数字农科院2.0

Effects of Culture Medium Enrichment with Zinc on Astaxanthin Accumulation in a New Strain of the Microalga Dysmorphococcus globosus

文献类型： 外文期刊

作者： Zhaohui Zan;Xinxin Huang;Zahid Hussain;Moyu Zhong;Chenyang Hou;Maozhi Ren;Xiulan Xie

作者机构：

关键词： astaxanthin;hidden starvation;microalgae;nutritional value;one health;zinc adsorption capacity;zinc enrichment

期刊名称： Plants

ISSN： 2223-7747

年卷期： 2024 年 13 卷 23 期

页码：

收录情况： SCIE（2024版）

摘要： High Zn2+ concentrations in microalgal cells that produce astaxanthin as a feed additive can reduce the symptoms of malnutrition in aquatic animals. Therefore, in this study, we analysed the effect of Zn2+ in the culture medium on the growth of a newly isolated microalgal strain Dysmorphococcus globosus ZY24. Zn2+ and white light stress altered the pigment content in microalgal cells. In addition, high Zn2+ concentrations in the culture medium altered cell morphology and chlorophyll fluorescence and also increased intracellular Zn2+ accumulation. Further, an optimal Zn2+ concentration in the culture medium promoted the synthesis of astaxanthin and other pigments. When the concentration of Zn2+ was 45.5 mg L−1, Dysmorphococcus globosus ZY24 produced 0.31 mg g−1 astaxanthin, whereas the total zinc content of the microalgae was 4337 mg kg−1. This study confirmed that microalgae have a high capacity for Zn2+ enrichment, providing a theoretical basis for studying Zn2+ enrichment in microalgae. Furthermore, Zn2+ supplementation to stimulate astaxanthin production in microalgae is a practical method to enhance their nutritional value.

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