本文主要研究内容
作者李超(2019)在《黄酮化合物对球形棕囊藻生长、光合活性的抑制效应及定量结构活性关系模型研究》一文中研究指出:近几十年来,我国近岸海域赤潮暴发日益频繁,严重危害海洋生态环境、渔业及近海旅游业等海洋经济的发展,也给人类健康构成了威胁。为了减轻和消除赤潮的不利影响,发展一种有效的、环境友好的控制赤潮暴发的方法已经成为水资源管理和维持水生生态系统稳定的迫切需求。黄酮化合物(flavonoids)作为一种化感物质在控制水华蓝藻方面效果显著,我们推测其在抑制赤潮藻生长方面也具有很大的潜力。因此,本文以19种黄酮化合物和典型赤潮藻种球形棕囊藻(Phaeocystis globosa)为研究对象,通过实验室研究测定了异黄酮类(isoflavone)、黄酮醇类(flavanone)、黄酮类(flavone)和二氢黄酮类(dihydroflavones)化合物对球形棕囊藻的抑制效应,对黄酮化合物抑制赤潮藻生长活性进行了探索性的筛选研究;通过定量构效关系(quantitative structure activity relationship,QSAR)方法探讨了黄酮化合物的理论分子结构与抑藻活性的定量关系,为揭示黄酮化合物的分子结构对抑藻性能的影响机理有重要意义;并利用叶绿素荧光天然探针方法研究了藻细胞PS II反应中心光合活性对两种抑藻效果极佳的黄酮化合物(槲皮素、杨梅素)的响应,以期为发展赤潮暴发防治的新技术提供科学依据。主要研究结果如下:(1)19种黄酮化合物的半抑制浓度IC50.3d、IC50.5d以及IC50.7d范围分别为0.001~5.517 mg L-1、0.068~3.065 mg L-1及0.025~3.135 mg L-1,均能有效抑制球形棕囊藻生长。随着黄酮化合物浓度的增加(0.5 mg L-1~16.0mg L-1),其抑制效应也相应增强。对球形棕囊藻而言,抑藻活性较强的黄酮化合物主要包括槲皮素、黄酮、杨梅素和白杨素,而黄豆苷原、5-羟基黄酮、芹菜素和7-羟基黄酮等黄酮化合物的抑藻活性较弱。(2)黄酮化合物的抑藻活性与分子结构中羟基的位置有关,5-OH的引入能改善其抑藻活性,而4’-OH和3’-OH能削弱其抑藻活性;黄酮化合物的抑藻活性随着羟基对羰基的远离而增强。二氢黄酮类(dihydroflavones)及黄酮分子甲基化的化合物生物活性高于黄酮类化合物(flavone);黄酮类化合物的抑藻活性优于异黄酮类(isoflavone)。(3)基于S-MLR构建的QSAR模型通过了内部和外部检验,表明该模型具有较高的预测能力。分子描述符摩尔折射率(MR)、分配系数(PC)、最低未占有分子轨道(LUMO)及最高占据轨道(HOMO)是影响黄酮化合物抑藻活性的关键因子。(4)黄酮化合物在一定程度上胁迫了球形棕囊藻的光合系统,具体表现为槲皮素的最大光化学量子产量Fv/Fm、实际光化学量子产量Yield、最大相对电子传递速率rETRmax和光能利用效率α分别降低18%、26%、29%和28%;而杨梅素对球形棕囊藻光合活性的影响相对不明显。
Abstract
jin ji shi nian lai ,wo guo jin an hai yu chi chao bao fa ri yi pin fan ,yan chong wei hai hai xiang sheng tai huan jing 、yu ye ji jin hai lv you ye deng hai xiang jing ji de fa zhan ,ye gei ren lei jian kang gou cheng le wei xie 。wei le jian qing he xiao chu chi chao de bu li ying xiang ,fa zhan yi chong you xiao de 、huan jing you hao de kong zhi chi chao bao fa de fang fa yi jing cheng wei shui zi yuan guan li he wei chi shui sheng sheng tai ji tong wen ding de pai qie xu qiu 。huang tong hua ge wu (flavonoids)zuo wei yi chong hua gan wu zhi zai kong zhi shui hua lan zao fang mian xiao guo xian zhe ,wo men tui ce ji zai yi zhi chi chao zao sheng chang fang mian ye ju you hen da de qian li 。yin ci ,ben wen yi 19chong huang tong hua ge wu he dian xing chi chao zao chong qiu xing zong nang zao (Phaeocystis globosa)wei yan jiu dui xiang ,tong guo shi yan shi yan jiu ce ding le yi huang tong lei (isoflavone)、huang tong chun lei (flavanone)、huang tong lei (flavone)he er qing huang tong lei (dihydroflavones)hua ge wu dui qiu xing zong nang zao de yi zhi xiao ying ,dui huang tong hua ge wu yi zhi chi chao zao sheng chang huo xing jin hang le tan suo xing de shai shua yan jiu ;tong guo ding liang gou xiao guan ji (quantitative structure activity relationship,QSAR)fang fa tan tao le huang tong hua ge wu de li lun fen zi jie gou yu yi zao huo xing de ding liang guan ji ,wei jie shi huang tong hua ge wu de fen zi jie gou dui yi zao xing neng de ying xiang ji li you chong yao yi yi ;bing li yong xie lu su ying guang tian ran tan zhen fang fa yan jiu le zao xi bao PS IIfan ying zhong xin guang ge huo xing dui liang chong yi zao xiao guo ji jia de huang tong hua ge wu (hu pi su 、yang mei su )de xiang ying ,yi ji wei fa zhan chi chao bao fa fang zhi de xin ji shu di gong ke xue yi ju 。