Results 91 to 100 of about 216,508 (311)

Ecological Adaptation Mechanisms Underlying Successful Plant Reproduction

Advanced Science, EarlyView.
During floral induction, various environmental and endogenous signals converge to regulate the florigen protein, which is transported from leaves to the SAM to initiate flowering. Within the SAM, a complex network of receptor kinases and small peptides orchestrates floral development with high spatiotemporal precision.
Hang Zhao, Shenghui Huo, Yue Xing, Shuxin Zhang, Guilin Li, Yihui Liu, Chongyang Jin, Fuguang Li, Xiaoyang Ge   +8 more
wiley   +1 more source

Quantity versus quality: the sperm war

Asian Journal of Andrology, 2016
The evolution of sperm traits manifests itself prolifically across species, and postcopulatory sexual selection (PSS), as executed by the female, accompanies this process. The adaptive significance of some sperm traits (for example, the shape and number of sperms) is well understood. However, the evolution of germ size has not been fully exploited. The
Shan Xiao, Laixin Xia
openaire   +3 more sources

Sophisticated sperm allocation in male fowl [PDF]

, 2003
When a female is sexually promiscuous, the ejaculates of different males compete for the fertilization of her eggs; the more sperm a male inseminates into a female, the more likely he is to fertilize her eggs.
Pizzari, T., Cornwallis, C.K., Lovlie, H., Jakobssen, S., Birkhead, T.R.   +4 more
core   +1 more source

Nanoscale Spatial Organization of ARC High‐ and Low‐Order Assemblies at Excitatory Synapses

Advanced Science, EarlyView.
ARC (Activity‐Regulated Cytoskeleton‐Associated protein) mediates synaptic plasticity by forming nanoscale assemblies in neurons. Using super‐resolution microscopy and time‐resolved anisotropy with targeted tagging, the study reveals low‐order ARC assemblies at synapses colocalizing with AMPARs, semi‐circular structures at endocytic zones, and 60–80 nm
Martina Damenti, Giovanna Coceano, Mariline Mendes Silva, Jonatan Alvelid, Chiara Sgattoni, Andrea Volpato, Lea Rems, Luciano A. Masullo, Eduard M. Unterauer, Rafal Kowalewski, Lucie Delemotte, Erdinc Sezgin, Ralf Jungmann, Ilaria Testa   +13 more
wiley   +1 more source

Association between hypo-osmotic swelling test-induced tail swelling patterns and sperm quality

Future Science OA
Aim: The current sperm selection procedure for intracytoplasmic sperm injection has limited ability to detect structural and functional abnormalities of the spermatozoa.
Salima Daoud, Olfa Abdelkefi, Afifa Sellami, Azza Bensalem, Nozha Chakroun, Tarek Rebai   +5 more
doaj   +1 more source

Sperm competition selects for sperm quantity and quality in the Australian Maluridae.

PLoS ONE, 2011
When ejaculates from rival males compete for fertilization, there is strong selection for sperm traits that enhance fertilization success. Sperm quantity is one such trait, and numerous studies have demonstrated a positive association between sperm ...
Melissah Rowe, Stephen Pruett-Jones
doaj   +1 more source

Essential role of CFTR in PKA-dependent phosphorylation, alkalinization, and hyperpolarization during human dperm capacitation [PDF]

, 2017
Mammalian sperm require to spend a limited period of time in the female reproductive tract to become competent to fertilize in a process called capacitation.
Austin, Berger, Bobadilla, Buffone, Buffone, Buffone, Buffone, Chang, Chen, Chen, Chen, Chávez, Chávez, De Jonge, De La Vega-Beltran, Demarco, Diao, Dirami, Dostmann, Ellsworth, Escoffier, Esteves, Figueiras-Fierro, Gabriel, Gadsby, Hernández-González, Ishiguro, José, Kase, Kujala, Köhn, l'Hoste, Laemmli, Leclerc, Li, Lishko, Lochner, Luconi, López-González, Ma, Melis, Mortimer, Muanprasat, Navarrete, Neill, Nishigaki, Nolan, Okamura, Rode, Schulz, Sheppard, Sorum, Stival, Stival, Tabcharani, Tang, Towbin, Visconti, Visconti, Wennemuth, Wertheimer, Xu, Zeng, Zeng   +63 more
core   +1 more source

Glutamine Deprivation Triggers Tribbles Homolog 3 Dependent G‐Quadruplex Resolution to Maintain DNA Repair and Tumor Survival

Advanced Science, EarlyView.
Glutamine deprivation triggers transient DNA damage yet activates adaptive repair in hepatocellular carcinoma cells. We identify TRIB3 as a stress‐induced nuclear scaffold that associates with DDX5 and G‐quadruplex DNA atBRCA1 andRAD51AP1 promoters. TRIB3 loss increases G4 accumulation, suppresses HR gene transcription, elevates γ‐H2A.X, and sensitizes
Qiang Ji, Xuedan Sun, Zhangran Sun, Mengfan Li, Xinyu Cheng, Shuai Tian, Rick F. Thorne, Jinming Li, Guangzhi Liu, Mian Wu, Xiaoying Liu   +10 more
wiley   +1 more source

Casanovas are liars : behavioral syndromes, sperm competition risk, and the evolution of deceptive male mating behavior in live-bearing fishes [version 2; referees: 2 approved, 1 approved with reservations] [PDF]

, 2013
Male reproductive biology can by characterized through competition over mates as well as mate choice. Multiple mating and male mate choice copying, especially in internally fertilizing species, set the stage for increased sperm competition, i.e., sperm ...
Bierbach, David, Geupel, Holger, Makowicz, Amber M., Plath, Martin, Schlupp, Ingo, Streit, Bruno   +5 more
core   +2 more sources

Sertoli Cell‐Derived Extracellular Vesicles Orchestrate Cadmium‐Induced Testicular Inflammation and Fibrosis

Advanced Science, EarlyView.
Environmental cadmium exposure disrupts testicular homeostasis through a novel intercellular communication axis. Stressed Sertoli cells release extracellular vesicles carrying damage‐associated molecular patterns and mitochondrial fragments, which activate macrophages via TLR4/NF‐κB signaling.
Jianfeng Ma, Mailin Gan, Shuang Liang, Siyu Chen, Ziling Hao, Yiting Yang, Jiawei Lu, Qihang Wu, Yuqian Shi, Lijun Sun, Jiaxin Li, Saihao Wang, Yan Wang, Xiaofeng Zhou, Lei Chen, Ye Zhao, Li Zhu, Linyuan Shen   +17 more
wiley   +1 more source