cell population phenotype increased septation index FYPO:0000650 septated 2011-10-13T12:34:42Z increased septation increased number of septated cells A cell population phenotype in which the septation index is higher than normal. The septation index is the proportion of the population undergoing septation at any given time, and is usually around 10% (varying between 7-15%) for wild type. midori abnormal phenotype