Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 545161
Title Light regime and growth phase affect the microalgal production of protein quantity and quality with Dunaliella salina
Author(s) Sui, Yixing; Muys, Maarten; Vermeir, Pieter; Adamo, Sarah D'; Vlaeminck, Siegfried E.
Source Bioresource Technology 275 (2019). - ISSN 0960-8524 - p. 145 - 152.
DOI https://doi.org/10.1016/j.biortech.2018.12.046
Department(s) Bioprocess Engineering
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Food - Microalgae - Microbial protein - Photoperiod - Single-cell protein
Abstract

The microalga Dunaliella salina has been widely studied for carotenogenesis, yet its protein production for human nutrition has rarely been reported. This study unveils the effects of growth phase and light regime on protein and essential amino acid (EAA) levels in D. salina. Cultivation under 24-h continuous light was compared to 12-h/12-h light/dark cycle. The essential amino acid index (EAAI) of D. salina showed accumulating trends up to 1.53 in the stationary phase, surpassing FAO/WHO standard for human nutrition. Light/dark conditions inferred a higher light-usage efficiency, yielding 5–97% higher protein and 18–28% higher EAA mass on light energy throughout the growth, accompanied by 138% faster growth during the light phase of the light/dark cycle, compared to continuous light. The findings revealed D. salina to be especially suitable for high-quality protein production, particularly grown under light/dark conditions, with nitrogen limitation as possible trigger, and harvested in the stationary phase.

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