外源过氧化氢对蓝藻UV-B屏蔽物质的影响  

Effect of exogenous H_2O_2 on UV-B shielding material of Cyanobacteria

作　　者：薛林贵[1] 李琳[1] 赵燕[1] 张红光[1] 王鑫[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,甘肃兰州730070

出　　处：《中兽医医药杂志》2013年第3期5-10,共6页Journal of Traditional Chinese Veterinary Medicine

基　　金：国家自然科学基金项目(No:31260135;30870384);教育部长江学者和创新团队发展计划项目(No:IRT0966)

摘　　要：以青海湖粘球藻(Gloeocapsa)作为研究材料,通过生物化学和对比分析的方法,研究外源过氧化氢(H2O2)(0.5 mmol/L)对长期增强UV-B(2.4 W/m2)胁迫下蓝藻UV-B屏障物质的影响。结果显示,外源过氧化氢对藻体内的UV-B屏蔽物质叶绿素a、类胡萝卜素、伪枝藻素、藻胆蛋白以及MAAs等的合成和积累产生负效应,进一步加剧了UV-B对藻体的损害,同时也表明H2O2能够作为信号分子在蓝藻对逆境胁迫的适应过程中发挥作用。Through Biochemistry methods and comparative analysis,Goeocapsa from Qinghai Lake was investigated to study the effect of exogenous hydrogen peroxide（H 2 O 2,0.5 mmol/L）on shielding coloring matter of Cyanobacteria exposed to enhanced UV-B stress（2.4 W/m 2）.The results showed that H 2 O 2 present negative effect on the synthesis and accumulation of chlorophyll a,carotinoid,scytonemin,phycobfliproreins and mycosporine-like amino acids（MAAs）.H 2 O 2 could aggravate the damage on algae under UV-B stress.It indicated that as a signal molecule,H 2 O 2 might play a role in the process of algae to adapt to adversity stress.

关 键 词：粘球藻 UV-B胁迫 过氧化氢 屏蔽物质 

分 类 号：Q948[生物学—植物学]