上海海洋大学学报2025，Vol.34Issue(5)：1029-1038,10.DOI:10.12024/jsou.20250404824
两种氨基酸类似物对拉氏尖头藻的抑藻作用
Algicidal effects of two amino acid analogs on the Raphidiopsis raciborskii
摘要
Abstract
Global warming has facilitated the expansion of the invasive cyanobacterium Raphidiopsis raciborskii to higher latitudes,while current studies on bloom control methods for this species remains limited.This study evaluated the algicidal effects of two amino acid analogs,L-3,4-dihydroxyphenylalanine(L-DOPA)and homoarginine(Har),on R.raciborskii and investigated their physiological impacts.Results showed that both compounds significantly induced reactive oxygen species(ROS)accumulation,with L-DOPA exhibiting stronger ROS stimulation than Har.Both analogs damaged the photosynthetic system:L-DOPA impaired the photosystem reaction centers,electron transport chain,and chlorophyll a(Chl.a),while significantly reducing phycobiliprotein(PBP)content but increasing the proportions of allophycocyanin(APC)and phycoerythrin(PE).L-DOPA treatment caused severe filament fragmentation(average length reduced to 9.70％of the control)and extensive cellular damage.In contrast,Har damaged the photosystem reaction centers and electron transport chain but promoted PBP synthesis and PE proportion,resulting in moderate filament breakage(22.33％of the control)and significant extracellular polymeric substance(EPS)secretion.This study demonstrates that both Har and L-DOPA effectively inhibit R.raciborskii,with L-DOPA exhibiting stronger algicidal activity,indicating that the two amino acid analogs exhibit distinct algicidal mechanisms.Our findings provide fundamental data for developing novel cyanobacterial bloom control technologies.关键词
左旋多巴/高精氨酸/入侵蓝藻/光合系统/胞外聚合物/活性氧Key words
L-DOPA/homoarginine/invasive cyanobacteria/photosynthetic system/extracellular polymeric substances/reactive oxygen species分类
农业科技引用本文复制引用
刘曈,刘慧敏,尹思成,张玮..两种氨基酸类似物对拉氏尖头藻的抑藻作用[J].上海海洋大学学报,2025,34(5):1029-1038,10.基金项目
国家重点研发计划(2022YFC2601305) （2022YFC2601305）
