Showing results 21 to 40 on 1363 in total
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The evolution of senescence (the physiological decline of organisms with age) poses an apparent paradox because it represents a failure of natural selection to increase the survival and reproductive performance of organisms. The paradox can be resolved if natural selection becomes less effective with age, because the death of postreproductive individuals should have diminished effects on Darwinian fitness. A substantial body of empirical work is consistent with this prediction for animals. However, such evidence is still scarce in plants. I will discuss the plausible reasons why the genetic basis of senescence in plants was not studied from an evolutionary perspective in the past. I will also present our experimental results on the quantitative genetic basis of senescence in the short-lived perennial plant Silene latifolia and their contribution to our understanding of the evolution of senescence in plants.
HDR de Franck Picard le jeudi 4 décembre 2014 à 13 h 30 - amphithéâtre Jordan (Institut Camille Jordan) bâtiment Braconnier (Doua)
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Thèse de Lucie Froissart - Vendredi 30 novembre 2012 - 14h00 Amphi Physique Nucléaire - Bât Dirac