title: The influence of light intensity and photoperiod on duckweed biomass and starch accumulation for bioethanol production.
abstract: Duckweed has been considered as a valuable feedstock for bioethanol production due to its high biomass and starch production. To investigate the effects of light conditions on duckweed biomass and starch production, Lemna aequinoctialis 6000 was cultivated at different photoperiods (12:12, 16:8 and 24:0h) and light intensities (20, 50, 80, 110, 200 and 400μmolm(-2)s(-1)). The results showed that the duckweed biomass and starch production was increased with increasing light intensity and photoperiod except at 200 and 400μmolm(-2)s(-1). Considering the light cost, 110μmolm(-2)s(-1) was optimum light condition for starch accumulation with the highest maximum growth rate, biomass and starch production of 8.90gm(-2)day(-1), 233.25gm(-2) and 98.70gm(-2), respectively. Moreover, the results suggested that high light induction was a promising method for duckweed starch accumulation. This study provides optimized light conditions for future industrial large-scale duckweed cultivation.
authors.affiliation: Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Yehu
authors.initials: Y
authors.lastname: Yin
authors.affiliation: Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China.
authors.forename: Changjiang
authors.initials: C
authors.lastname: Yu
authors.affiliation: Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Yu
authors.affiliation: Qingdao Institute of Animal Sciences, Qingdao 266100, PR China.
authors.forename: Jinshan
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Beijing Risun Chemical Industry Technology Research Institute Co. Ltd, Beijing 100070, PR China.
authors.forename: Changjiang
authors.initials: C
authors.lastname: Sun
authors.affiliation: Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China. Electronic address: mayb@qibebt.ac.cn.
authors.forename: Yubin
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China. Electronic address: zhougk@qibebt.ac.cn.
authors.forename: Gongke
authors.initials: G
authors.lastname: Zhou
mesh_terms: D029064:Araceae / Q000382:microbiology* / Q000502:physiology* / Q000528:radiation effects; D056804:Biofuels / Q000382:microbiology* / Q000528:radiation effects; D018533:Biomass; D004307:Dose-Response Relationship, Radiation; D000431:Ethanol / Q000302:isolation & purification / Q000378:metabolism*; D008027:Light; D017440:Photoperiod; D010788:Photosynthesis / Q000502:physiology / Q000528:radiation effects; D011829:Radiation Dosage; D013213:Starch / Q000378:metabolism*
chemical_list: D056804:Biofuels; D000431:Ethanol; D013213:Starch
keywords: Duckweed; Lemna aequinoctialis; Light intensity; Photoperiod; Starch production