Abstract:

Cassava is valued as an important subtropical food/energy crops. In order to select the best methods of cassava (Manihot esculenta Crantz) to evaluate drought system, we use analysis techniques of correlation and discrimination to study the relationship between physio-biochemical and drought resistance of the cassava leaves. Results showed that, PS Ⅱ photochemical efficiency (Fv/Fm) declined and the contents of abscisic acid (ABA) increased to different degree depending on the genotypes. Based on several physiological indexes, the drought tolerance of 3 tested cassava varieties was preliminarily evaluated that SC5 had the highest tolerant and SC124 had the most sensitive.