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Adverse Effect of TiO2 Nanoparticles on Antioxidant System and Antitumor Activities of Macroalgae Gracilaria lemaneiformis

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Journal of Ocean University of China 2019年第5期18卷 1130-1138页

作者： LIU Jie YIN Pinghe ZHAO Ling Department of Chemistry Jinan UniversityGuangzhou 510632China Research Center of Analysis and Test Jinan UniversityGuangzhou 510632China Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation of Guangdong Higher Education Institutes Department of Environmental EngineeringJinan UniversityGuangzhou 510632China

Recently,the widespread use of TiO2 nanoparticles(nano-TiO2)has attracted the global concern regarding their adverse effects to aquatic *** may get to the aquatic environments and harm the growth of *** paper presents the studies of nano-TiO2 concentrations influence on the photosynthetic characteristics,antioxidant system and antitumor activity of marine macroalgae Gracilaria lemaneiformis after exposed to 0,5,10,20 or 40 mg L^-1 of *** showed that the photosynthetic pigment content of *** obviously decreased and the antioxidant defense system was significantly disturbed after exposure to *** with control,the maximum level of malondialdehyde showed 3.3-fold increase for 15 days exposure to *** activity of superoxide dismutase and catalase enhanced obviously by *** aqueous extract of ***(AEGL)possesses anticancer activity against HepG2 liver cancer cells proliferation and the 48 h-cell inhibition exceeds 35%.But the toxicity of nano-TiO2 would inhibit the anticancer activity of *** *** was exposed to nano-TiO2,the effect of the aqueous extract of *** on the cell inhibition,reactive oxygen species production,apoptosis,cycle arrest of HepG2 cells significantly lessened,and which were linearly associated with nano-TiO2 exposure *** results further confirmed that nano-TiO2 can inhibit the anticancer activity of *** results in this work imply that macroalgae can be an effective biomarker of nano-TiO2 contaminant,and can be useful indicator to evaluate ecological effects of increasing pollutants in marine ecosystem.

关键词： anticancer activity Gracilaria lemaneiformis macroalgae nanoparticles oxidative damage photosynthetic pigment

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Structure of reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis (Gracilariaceae,Rhodophyta)

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Science China(Life Sciences) 2008年第12期51卷 1137-1143页

作者： XU Di1, ZHU JianYi2, HE Yang1, CHENG XiaoJie1, ZHANG WenYan1 & ZHANG XueCheng1 1 College of Life Sciences, Ocean University of China, Qingdao 266003, China 2 Department of Biology, Changshu Institute of Technology, Changshu 215500, China College of Life Sciences Ocean University of China Qingdao China Department of Biology Changshu Institute of Technology Changshu China

Reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis collected from Qingdao city were studied with a light and a transmission electron microscope. The special superficial arrangement of spermatangium for this species was clearly observed, and the ultrastructure of spermatangial devel-opment revealed the similar cytodynamic pattern followed by all the Gracilariaceae members devel-oped from spermatangial mother cells to spermatangium. The female reproductive apparatus before fertilization was also observed and trichogyne was found protruding above the cortex, contrary to the earlier reports. Tetrasporangium was formed by an outer cortical cell and the tetraspores became spherical and expended after being released.

关键词： Gracilaria/Gracilariopsis lemaneiformis ultrastructure reproductive apparatus

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CLONING AND ANALYSIS OF PHYCOERYTHRIN GENES IN GRACILARIA lemaneiformis (RHODOPHYCEAE)

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Chinese Journal of Oceanology and Limnology 2000年第1期18卷 42-46页

作者：隋正红张学成 College of Marine Life Sciences Ocean University of Qingdao Qingdao China

Cloning and sequencing of the genes coding for the α and β subunit of phycoerythrin (PE) of a red alga- Gracilaria lemaneiformis (GL) are reported. Alignment of 1084 nucleotides sequenced with three known red algal PE genes, Rhodella violacea (RV), Polysiphonia boldii (PB) and Aglaothamnion neglectum (AN), showed high level of conservation, and similarities of 77.6% (between GL and RV), 77.9% (GL and AN) and 79.0% (GL and PB). The similarities of amino acids were 84.8% (between GL and RV), 85.7% (GL and PB), and 80.6% (AN and GL), higher than those among nucleotides.

关键词： gene cloning Gracilaria lemaneiformis phycoerythrin Rhodophyceae

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APPLICATION OF RAPD IN GENETIC DIVERSITY STUDY ON GRACILARIA lemaneiformis Ⅲ.PHASE AND SEX RELATED MARKERS

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Chinese Journal of Oceanology and Limnology 1998年第S1期16卷 147-151页

作者：李向峰隋正红张学成 College of Marine Life Sciences Ocean University of Qingdao Qingdao China

Random amplification of polymorphic DNA (RAPD) was conducted by using 10 ran-dom primers (P-1 to P-10) in Gracilaria lemaneiformis. Phase and sex specific bands were amplified byprimers P-2, P-6, P-7 and P-8: for P-2 a 1 .4 kb band was found in female gametophytes and tetrasporo-phytes, for P-6, a 0.6 kb band appeared in male gametophytes and tetrasporophytes; for P-7, a 0. 76 kbband appeared in male gametophytes and tetrasporophytes; for P-7, a 0.72 kb band appeared in femalegametophytes and tetrasporophytes; for P-8, a 0. 73 kb band only appeared in male gametophytes.

关键词： Gracilaria lemaneiformis phase related markers RAPD sex related markers

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龙须菜在滩涂贝藻混养系统中的生态作用模拟研究

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海洋科学 2006年第12期30卷 72-76页

作者：孙伟张涛杨红生刘保忠周毅刘鹰中国科学院海洋研究所

2005年5-7月,在室内采用实验生态学方法对壳长为48.35 mm±4.27 mm文蛤(Meretrix meretrix Linnaeus)成贝和龙须菜(Gracilaria lemaneiformis Weber-van Bosse)的4种配比(生物量配比分别为0∶1、1∶1、2∶1、4∶1)进行了混养实验,每周测定养殖水体中营养盐变化情况以及文蛤、龙须菜的存活和生长情况等。实验表明,加入了大型藻类的文蛤养殖系统,相对于空白对照组,其氨氮、亚硝氮和磷酸盐浓度显著降低,NH4-N从5.52μmol/L降至1.30μmol/L、NO2-N从0.31μmol/L降至0.06μmol/L,而PO4-P从0.48μmol/L降至0.006μmol/L。实验结束后,文蛤及龙须菜生长情况良好,文蛤特定生长率最高达到了0.84%,龙须菜最高则达到了1.79%。本实验条件下,在文蛤成贝养殖系统中加入大型藻类,对养殖水体中的NH4-N、NO2-N、PO4-P有明显的吸收效果,吸收率分别为86%、98%和99%,起到了良好的生态作用。

关键词：文蛤(Meretrix meretrix Linnaeus) 龙须菜(Gracilaria lemaneiformis Weber-van Bosse) 混养生态作用

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