Effects of Flood on the Growth and Some Aspects of Physiology of Five Genotypes of Cassava (Manihot esculentus)

Abstract

The effects of flood on five genotypes of Cassava (Manihot esculenta), TMEB419, 011371, I98058I, I30574 and 91934 was investigated for a period of twenty (21) days. The plants were subjected to flooding two months after establishment. Results revealed that there are three homogenous groups for chlorophyll A and chlorophyll B. It was observed that the effect of flooding on chlorophyll content of the various genotypes is dependent on time. The longer the duration of flooding the less quantity of chlorophyll in the plant. Genotype I30574 had the highest mean for relative water content in flooded condition (having an average of 90%). Genotypes with significant difference in Proline content between treatment and control showed insignificant difference in chlorophyll content. This suggests if flooded plants are treated with exogenous Proline, their chlorophyll content will be enhanced.