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群体和单细胞微囊藻对短期高光胁迫的生理响应
THE PHYSIOLOGICAL RESPONSE OF COLONIAL AND SINGLE-CELLED FORM OF MICROCYSTIS TO SHORT-TERM HIGH STRESS

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徐沙 1   杨燕君 1   许金铸 1   施军琼 1   宋立荣 2   吴忠兴 1 *  
文摘 为了探讨不同形态的微囊藻(Microcystis)对光的耐受能力及其应对机制,研究比较了短期高光强条件下群体微囊藻和单细胞微囊藻的生理响应,结果表明,在高光强胁迫下,群体和单细胞微囊藻的叶绿素含量、最大电子传递速率(ETR_(max))均降低,但与单细胞微囊藻相比,群体微囊藻的下降幅度较小;在高光强胁迫下,群体微囊藻的过氧化氢酶(CAT)与超氧化物歧化酶(SOD)的活性均显著增加,而单细胞微囊藻只有CAT活性增加;在短期高光胁迫下,群体微囊藻的死亡率没有显著变化。这些结果表明群体微囊藻比单细胞微囊藻能耐受更高的光强,也暗示了群体微囊藻在野外高光强条件下更具竞争优势。
其他语种文摘 Light is one of the important factors for algae growth and product by photosynthesis. This study investigated the physiological response of colonial and single-celled form of Microcystis to light intensity. The results showed that the Chl. a and ETR_(max) in colonial and single-celled forms of Microcystis were declined by high light intensity with a bigger decrease in single-celled form of Microcystis. The enzyme activities of SOD and CAT in colonial and singlecelled form of Microcystis were increased by high light intensity. The colonial form of Microcystis decreased the photooxidate damage by increasing SOD and CAT activities, while single-celled Microcystis reduced damage through CAT activity only. The mortality rate of colonial form of Microcystis showed no significantly difference by short-term high light intensity. These suggest that colonial form of Microcystis had higher tolerance to high light intensity when compared with single-celled form of Microcystis, explaining that colonial Microcystis are predominate strains in water blooms.
来源 水生生物学报 ,2017,41(2):443-447 【核心库】
DOI 10.7541/2017.55
关键词 群体和单细胞微囊藻 ; 光强 ; 生理响应 ; 蓝藻水华
地址

1. 西南大学, 三峡库区生态环境教育部重点实验室;;重庆市三峡库区植物生态与资源重点实验室, 重庆, 400715  

2. 中国科学院水生生物研究所, 武汉, 430072

语种 中文
文献类型 研究性论文
ISSN 1000-3207
学科 植物学
基金 西南大学博士基金 ;  国家自然科学基金
文献收藏号 CSCD:5933269

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引证文献 6

1 施军琼 棕鞭藻及其培养滤液对铜绿微囊藻生长及生理特性的影响 水生生物学报,2019,43(1):213-218
被引 1

2 陈何舟 微囊藻聚集与迁移机制的研究进展 环境科学与技术,2019,42(1):142-149
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