EFFECT OF SALT AND BORO STRESS ON SEED GERMINATION OF Chenopodium quinoa WILLD

PARERA V, GALLARDO L, PÉREZ CHACA MV, FERESÍN GE, PARERA CA

Congreso; XXXVI Reunión Científica Anual de la Sociedad de Biología de Cuyo; 2018

Quinoa (Chenopodium quinoa willd) is an ancíent Andean crop and could be a productive aitemative for irrigated areas in arid and semi -a¡id regions High levels.of .{r: -g Boron 1B), an essential micronutrient but toxic in excess, in soils are commonlv obserr"ed ir the Jáchal valley Qrlw of san Juan provináe¡. one of rhe*..r r*p".tr* effects of abiotic stresses #;ffi'|Jill overproduction ofreactive oxygel species (Ros)that cause celi death. The g".*iruiio, is the most crifical stages ofptant growth and has a direct impact on productiviry-. The aim was to evaluate the geráination percentage, germination velocify (GV), the emergerce rate index {ERI) and the activity of ascorbate peroxidase (AP"X), catalase'(cA!;;;a1""ái.iá"rrvá. (MDA) of c quinoa var' "Amarilla de Marangani" under conditionr_áf..t"r.0"" to íár*ity *¿ g. ile treatment *".. ólBr (l-50 mM ClNa+0"025% B): CiB2 (150^mM ClNa+0.075% B); C2Bl (200 mM ClNa+0.02 É,1,e);CZBZ(200 mM ClNa+0.075% B); C1B0 (150 mM ClNa)' c2B0 (200 mM clNa); c0Bl Q.025io B),-cOBz ioózlei and coBo (disrilled water corrrol). The experimental design was in random plots with five ieplicates oi zs se"ds p". t .ul*"n,. The number of germinated seeds was recorded every 24 h for one week. A seed was consideréd germinated r.rften tire .;;;irg radicie rvas longer than 2 mm. statistical aaalysis was performed using ANovA foilowed by LSD Fisher and rukey-Kramer"Multipte comparisons Test. The germination percentage was significantly higher in the ron-salts and boron freatment ¡"cono¡ compared with c lB2, c281, c2B2 and c2B0 treatments' similar results were observed in the ERI evaluation. The seeds gerrninateJunder the high ,oÁ.rt rtio, of ciNa and B (c282) aad C i 82 treahnent have a significant lower GV compared with ihe .e.i oi th. treaknenrs. The actrvity of cAT (prmol H,o2lmg protein min) and APX.(¡rmol Ascorbato/mg protein min) ir coBo treatment were significantly higher than the c2B2 treatment(p