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Slightly acidic electrolyzed water significantly restrains the accumulation of the microalgae Pseudokirchneriella subcapitata in hydroponic systems

文献类型： 外文期刊

作者： Wu, Cuinan 1 ; Li, Yuanyuan 2 ; Wu, Xue 2 ; Bao, Encai 2 ; Ye, Lin 1 ; Cao, Kai 2 ;

作者机构： 1.Ningxia Univ, Agr Coll, Yinchuan 750021, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Key Lab Agr Engn Middle & Lower Reaches Yangtze Ri, Agr Minist, Nanjing 210014, Peoples R China

3.Chongqing Three Gorges Univ, Coll Biol & Food Engn, Chongqing 404000, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Peoples R China

关键词： hydroponics; algae growth; slightly acidic electrolyzed water; ROS

期刊名称：JOURNAL OF APPLIED MICROBIOLOGY （ 影响因子：4.0； 五年影响因子：4.3 ）

ISSN： 1364-5072

年卷期： 2024 年 135 卷 5 期

页码：

收录情况： SCI

摘要： Aims This study explored the effects of slightly acidic electrolyzed water (SAEW) on algae to exploit technologies that effectively suppress algal growth in hydroponic systems and improve crop yield.Methods and Results The effects of SAEW on algal growth and the response mechanisms of algae to SAEW were investigated. Moreover, we studied whether the application of SAEW adversely affected tomato seedling growth. The results showed that SAEW significantly inhibited algal growth and destroyed the integrity of the algal cells. In addition, the intracellular oxidation-reduction system of algae was greatly influenced by SAEW. The H2O2, O2-, malondialdehyde (MDA), and reactive oxygen species (ROS) fluorescence signals were significantly induced by SAEW, and superoxide dismutase (SOD), peroxidase (POD), and glutathione reductase (GR) activities were greatly enhanced by a low SAEW concentration but significantly inhibited by SAEW with a high available chlorine concentration, which may contribute to heavy oxidative stress on algal growth and cell structure break down, eventually causing the death of algae and cell number decrease. We also found that regardless of the concentration of SAEW (from 10 to 40 mg L-1), there was no significant change in the germination index, length, or fresh weight of the hydroponic tomato seedlings.Conclusions Our findings demonstrate that SAEW can be used in hydroponic systems to restrain algae with no negative impact on tomato plants.

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