1,721,206 research outputs found
Radiazione adattativa dei pesci antartici. Mappatura in situ di tratti evolutivamente rilevanti nel genoma dei Notothenioidei (IMAGES).
No full textNotothenioid fish are the result of adaptive radiation in the Southern Ocean, during oceanographic and
ecological changes driven by the tectonics of the Antarctic continent. Remarkable biological and ecological
modifications underlie the diversification and the evolutionary success of these fishes, presently recognized
as prominent models in evolutionary/adaptive studies.
In present project we will integrate sequence-based data from the available genomic resources with
powerful in situ technologies, to provide patterns of genome structure and change in notothenioids over an
evolutionary time scale. This will be achieved by physical mapping, onto the notothenioid chromosomal
genomes, of marker sequences selected for their high informative value (AFGPs genes, sex-related
sequences, iron metabolism genes, LINE sequences).
The research aims at providing an comparative picture of the genome structure across notothenioid
phylogeny to contribute to elucidate steps and mechanisms of genomic restructuring in this important animal
model, over evolutionary time scale. The research contributes to the ongoing international effort towards our
understanding of patterns and mechanisms of biological response to environmental change
BIOCHEMICAL AND MOLECULAR STUDIES ON METALLOTHIONEINS AND ASPARTIC PROTEINASES IN ANTARCTIC FISH
No full textBIOCHEMICAL AND MOLECULAR STUDIES ON METALLOTHIONEINS AND ASPARTIC PROTEINASES IN ANTARCTIC FISH
No full textUnexpected Diversity of Metallothionein Primary Structure in Amphibians: Evolutionary Implications for Vertebrate Metallothioneins.
No full textGlyphosate induces hepatic and testicular toxicity in the non-target lizard Podarcis sicula.
No full text
Studio dei meccanismi che regolano l'accumulo e l'omeostasi dello zinco negli embrioni di riccio di mare
No full textDottorato di ricerca in biologia evoluzionistica e del differenziamento. 8. ciclo. A.a. 1992-95. Relatore e coordinatore S. FilosaConsiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7, Rome; Biblioteca Nazionale Centrale - P.za Cavalleggeri, 1, Florence / CNR - Consiglio Nazionale delle RichercheSIGLEITItal
NEW INSIGHTS ON THE BIOSYNTHETIC INTERFERENCE OF ESTROGEN-LIKE COMPOUNDS ON PODARCIS SICULA MALE
No full textEctopic synthesis of vitellogenin in testis and epididymis of estrogen-treated lizard Podarcis sicula.
Full text linkIn oviparous vertebrates, vitellogenin (VTG) is the major yolk precursor synthesized in the liver of sexually mature females during the reproductive period. In males, the VTG gene is silent, but it may be activated by estradiol-17b (E2) or estrogen-like substances. Until now, extra-hepatic expression and synthesis of VTG after estrogen exposure has been reported only for aquatic vertebrates. This study demonstrates the ability of testis and epididymis of the terrestrial oviparous lacertid Podarcis sicula to synthesize VTG following E2 exposure. The results of in situ hybridization and immunohistochemistry analysis show the presence of both VTG mRNA and protein in these districts besides the known induction in the liver. The possible contemporaneous uptake of the E2-induced hepatic VTG by means of the specific vitellogenin receptor has been also evaluated. Finally, histological analysis shows that the E2-treatment during the mating season impairs spermatogenesis
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