Physiological and growth response traits to water deficit as indicators of tolerance criteria between quinoa genotypes

The growth of crops is dependent on water availability,therefore,plant act by different mechanisms to overcome drought stress. here,physiological and growth responses of six genotypes of chenopodium quina to water stress were investigated in field condition under four irrigation treatments (100%etc; 50%etc; 33%etc and rainfed). results show that the six genotypes display different levels of tolerance to water stress.. both tolerant genotypes l143 and l119,responded to the increase of water stress by decreasing leaf water potential,stomatal conductance and leaf area index. furthermore,the chlorophyll a and b were increased in both genotypes. however,physiological traits indicate that under the half irrigated treatment (50%etc) quinoa plant present an interesting tolerance to water stress,so using just half water requirement we can get comparative results to the control. © 2017,university of mohammed premier oujda morocco.