TY - JOUR AU - BOUSMID, Ahlem AU - BOULACEL, Mouad AU - BENLARIBI, Mostefa PY - 2015/06/01 Y2 - 2024/03/29 TI - FLORAL BIOLOGY OF FOUR SPECIES OF ROSACEAE JF - Sciences & Technologie. C, Biotechnologies JA - STC VL - 0 IS - 41 SE - Articles DO - UR - https://revue.umc.edu.dz/c/article/view/1981 SP - 31-37 AB - <p>Rosaceae that constitute our subject of study have a fairly consistent floral organization and regular flower (pentamers): 5 sepals, five petals, stamens numerous, one or more carpels.</p><p>In our work we are interested to four cultivated species, dominant in our study area are: <em>Amygdalus</em><em> communis </em>Batch., <em>Cydonia oblonga</em> Mill., <em>Eriobotrya</em> <em>japonica </em>Thunb., <em>Malus domestica</em> Borkh.</p><p>After collecting flowers and extraction of pollen grains, observations with binocular and light microscope there emerges a diversity materialized ia in: Flower color ; The presence or absence of duvet or bristles around the reproductive organs protecting them low temperatures; this allows for example medlar and almond tree reproduce during cold periods (December-February).</p> ER -