초록
<P><I>Laminaria</I> residues are major wastes during the production of alginate, mannitol and iodine by the kelp industry. To explore the capability of using <I>Laminaria</I> residues for microbial lipid production, here we developed an effective hydrolysis process to prepare <I>Laminaria</I> residue hydrolysates (LRH). Ten oleaginous yeast strains were then screened on agar plates using LRH as the sole nutrient sources. Two strains, <I>Rhodosporidium toruloides</I> Y4 and <I>Rhodotorula glutinis</I> AS 2.107, were found to use LRH for lipid production when phosphorus was removed, and lipid yields and cellular lipid contents reached 0.16 g g<SUP>−1</SUP> total reducing sugar (TRS) and 37.6%, and 0.07 g g<SUP>−1</SUP> TRS and 22.2%, respectively. The lipid products had similar fatty acid composition profiles to those of vegetable oils. Our results demonstrate the potential of integrating lipid-based biofuel production and the kelp industry, which should facilitate more efficient utilization of macroalgae resources such as <I>Laminaria</I> and related marine biomass.</P>