role of biological particles in cloud formation (i.e. pollen, fungal spores, and bacteria can be activated as CCNs) precipitations, ecosystem interactions, has been the subject of an increasing number of studies fully quoted in [...
Raising growth of date palm cv. Bartomouda plantlets with date palm pollen grain extract and amino acids compound under greenhouse conditionDarwesh RasmiaS.S ElBanna AAGehan Mohamad Y
Bateman’s principle and plant reproduction: the role of pollen limitation infruit and seed set. Bot. Rev. 60: 83-139.Cantagallo, J.E., Medan, D. and Hall, A.J., 2004. Grain number in sunflower as affected byshading during floret growth, anthesis and grain setting. Field Crops Res...