| dc.description.abstract | In Indonesia, investigations of drought-tolerant cassava by characterizing the morphological, physiological, and molecular
responses have not been carried out. This research was aimed to characterize the morphological, physiological, and molecular
features of 10 Indonesian cassava varieties (Adira 1, Malang 1, Cimanggu, Kaspro, Ketan, Litbang UK-2, Malang 4, Malang 6, UJ-3,
and UJ-5) under drought stress. 30 days after planting, drought stress was applied by stopping irrigation of plants for 15 days. The
plant height, root system, and wilting were measured as morphological responses of cassava. For physiological responses, the
percentage of opening stomata, chlorophyll, and hydrogen peroxide (H2O2
) content were also investigated. Gene expression of
MeGBF3 and MeMSD was evaluated to analyze the response of candidate drought-tolerant genotypes. The studied parameters
revealed that drought stress inhibits the growth of cassava. Some genotypes could not survive because the excessive content of
H2O2 would be toxic to plant cells and disturb the plant growth. The up-regulated gene expressions of MeGBF3 and MeMSD has
correlations with morphological and physiological responses of cassava to drought stress. Adira 1 and Kaspro are thought as
drought-tolerant genotypes due to the morphological, physiological, and molecular responses | en_US |
