Effects of Two Potential Allelochemicals on the Photosystem II of Nitzschia closterium and Monostroma nitidum

作     者：Bowen Huang Enyi Xie Yu Ran Xinyi Chen Yongjian Huang Jianjun Cui 

作者机构：Fishery CollegeGuangdong Ocean UniversityZhanjiang524088China 

出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)

年 卷 期：2023年第92卷第1期

页      面：251-269页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 

基　　金：sponsored by the Ph.D.Start-Up Foundation of Guangdong Ocean University(R19049) Science and Technology Planning Project of Guangdong(2017A030303078) Undergraduate Start-Up Foundation of Guangdong Ocean University(580520135 and 570119011) 

主　　题：Allelochemicals 2-hydroxycinnamic acid quinic acid Nitzschia closterium Monostroma nitidum photosynthetic system 

摘      要：In aquaculture,high-density seaweed farming brings higher economic benefits but also increases outbreaks of diatom *** effective control of diatom felt in high-density seaweed farming has always been a research *** study selected two potential allelochemicals 2-hydroxycinnamic acid and quinic acid to explore their effects on a diatom Nitzschia closterium and an economic seaweed Monostroma *** results showed that 2-hydroxycinnamic acid had better inhibitory effects than quinic acid on the growth,pigment content and photosynthetic efficiency of *** half-maximal inhibitory concentrations at 120 h(IC_(50–120 h))were 0.9000 and 1.278 mM,***,these allelochemicals had limited inhibitory effects on the growth,pigment content and photosynthetic efficiency of *** before 24 *** further explore the allelopathic effect of these chemicals,this study focused on the photosystem II energy fluxes of *** was found that 3 mM 2-hydroxycinnamic acid could destroy the whole photosynthetic system by devastating the PSII reaction centre(RC)before 24 h;however,the same concentration of quinic acid could only down-regulate the electron transport efficiency by changing the effective antenna size of an active RC and downregulating the PSII reaction centre *** experimental results are expected to provide a new strategy to control diatom felt blooms on the high-density seaweed farming areas.