Diana Cell Picture Show - Biology
نویسنده
چکیده
Images taken in Diana Bratu's lab by Dr. Irina Catrina are featured in Cell's Journal Picture Show that was recently released, called Reproduction. The image titled "The Short End of a Long Stick" shows sperm cells from Drosophila. Flies in the Drosophila genus produce the longest sperm cells on Earth. One species, Drosophila bifurca, has sperm that is 58 mm (2.3 inches) long. Our good friend D. melanogaster generates sperm that are merely ~2 mm long but still ~300 times the length of human sperm. Moreover, their sperm seem to navigate a female's reproductive tract by swimming backward, or tail first. Drosophila sperm are delivered to the females in tangled coils, with ~4000 transferred in one encounter. Several species of Drosophila mate by traumatic insemination—the male pierces the female's abdomen and injects sperm into abdominal cavity.
منابع مشابه
Downregulation of Dickkopf-3 disrupts prostate acinar morphogenesis through TGF-b/Smad signalling
Diana Romero, Yoshiaki Kawano*, Nora Bengoa, Marjorie M. Walker, Nicole Maltry, Christof Niehrs, Jonathan Waxman and Robert Kypta Department of Surgery and Cancer, Imperial College London, London, W12 0NN, UK Cell Biology and Stem Cells Unit, CIC bioGUNE, Bilbao, Spain Centre for Pathology, Imperial College London, St Mary’s Hospital, London, W2 1NY, UK German Cancer Research Center, Heidelberg...
متن کاملInduction of cell retraction by the combined actions of Abl–CrkII and Rho–ROCK1 signaling
Dynamic modulation of cell adhesion is integral to a wide range of biological processes. The small guanosine triphosphatase (GTPase) Rap1 is an important regulator of cell-cell and cell-matrix adhesions. We show here that induced expression of activated Abl tyrosine kinase reduces Rap1-GTP levels through phosphorylation of Tyr221 of CrkII, which disrupts interaction of CrkII with C3G, a guanine...
متن کاملMycoremediation of Dichlorvos Pesticide Contaminated Soil by Pleurotus pulmonarius (Fries) Quelet
The extensive use of pesticides leads to accumulation of a huge amount of residues in the environment. As such, the present study investigates the potentiality of Pleurotus pulmonarius to bioremediate dichlorvos pesticides (2,2-dichlorovinyldimethylphosphate) in contaminated soil. DDVP-polluted soils have been contaminated in five concentrations (5% v/w, 10% v/w, 15% v/w, 20% v/w, and 25% v/w),...
متن کاملWnt Signalling: A Moving Picture Emerges From van gogh
Recent studies on vertebrate homologues of the van gogh/strabismus (vang/stbm) gene, a key player in planar cell polarity signalling in Drosophila, show that vang/stbm is involved in patterning and morphogenesis during vertebrate gastrulation where it modulates two distinct Wnt signals.
متن کاملMycoremediation of Dichlorvos Pesticide Contaminated Soil by Pleurotus pulmonarius (Fries) Quelet
The extensive use of pesticides leads to accumulation of a huge amount of residues in the environment. As such, the present study investigates the potentiality of Pleurotus pulmonarius to bioremediate dichlorvos pesticides (2,2-dichlorovinyldimethylphosphate) in contaminated soil. DDVP-polluted soils have been contaminated in five concentrations (5% v/w, 10% v/w, 15% v/w, 20% v/w, and 25% v/w),...
متن کامل