the effect of hydropriming and halopriming on germination and early growth stage of wheat (triticum aestivum l.)

in order to study of hydropriming and halopriming on germination and early growth stage of wheat (triticum aestivum l.) an experiment was carried out in laboratory of the department of agronomy and plant breeding, shahrood university of technology. seed treatments consisted of t1: control (untreated seeds), t2: soaking in distilled water for 18 h (hydropriming). t3: soaking in -1.2 mpa solution of caso4 for 36 h (halopriming). germination and early seedling growth were studied using distilled water (control) and under osmotic potentials of -0.4, -0.8 and -1.2 mpa for nacl and polyethylene glycol (peg 6000), respectively. results showed that hydroprimed seeds achieved maximum germination seedling dry weight, especially during the higher osmotic potentials. minimum germination was recorded at untreated seeds (control) followed by halopriming. under high osmotic potentials, hydroprimed seeds had higher gi (germination index) as compared to haloprimed or untreated seeds. interaction effect of seed treatment and osmotic potential significantly affected the seedling vigour index (svi).