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    2. 海峡生命科学前沿论坛第一百四十八讲——How cereals accumulate their seed proteins: a cell biology and evolutionary view等

      发布者:周君玲发布时间:2019-10-15浏览次数:79

      Time:  9:30-11:30

      Date:   Oct  24th,2019

      VenueBoXue  lecture Hall

      Talk  1

      TitleHow  cereals accumulate their seed proteins: a cell biology and evolutionary  view

      SpeakerAlessandro  Vitale (scientist at the Institute of Agricultural Biology and Biotechnology,  National Research Council (CNR), Milano.)

      AbstractThe  seeds of cereals (cultivated grasses) are the major global source of food  proteins. All plants contain genes encoding two classes of seed storage proteins  that accumulate in the cell vacuoles: 2S albumins and 7/11S globulins. In  grasses, which evolved relatively recently, a new class of storage proteins has  appeared: the highly polymeric prolamins. In most cases, this has also involved  a switch of the subcellular compartment of accumulation, from vacuoles to the  endoplasmic reticulum. Prolamins have mainly originated form 2S albumins by the  insertion of new protein domains, but whole genome duplication events have  increased prolamin polymorphism, allowing changes in the molecular organization  of these protein hetelopolymers in the endoplasmic reticulum. Overall, these  evolutionary events have changed the workload of the endoplasmic reticulum,  possibly resulting in changes in the activation of the unfolded protein  response, which regulates the synthesis of folding helpers in this subcellular  compartment. Efforts aimed at improving the nutritional quality of seeds by  protein engineering should take into consideration these molecular aspects of  protein accumulation.

      Talk  2

      TitleUnveiling  salt-tolerance mechanisms in Italian rice varieties

      SpeakerFiorella  Lo Schiavo (Full Professor of Plant Physiology, University of Padua, Faculty of  Science,Dept.  of Biology, Padova, Italy.)

      Abstract

      Salinity  tolerance has been extensively investigated in recent years due to its  agricultural importance.Soil  salinization isthreatening  crop productivity worldwide and, in particular, is reducing rice yields, being  it the most salt-sensitive cereal.Plant  tolerance to salinity is a multifaceted trait involving complex physiological  features, metabolic pathways, and gene networks.

      A  physiological, molecular and cellular characterisation of two Italian rice  varieties showing contrasting salt sensitivity will be presented, with a  particular focus on the early events induced by salt stress in the two  varieties.

      Signalling  networks that perceive, transmit and integrate information have to translate  environmental cues into an appropriate cellular programme.

      The  aim of our recent work is to decode initial signals induced by salt stress that  are leading to an adaptive programme in the tolerant variety and a senescent  programme in the sensitive one.

        

        

        

      The  seminar will be delivered in English.


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