Passive leakage dominates cadmium-induced release of dissolved extracellular organic matters from Chlorella vulgaris
文献类型： 外文期刊
作者： Zhang, Bingcong 1 ; Zhang, Lechen 1 ; Deng, Xiangyuan 3 ; Gao, Kun 3 ; He, Hehe 3 ; Mao, Bifei 3 ;
作者机构： 1.Jiangsu Univ Technol, Sch Resource & Environm Engn, Zhongwu Blvd 1801, Changzhou 213001, Peoples R China
2.Jiangsu Key Lab Elect Waste & New Energy Solid Was, Changzhou 213001, Peoples R China
3.Jiangsu Univ Sci & Technol, Sch Biotechnol, Jiangsu Key Lab Sericultural Biol & Biotechnol, Zhenjiang 212100, Peoples R China
4.Chinese Acad Agr Sci, Key Lab Silkworm & Mulberry Genet Improvement, Minist Agr & Rural Affairs, Sericultural Res Inst, Zhenjiang 212100, Peoples R China
关键词： Microalgae; Heavy metal; dEOM; Active excretion; Passive leakage
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.0； 五年影响因子：9.5 ）
ISSN： 0960-8524
年卷期： 2025 年 437 卷
页码：
收录情况： SCI
摘要： The production of microalgal dissolved extracellular organic matter (dEOM) is environmentally significant, yet the mechanism of its release under heavy metal stress remains unclear. In this study, Chlorella vulgaris dEOM production was quantitatively analyzed under 0-25 mg/L Cd2+ exposure across exponential-stationary phases. The results identified passive leakage as the dominant release mechanism across varying Cd2+ levels, primarily stemming from: (1) cell division processes during exponential growth under both low and high stress, and (2) membrane damage under high stress from exponential to stationary phase. Biomarker analysis-including changes in cell composition, reactive oxygen species, antioxidant levels, and malondialdehyde-provided mechanistic support for passive leakage. Conversely, active excretion showed no correlation with biomarker patterns, suggesting it contributed minimally to dEOM production. These findings establish passive leakage as the primary driver of microalgal dEOM release under Cd2+ stress, providing novel crucial insights for understanding organic matter production in aquatic systems..
- 相关文献
作者其他论文 更多>>
-
Time-controlled dual-stage strategy for bioproduction of high-purity (R-R) 2,3-butanediol and acetoin in Bacillus licheniformis
作者：He, Hehe;Deng, Xiangyuan;He, Hehe;Deng, Xiangyuan;Xu, Yinbiao;Li, Siyu;Shi, Guiyang;Li, Youran;Li, Siyu;Shi, Guiyang;Li, Youran;Li, Siyu;Shi, Guiyang;Li, Youran
关键词：2,3-Butanediol; Acetoin; Bioproduction; Bacillus licheniformis; Bioseparation
-
Dual flocculation strategy with pH adjustment for cost-effective algae harvesting
作者：Zhang, Bingcong;Fang, Ziyi;Chen, Jing;Wu, Rongping;Mao, Bifei;Mao, Bifei
关键词：Algae; Dual flocculation; pH; Extracellular organic matter; Cost estimate
-
Flocculation with intermittent dosing for enhanced microalgae harvesting
作者：Zhang, Bingcong;Wei, Zhenzhen;Mao, Bifei;Mao, Bifei
关键词：Algae flocculation; Intermittent dosing; Harvesting efficiency; Operational parameters; Floc analysis
-
Using nitrogen starvation and excess phosphorus for two-stage algae cultivation to improve butanol production of lipid-extracted algae
作者：Mao, Bifei;Deng, Xiangyuan;Gao, Kun;Mao, Bifei;Deng, Xiangyuan;Gao, Kun;Li, Guanghao;Wang, Mingmei;Zhang, Bingcong
关键词：Algae; Nitrogen; Phosphorus; Butanol; Amino acid
-
Listening to plant's Esperanto via root exudates: reprogramming the functional expression of plant growth-promoting rhizobacteria
作者：Feng, Haichao;Luo, Jiayu;Hou, Xueqin;Gao, Kun;Miao, Youzhi;Xu, Zhihui;Zhang, Nan;Shen, Qirong;Xun, Weibing;Zhang, Ruifu;Feng, Haichao;Fu, Ruixin;Su, Lv;Liu, Yunpeng;Zhang, Ruifu;Xu, Yu
关键词：plant growth-promoting rhizobacterium (PGPR); plant health; recruitment; reprogramming; root exudates
-
Hot air-assisted instant controlled pressure drop drying impact on the Maillard reaction-related physicochemical properties of apple slices
作者：Li, Xuan;Bi, Jinfeng;Wu, Xinye;Lyu, Jian;Gao, Kun;Guo, Chongting
关键词：
-
Jatrolignans C and D: New Neolignan Epimers from Jatropha curcas
作者：He, Yi-Lin;Huang, Pei-Zhi;Yang, Hong-Ying;Feng, Wei-Jiao;Gao, Kun;He, Yi-Lin;Li, Zhao-Cai
关键词：Euphorbiaceae; Jatropha curcas L; neolignan; jatrolignans; epimers; antichlamydial activity
