Towards sustainable spirulina farming: Enhancing productivity and biosafety with a salinity-biostimulants strategy

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-01-06 DOI:10.1016/j.biortech.2025.132043

Chunli Yu, Jiahui Zheng, Yuqin Zhang, Yao Hu, Wei Luo, Jing Zhang, Jianfeng Yu, Jin Liu, Peter J. Nixon, Wenguang Zhou, Shengxi Shao

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引用次数: 0

Abstract

Arthrospira platensis (spirulina) is pivotal to the global microalgae industry, valued for its nutritional and bioactive properties. However, its sustainable production is challenged by freshwater scarcity and biological contaminants. This study introduces a salinity-biostimulants strategy to adapt a freshwater spirulina strain, CBD05, to near-seawater salinity (3 %). Exogenous glycine betaine (GB) and nitric oxide (NO), typical salinity enhancers, improved biomass productivity (0.36 g L−1 d−1), C-phycocyanin (C-PC) yield (83 mg L−1 d−1), and the economic output-to-input ratio was significantly enhanced. Metabolomic analysis linked salt tolerance to elevated amino acid accumulation, protein synthesis, and glycolysis, while transcriptional evidence highlighted enhanced carbon fixation and nitrogen assimilation towards C-PC synthesis upon addition of GB and NO. This strategy also demonstrated high resistance to Microcystis aeruginosa, a common contaminant in open systems. It provides a sustainable and cost-effective approach for industry-oriented spirulina production in freshwater-limited regions.

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走向可持续螺旋藻养殖：提高生产力和生物安全与盐-生物刺激剂战略

Arthrospira platensis（螺旋藻）是全球微藻产业的关键，因其营养和生物活性特性而受到重视。然而，其可持续生产受到淡水短缺和生物污染物的挑战。本研究介绍了一种盐度生物刺激剂策略，使淡水螺旋藻菌株CBD05适应接近海水的盐度（3%）。外源甜菜碱（GB）和一氧化氮（NO）是典型的盐度增强剂，提高了生物量生产力（0.36 g L−1 d−1），c -藻蓝蛋白（C-PC）产量（83 mg L−1 d−1），经济产出投入比显著提高。代谢组学分析将耐盐性与氨基酸积累、蛋白质合成和糖酵解的增加联系起来，而转录证据则强调了添加GB和NO后碳固定和氮同化对C-PC合成的增强。该策略还显示出对开放系统中常见污染物铜绿微囊藻（Microcystis aeruginosa）的高抗性。它为淡水有限地区以工业为导向的螺旋藻生产提供了可持续和具有成本效益的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.