MATERNAL EFFECTS ON BUGLOSSOIDES ARVENSIS (BORAGINACEAE) SEEDLING TRAITS

LONGÁS, MARÍA DE LAS MERCEDES; CHANTRE, GUILLERMO RUBÉN; SABBATINI, MARIO RICARDO

Corrientes

Congreso; XXXI REUNIÓN ARGENTINA DE FISIOLOGÍA VEGETAL Enfrentando el cambio climático, haciendo sostenible la productividad agro-forestal; 2016

ASOCIACIÓN SOCIEDAD ARGENTINA DE FISIOLOGÍA VEGETAL

Weed species develop diverse ecological strategies to enhance their fitness under unpredictable environmental conditions.Such conditions during seed development on the mother plants influence the phenotypic traits of the progeny. Maternal effects have a marked influence during the initial phases of the weed´s life cycle, such as the seedling stage. Buglossoides arvensis is a facultative winter annual weed species present in cereal crops of the Semiarid Temperate Region of Argentina. The aim of this work was to determine the effect of different maternal environments on seedling emergence percentage and seedling size of the progeny. Two experiments were performed separately in order to evaluate the effect of (i) different light intensity levels (0, 37 and 67 % neutral shade) and (ii) two contrasting soil irrigation regimes (water-stress vs. non-restrictive soil water supply) under different nitrogen fertilization levels (0, 75 and 150 Kg N ha-1). Obtained results showed a reduction in the emergence percentage of the progeny as maternal light intensity and soil nitrogen supply was reduced (p