ENDOCYTOSIS IS REQUIRED DURING EARLY GERMINATION IN Arabidopsis thaliana

PAGNUSSAT, L.; DE LA CANAL L

Puerto Madryn, Chubut

Congreso; XLVI REUNION ANUAL SAIB; 2010

Sociedad Argentina de Investigación Bioquímica

Endocytosis is required to overcome a variety of cellular functions, including the uptake of extracellular molecules, intercellular signal transduction, and regulation of receptors on the plasma membrane and establishment of cell polarity. During germination,  the rapid change from a metabolically resting state  to  the active condition requires not only the synthesis-a comparative slow process- but the recruitment  of  several  molecules  that  has  been  strategically separated from its target localization during seed maturation. We have previously demonstrated  that an extracellular  lipid  transfer protein from sunflower seeds is internalized by endocytosis upon germination. This process probed to be conserved between species, since Arabidopsis  seeds also  internalized an endocytosis marker during imbibition. In this work we demonstrate the internalization of  rhamnogalacturonan-II  upon  early  imbibition  in Arabidopsis seeds.