Enhancing starch production of a marine green microalga Tetraselmis subcordiformis through nutrient limitation

Changhong Yao, Jiangning Ai, Xupeng Cao, Song Xue, Wei Zhang

    Research output: Contribution to journalArticlepeer-review

    108 Citations (Scopus)

    Abstract

    Microalgal starch is a potential feedstock for biofuel production. The effects of KNO 3 and MgSO 4 concentrations and light intensity on biomass and starch production by the marine microalga, Tetraselmis subcordiformis, were investigated. Under 200μmolm -2s -1 irradiance and sulfur-deprived conditions, a starch productivity of 0.62gL -1d -1 and a starch content of 62.1% based on dry weight (DW) was achieved. A starch content of 54.3% was achieved under low irradiance and nitrogen starvation, which was 6.5% higher than that under nutrient- and light-sufficient conditions. Photosynthetic activity was indispensable for starch accumulation. It is difficult to reach high starch productivity and starch concentration simultaneously. Proper nutrient concentrations are necessary to achieve high starch productivity or starch concentration based on the target. The high starch productivity and starch content suggest that T. subcordiformis is a promising microalgal starch producer.

    Original languageEnglish
    Pages (from-to)438-444
    Number of pages7
    JournalBioresource Technology
    Volume118
    DOIs
    Publication statusPublished - Aug 2012

    Keywords

    • +N+S
    • -N
    • -S
    • ASW
    • ASW-N-S
    • DW
    • HI
    • LI
    • Microalgal starch
    • Nutrient limitation
    • Starch productivity
    • Tetraselmis subcordiformis

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