zhu yao yan jiu jie guo ru xia :(1)19chong huang tong hua ge wu de ban yi zhi nong du IC50.3d、IC50.5dyi ji IC50.7dfan wei fen bie wei 0.001~5.517 mg L-1、0.068~3.065 mg L-1ji 0.025~3.135 mg L-1,jun neng you xiao yi zhi qiu xing zong nang zao sheng chang 。sui zhao huang tong hua ge wu nong du de zeng jia (0.5 mg L-1~16.0mg L-1),ji yi zhi xiao ying ye xiang ying zeng jiang 。dui qiu xing zong nang zao er yan ,yi zao huo xing jiao jiang de huang tong hua ge wu zhu yao bao gua hu pi su 、huang tong 、yang mei su he bai yang su ,er huang dou gan yuan 、5-qiang ji huang tong 、qin cai su he 7-qiang ji huang tong deng huang tong hua ge wu de yi zao huo xing jiao ruo 。(2)huang tong hua ge wu de yi zao huo xing yu fen zi jie gou zhong qiang ji de wei zhi you guan ,5-OHde yin ru neng gai shan ji yi zao huo xing ,er 4’-OHhe 3’-OHneng xiao ruo ji yi zao huo xing ;huang tong hua ge wu de yi zao huo xing sui zhao qiang ji dui tang ji de yuan li er zeng jiang 。er qing huang tong lei (dihydroflavones)ji huang tong fen zi jia ji hua de hua ge wu sheng wu huo xing gao yu huang tong lei hua ge wu (flavone);huang tong lei hua ge wu de yi zao huo xing you yu yi huang tong lei (isoflavone)。(3)ji yu S-MLRgou jian de QSARmo xing tong guo le nei bu he wai bu jian yan ,biao ming gai mo xing ju you jiao gao de yu ce neng li 。fen zi miao shu fu ma er she she lv (MR)、fen pei ji shu (PC)、zui di wei zhan you fen zi gui dao (LUMO)ji zui gao zhan ju gui dao (HOMO)shi ying xiang huang tong hua ge wu yi zao huo xing de guan jian yin zi 。(4)huang tong hua ge wu zai yi ding cheng du shang xie pai le qiu xing zong nang zao de guang ge ji tong ,ju ti biao xian wei hu pi su de zui da guang hua xue liang zi chan liang Fv/Fm、shi ji guang hua xue liang zi chan liang Yield、zui da xiang dui dian zi chuan di su lv rETRmaxhe guang neng li yong xiao lv αfen bie jiang di 18%、26%、29%he 28%;er yang mei su dui qiu xing zong nang zao guang ge huo xing de ying xiang xiang dui bu ming xian 。
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论文作者分别是来自浙江大学的李超,发表于刊物浙江大学2019-07-07论文,是一篇关于黄酮化合物论文,抑藻活性论文,球形棕囊藻论文,模型论文,定量结构活性关系论文,光合活性论文,浙江大学2019-07-07论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自浙江大学2019-07-07论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:黄酮化合物论文; 抑藻活性论文; 球形棕囊藻论文; 模型论文; 定量结构活性关系论文; 光合活性论文; 浙江大学2019-07-07论文;