穗花狐尾藻化感作用对铜绿微囊藻光合效率的影响
Allelopathic Influence of Myriophyllum spicatum on the Photosynthetic Efficiency of Microcystis aeruginosa
查看参考文献29篇
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文摘
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共培养条件下,采用叶绿素含量和叶绿素荧光参数研究穗花狐尾藻分泌的化感物质对铜绿微囊藻光合效率的影响,其中叶绿素荧光参数包括q_N(非化学淬灭)、YⅡ(有效量子效率)、F_v/F_m(最大量子产量)、F'_v/F'_m(光系统Ⅱ有效量子产量)和快速光响应曲线．3 d共培养处理期间,铜绿微囊藻叶绿素含量及叶绿素荧光参数都受到不同程度的影响,不同参数表现出了不同的灵敏性．处理第2 d时,10.0 g/L穗花狐尾藻体系中铜绿微囊藻叶绿素含量抑制率为20.80%,表现出了显著的抑制(P ＜0.05)．而铜绿微囊藻叶绿素荧光参数出现显著降低的时间更早,处理第1 d时,q_N和YⅡ在5.0 g/L穗花狐尾藻的浓度下抑制率分别为15.59%和13.00%,F_v/F_m和F'_v/F'_m在10.0 g/L的浓度下抑制率为15.87%和12.07%,均表现出来明显的受抑制作用(P＜0.05)．处理第3 d时,铜绿微囊藻的快速光响应曲线及根据该曲线计算得到的3个参数都受到了显著的抑制 (P＜0.05)．结果表明,光合作用是穗花狐尾藻抑制铜绿微囊藻生长的重要对象之一,4个叶绿素荧光参数是相对于叶绿素含量更灵敏的指标,其中q_N最灵敏． |
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其他语种文摘
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The allelopathic influence of Myriophyllum spicatum on chlorophyll content and chlorophyll fluorescence parameters of Microcystis aeruginosa was studied in coexistence condition．Chlorophyll fluorescence parameters included qN(non-photochemical quenching),YⅡ(effective quantum yield),F_v/F_m(maximum quantum yield),F'_v/F'_m(effective quantum yield of photosystemⅡ photochemistry)and ETR(electron transport rate)．During the three days under coexistence condition,chlorophyll content and chlorophyll fluorescence parameters of M．aeruginosa were affected by M．spicatum and presented different sensitivities．Chlorophyll content of M．aeruginosa was significantly inhibited by 20.80%on the second day at 10.0 g/L of M．spicatum(P＜0.05)．However, chlorophyll fluorescence parameters of M．aeruginosa decreased earlier and rapider than chlorophyll content．On the first day,q_N and YⅡof M．aeruginosa were significantly inhibited by 15.59%and 13.00%at 5.0 g/L of M．spicatum(P＜0.05),and F_v/F_mandF'_v/F'_m were declined by 15.87%and 12.07%at 10.0 g/L(P＜0.05),respectively．On the third day,ETR and three parameters based on ETR were affected at all levels of M．spicatum(P＜0.05)．The inhibition effects on the photosynthetic activity of M． aeruginosa might be considered as one of the target sites of M．spicatum and chlorophyll fluorescence parameters were more sensitive parameters than chlorophyll content,especially q_N． |
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来源
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环境科学
,2011,32(10):2904-2908 【核心库】
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关键词
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穗花狐尾藻
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铜绿微囊藻
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叶绿素荧光参数
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化感作用
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共培养
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地址
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中国科学院水生生物研究所, 淡水生态与生物技术国家重点实验室, 武汉, 430072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0250-3301 |
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学科
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环境科学基础理论 |
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基金
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中国博士后科学基金
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国家自然科学基金项目
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文献收藏号
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CSCD:4324007
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