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Access to Research and Communications Annals
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526 Publications
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  • Laser-microdissection unravels cell-type specific transcription in > arbuscular mycorrhizal roots, including CAAT-box TF gene expression correlating with fungal contact and spread

    Hogekamp, C.; Arndt, D.; Pereira, P.A.; Becker, J.D.; Hohnjec, N.; Kuster, H. (2011)
    Arbuscular mycorrhizae (AM) are the most widespread symbioses on Earth, promoting nutrient supply of most terrestrial plant species. To unravel gene expression in defined stages of Medicago truncatula root colonization by AM fungi, we here combined genome-wide transcriptome profiling based on whole mycorrhizal roots with real-time RT-PCR experiments that relied on characteristic cell-types obtained via laser-microdissection. Our genome-wide approach delivered a core set of 512 genes significa...

    Inactive rhomboid proteins: New mechanisms with implications in health and disease

    Lemberg, Marius K; Adrain, Colin (2016)
    Projects: EC | IPAD (618769)
    This deposit is composed by the main article, and hasn't not associated any supplementary materials of the publication. This publication hasn't any creative commons license associated. Rhomboids, proteases containing an unusual membrane-integral serine protease active site, were first identified in Drosophila, where they fulfill an essential role in epidermal growth factor receptor signaling, by cleaving membrane-tethered growth factor precursors. It has recently become apparent that eukar...

    The making of gametes in higher plants

    Boavida, L.; Becker, J.D.; Feijó, J.A. (2005)
    Projects: FCT | POCTI/BCI/41725/2001 (41725)
    Higher plants have evolved to be one of the predominant life forms on this planet. A great deal of this evolutionary success relies in a very short gametophytic phase which underlies the sexual reproduction cycle. Sexual plant reproduction takes place in special organs of the flower. In most species the processes of gametogenesis, pollination, syngamy and embryogenesis are sequentially coordinated to give rise to a functional seed in a matter of few weeks. Any of these processes is so intrica...

    Transcriptional profiling in Saccharomyces cerevisiae relevant for predicting alachlor mechanisms of toxicity

    Gil, Fátima N.; Gonçalves, Alina C.; Jacinto, Maria João; Becker, Jörg D.; Viegas, Cristina A. (2011)
    Projects: FCT | PTDC/AMB/64230/2006 (64230)
    Alachlor has been a commonly applied herbicide and is a substance of ecotoxicological concern. The present study aims to identify molecular biomarkers in the eukaryotic model Saccharomyces cerevisiae that can be used to predict potential cytotoxic effects of alachlor, while providing new mechanistic clues with possible relevance for experimentally less accessible eukaryotes. It focuses on genome-wide expression profiling in a yeast population in response to two exposure scenarios exerting eff...

    Niflumic acid disrupts marine spermatozoan chemotaxis without impairing the spatiotemporal detection of chemoattractant gradients

    Guerrero, Adán; Espinal, Jesús; Wood, Christopher D; Rendón, Juan M; Carneiro, Jorge; Martínez-Mekler, Gustavo; Darszon, Alberto (2013)
    Projects: FCT | PTDC/SAU-OBD/69928/2006 (69928)
    In many broadcast-spawning marine organisms, oocytes release chemicals that guide conspecific spermatozoa towards them through chemotaxis. In the sea urchin Lytechinus pictus, the chemoattractant peptide speract triggers a train of fluctuations of intracellular Ca(2+) concentration in the sperm flagella. Each transient Ca(2+) elevation leads to a momentary increase in flagellar bending asymmetry, known as a chemotactic turn. Furthermore, chemotaxis requires a precise spatiotemporal coordinati...
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