.... At the point of fertilization, signalling lifts the quiescent state and triggers cell cycle reactivation. Studying how the cell cycle is regulated during plant gamete development and fertilization is challenging, and decades of research have provided valuable, yet sometimes contradictory, insights. This Review...

..., previously proposed to regulate MSP dynamics. Moreover, gskl-2 gsp-4; gskl-1 triple mutants often skip female MII, similar to memi-1/2/3(RNAi) . The GSK3 kinases and PP1 phosphatases perform similar sperm-related functions and work together for post-fertilization functions in the oocyte that involve MEMI...

...Fang Yang; Maria Gracia Gervasi; Gerardo Orta; Darya A. Tourzani; Jose Luis De la Vega-Beltrán; Gordon Ruthel; Alberto Darszon; Pablo E. Visconti; P. Jeremy Wang ABSTRACT The CatSper cation channel is essential for sperm capacitation and male fertility. The multi-subunit CatSper complexes form...

...Akihito Morita; Yuhkoh Satouh; Hidetaka Kosako; Hisae Kobayashi; Akira Iwase; Ken Sato ABSTRACT Fertilization triggers significant cellular remodeling through the oocyte-to-embryo transition. In this transition, the ubiquitin-proteasome system and autophagy are essential for the degradation...

... actin cap region of the oocyte, thus confining GPI-APs to the appropriate fusion site. Oocyte Fertilization GPI-anchored proteins (GPI-APs) Microvilli CD9 JUNO Gunma University 10.13039/501100007106 19014 Japan Society for the Promotion of Science 10.13039/100007449...

... developmental potential of these RRF-reduced oocytes with MII-spindle shrinkage was not lost after fertilization. When somatic cell nuclear transfer was performed, the successful generation of cloned mice was somewhat improved and abnormalities were reduced when oocytes with slightly reduced RRF levels were...

... and chemotropism to deliver sperm to ovules. The protein DGK4 senses the hormone nitric oxide to regulate these processes. DGK4 Pollen tube Nitric oxide Fertilization Plant sexual reproduction H-NOX Arabidopsis King Abdullah University of Science and Technology 10.13039/501100004052...

.... In teleosts, fertilization occurs through the micropyle, a funnel-like opening in the chorion, formed by a unique enlarged follicle cell, the micropylar cell (MC). We describe here, for the first time, the mechanism that underlies the differentiation of the MC. Our genetic analyses show that Taz is essential...

... fertilization products. Blocking the initial unequal division genetically, we first highlight that the default differentiation state after male meiosis is a vegetative fate, which is consistent with earlier work. We find that uni-nucleated mutant microspores differentiated as wild-type vegetative cells...

...Javier M. Hernández; Benjamin Podbilewicz Cell-cell fusion is essential for fertilization and organ development. Dedicated proteins known as fusogens are responsible for mediating membrane fusion. However, until recently, these proteins either remained unidentified or were poorly understood...

...Olivier Coen; Elisa Fiume; Wenjia Xu; Delphine De Vos; Jing Lu; Christine Pechoux; Loïc Lepiniec; Enrico Magnani Angiosperm seed development is a paradigm of tissue cross-talk. Proper seed formation requires spatial and temporal coordination of the fertilization products – embryo and endosperm...

...Marta Adelina Mendes; Rosalinda Fiorella Guerra; Beatrice Castelnovo; Yuriria Silva-Velazquez; Piero Morandini; Silvia Manrique; Nadine Baumann; Rita Groß-Hardt; Hugh Dickinson; Lucia Colombo Fertilization in flowering plants requires a complex series of coordinated events involving interaction...

... mitochondria has also been observed in mouse and fly embryos but their role in degradation is debated. Both worm Atg8 ubiquitin-like proteins, LGG-1/GABARAP and LGG-2/LC3, are recruited around sperm organelles after fertilization. Whereas LGG-1 depletion affects autophagosome function, stabilizes...

... fusion during mammalian fertilization. After initial contact, adhesion between gametes only leads to fusion in the presence of three membrane proteins that are necessary, but insufficient, for fusion: Izumo1 on sperm, its receptor Juno on egg and Cd9 on egg. What happens during this adhesion phase...

... with these events. Inhibition of fertilization by anti-UPIII antibody is rescued by co-incubation with UF-MDs. This suggests that, like MDs in intact eggs, the isolated UF-MDs are capable of interacting with sperm, an interaction that does not interfere with normal fertilization but rather augments the ability...

...Masaru Okabe Fertilization is the process by which eggs and spermatozoa interact, achieve mutual recognition, and fuse to create a zygote, which then develops to form a new individual, thus allowing for the continuity of a species. Despite numerous studies on mammalian fertilization, the molecular...

...Rémi Dumollard; Mark Levasseur; Céline Hebras; Philippe Huitorel; Michael Carroll; Jean-Philippe Chambon; Alex McDougall Mos kinase is a universal mediator of oocyte meiotic maturation and is produced during oogenesis and destroyed after fertilization. The hallmark of maternal meiosis is that two...

...Sze Jet Aw; Yuki Hamamura; Zhong Chen; Arp Schnittger; Frédéric Berger Fertilization in flowering plants involves two sperm cells and two female gametes, the egg cell and the central cell, progenitors of the embryo and the endosperm, respectively. The mechanisms triggering zygotic development...

.... * Author for correspondence ( [email protected] ) 30 9 2009 © 2009. 2009 Calcium Cell cycle Fertilization Mouse CamKII (Camk2) Mouse eggs are ovulated following arrest at metaphase of the second meiotic division (metII). Fertilization breaks this arrest...

... their growth within maternal tissues until they reach the female gametophytes. Upon arrival, the female FER -dependent signaling cascade is activated to mediate pollen tube reception and fertilization, while male ANX -dependent signaling is deactivated, enabling the pollen tube to rupture and deliver its sperm...