DORMANCY BREAKOUT IN ATRIPLEX CRENATIFOLIA SEED, UNDER LABORATORY CONDITION, USING CHEMICAL TREATAMEN

SOSA LR; VILLARREAL V; RODRIGUEZ RIVERA MF; MORICONI J I; LUCCHINI F; REALE MI; FERNANDEZ E A

Potrero de los Funes - San Luis - Argentina

Congreso; XXIV Reunión Anual de la Sociedad de Biología de Cuyo; 2006

Atriplex crenatifolia is native species of San Luis province. And which all native species the seeds present a noticeable state of dormance, which constitutes a disadvantage. Is important study the way of escarifications the seeds to increase the her germinations. The objetive of this work was to study dormancy breakout in A. crenatifolia seeds. The dispersal units of A. crenatifolia was collectated from plants native populations situted en Las Salinas del Bebedero, Province of San Luis. The dormancy breakout trials was soaking in H2SO4 at differents times: 0 min (control), 2:30 min, 5 min, 7 min and 10 min and next to wash under running water during 10 min . The treatments was carried out in glass Petri with double filtre paper, moinstened with 5 ml of water. Five replicates of 25 seeds each were used for each treatment. At 30ºC under conditions of darkness. Percentage of germination was recorded daily during 10 days. The results indicate that there was a significative effect in the germiative capacity with escarification treatment. The germinacions increase a 25 and 20% with treatment wiht H2SO4 during 2:30 and 5 min in relation to control. The seeds of A. crenatifolia request preliminary treatment to obtain a best germination.