title: Enhancement of microalgae growth and fatty acid content under the influence of phytohormones.
abstract: The growth of Scenedesmus obliquus improved with increase in phytohormones concentrations (10(-8)-10(-)(5)M). Indole-3-acetic acid (IAA) supported the maximum growth at 10(-5)M with 17.7×10(6)cells/mL and total fatty acid of 97.9mg/g-DCW, enhancing the growth by 1.9-fold compared to control (9.5×10(6)cells/mL). While 10(-5)M of a newly discovered phytohormone Diethyl aminoethyl hexanoate (DAH) demonstrated a 2.5-fold higher growth with 23.5×10(6)cells/mL and a total fatty acid content of 100mg/g-DCW. Poly-unsaturated fatty acid content increased up to 56% and 59% at 10(-)(5)M of IAA and DAH, respectively. The highest carbohydrate content (33% and 34%) achieved at 10(-8)M and 10(-5)M of IAA and DAH, respectively. While, the highest protein content (34% and 35%) obtained at 10(-8)M of IAA and DAH, respectively. The current investigation demonstrates that phytohormones accelerate microalgal growth and induce the quality and quantity of fatty acid content for biodiesel production.
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea.
authors.forename: El-Sayed
authors.initials: ES
authors.lastname: Salama
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea.
authors.forename: Akhil N
authors.initials: AN
authors.lastname: Kabra
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea.
authors.forename: Min-Kyu
authors.initials: MK
authors.lastname: Ji
authors.affiliation: School of Chemical and Biomolecular Engineering, Pusan National University, Busan 609-735, South Korea.
authors.forename: Jung Rae
authors.initials: JR
authors.lastname: Kim
authors.affiliation: Department of Environmental Science and Engineering, Kyung Hee University, 1 Seocheon-dong, Yongin-si, Gyeonggi-do 446-701, South Korea.
authors.forename: Booki
authors.initials: B
authors.lastname: Min
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea. Electronic address: bhjeon@hanyang.ac.kr.
authors.forename: Byong-Hun
authors.initials: BH
authors.lastname: Jeon
mesh_terms: D020418:Algal Proteins / Q000032:analysis; D001709:Biotechnology / Q000191:economics; D002208:Caproates / Q000494:pharmacology; D002241:Carbohydrates / Q000032:analysis; D003470:Culture Media / Q000494:pharmacology; D005227:Fatty Acids / Q000378:metabolism*; D005240:Feasibility Studies; D007210:Indoleacetic Acids / Q000494:pharmacology; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000494:pharmacology*; D044444:Scenedesmus / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D020418:Algal Proteins; D002208:Caproates; D002241:Carbohydrates; D003470:Culture Media; D005227:Fatty Acids; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; C572218:diethyl aminoethyl hexanoate; C030737:indoleacetic acid
keywords: Carbohydrate; Fatty acids; Phytohormones; Protein; Scenedesmus obliquus