{"title":"Effect of Melatonin as a Bio-stimulant of Astaxanthin Production from Haematococcus","authors":"Ryuji Ueda, M. Wakisaka","doi":"10.3775/jie.101.132","DOIUrl":null,"url":null,"abstract":"To enhance productivity of microalgae Haematococcus as an only one producer from nature of anti-oxidative pigment of astaxanthin, effect of melatonin to biomass growth and astaxanthin production from Haematococcus lacustris was investigated under abiotic stress culture conditions of different light intensities. Biomass and astaxanthin production were enhanced to 11% and 25%, respectively with the addition of 1.0 mg L -1 of melatonin at initial stage of cultivation under high light intensity. Lower concentration of melatonin was effective for growth promotion by improving stress tolerance while higher concentration of melatonin exhibited growth inhibition. Melatonin could be categorized as a bio-stimulant since it was effective at significantly lower dosage compared to other types of additives.","PeriodicalId":17318,"journal":{"name":"Journal of The Japan Institute of Energy","volume":null,"pages":null},"PeriodicalIF":0.2000,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Japan Institute of Energy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3775/jie.101.132","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
To enhance productivity of microalgae Haematococcus as an only one producer from nature of anti-oxidative pigment of astaxanthin, effect of melatonin to biomass growth and astaxanthin production from Haematococcus lacustris was investigated under abiotic stress culture conditions of different light intensities. Biomass and astaxanthin production were enhanced to 11% and 25%, respectively with the addition of 1.0 mg L -1 of melatonin at initial stage of cultivation under high light intensity. Lower concentration of melatonin was effective for growth promotion by improving stress tolerance while higher concentration of melatonin exhibited growth inhibition. Melatonin could be categorized as a bio-stimulant since it was effective at significantly lower dosage compared to other types of additives.
为了从虾青素抗氧化色素的性质出发,提高微藻红球藻的产量,在不同光强的非生物胁迫培养条件下,研究了褪黑素对湖红球藻生物量生长和虾青素产量的影响。在高光强培养初期,添加1.0 mg L -1的褪黑素可使生物量和虾青素产量分别提高到11%和25%。低浓度的褪黑激素通过提高胁迫耐受性促进生长,而高浓度的褪黑激素则表现出生长抑制作用。与其他添加剂相比,褪黑素在较低的剂量下也能发挥作用,因此可以归类为生物刺激剂。