2018 : Microalgae Growth and Morphology of Skeletonema costatum on Physiological Stress Nutrient Silicon (Si)2018 : Microalgae Growth and Morphology of Skeletonema costatum On Physiological Stress Nutrient Silicon (Si)

Ir. Sri Nurhatika M.P
Dr. Tutik Nurhidayati S.Si,M.Si.
Kristanti Indah Purwani S.Si., M.Si
Dini Ermavitalini S.Si., M.Si


One type of microalga that can be cultivated as biodiesel raw material candidate is Skeletonema costatum. This study aims to determine the effect of nutrition physiological stress on the growth and 1,150,000 cells/ml at 72 hours and the lowest cell density in the treatment of stress that without the provision of Si of 550,000 cells/ml. Based on Dunnet test there was no significant difference between the growth of S. costatum the treatment of stress control treatment with 25% Si and 50% Si stress, but there was a significant difference in growth between the control and the treatment of stress Si 75% and 100%. S. costatum microalgae morphology can be seen that with the increasing stress of nutrient Si indicates cell lysis much experience.