%0 Journal Article
%T Effects of algicidal bacterium BS03 (Microbulbifer sp.) on the growth and antioxidant systems of Alexandrium tamarense<br>溶藻细菌BS03(Microbulbifer sp.)对塔玛亚历山大藻生长及抗氧化系统的影响
%A Fu Lijun
%A Li Dong
%A Wu Chengji
%A Zheng Tianling
%A <br>Fu L
%A Li D
%A Wu C
%A Zheng T
%J 微生物学报
%D 2012
%I 
%X Objective]We studied the algicidal mechanism of extracellular substances of algicidal bacteria strain BS03(Microbulbifer sp.) on photosynthetic characteristics,antioxident enzyme system and cysteine-dependent aspartate specific protease-3(Caspase-3) of Alexandrium tamarense.Methods] We tested photosynthetic pigments,chlorophyll fluorescence efficiency,antioxidant systems and caspase-3 activity in the algae cells treated with 0.5%,1.0%,1.5% and 2.0% BS03 cell-free filtrate after 12,24,36 and 48 h.Results](1) The chlorophyll-a and chlorophyll fluorescence efficiency Fv/Fm decreased with the increase of BS03 cell-free filtrate and treatment time.Carotenoids contents of A.tamarense cells treated with low BS03(0.5% and 1.0%) cell-free filtrate were higher than the control.(2) Antioxident enzyme activities varied as treatment time and concentration.Malodialdehyde(MDA) contents increased significantly with BS03 cell-free filtrate treatment.(3) Caspase-3 protease activities of algal cells increased by BS03 cell-free filtrate.Conclusion] BS03 inhibited the photosynthesis whereas enhanced the lipid peroxidation of the cellular membrane of Alexandrium tamarense,indicating its algicidal activity.
%K Alexandrium tamarense
%K algicidal bacteria
%K photosynthetic pigment
%K antioxidant defense system<br>塔玛亚历山大藻
%K 溶藻细菌
%K 光合色素
%K 抗氧化保护酶系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A3C6BA55AB623B90FA9104CFFC826F3C&aid=6872F7A14063ADE5066CE1B97B26DD70&yid=99E9153A83D4CB11&vid=286FB2D22CF8D013&iid=B31275AF3241DB2D&sid=141C24EC1980F602&eid=C8C16F05E379B334&journal_id=0001-6209&journal_name=微生物学报&referenced_num=0&reference_num=0