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首页> 外文期刊>Harmful Algae >Investigating the production and release of cylindrospermopsin and deoxy-cylindrospermopsin by Cylindrospermopsis raciborskii over a natural growth cycle
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Investigating the production and release of cylindrospermopsin and deoxy-cylindrospermopsin by Cylindrospermopsis raciborskii over a natural growth cycle

机译：在自然生长周期中研究Cylindrospermopsis raciborskii生产和释放cylindrospermopsin和脱氧cylindrospermopsin

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摘要

Many harmful cyanobacterial genera have strains that can produce potent toxins and other biologically active compounds that present a risk to the health of humans and other animals that consume or contact contaminated water. Cylindrospermopsins (CYNs) are produced by several species of cyanobacteria including Cylindrospermopsis raciborskii (Woloszynska) Seenayya and Subba Raju. Previous studies have used filtration methods to separate between the paniculate and dissolved CYNs pools. Filtration may lyse cells and thus overestimate the dissolved CYNs pool. Here we employed a novel passive sampling technique to measure the proportion of dissolved CYNs in two Australian strains of C. raciborskii over the growth cycle while minimizing potential overestimation of the dissolved CYNs pool. We simultaneously compared the ratios of the two major CYNs produced by Australian strains of C. raciborskii: cylindrospermopsin (CYN) and deoxy-CYN in the paniculate and dissolved pools. CYNs stayed within the cells during log phase but accumulated in the water column during stationary and senescent phases. The proportion of deoxy-CYN to CYN differed between strains but increased in both as cells aged. We conclude that while active release or leaking of CYNs from actively growing cells does occur, CYNs in the water column were primarily a result of cell lysis during stationary phase or due to other environmental stressors. The production of CYN and deoxy-CYN were a constitutive process and both the concentration of, ratio between, and release of CYN and deoxy-CYN were strain dependent. Future studies must account for the genetic diversity of CYN producers when investigating the production of CYNs in natural systems.
机译：许多有害的蓝细菌属具有可产生强力毒素和其他生物活性化合物的菌株，这些菌株对食用或接触被污染水的人类和其他动物的健康构成威胁。 Cylindrospermopsins（CYNs）是由几种蓝藻产生的，包括Cylindrospermopsis raciborskii（Woloszynska）Seenayya和Subba Raju。先前的研究已经使用过滤方法来分离颗粒状和溶解性CYNs库。过滤可能会裂解细胞，从而高估了溶解的CYNs库。在这里，我们采用了一种新颖的被动采样技术来测量在整个生长周期中澳大利亚两株雷氏梭菌中溶解的CYNs的比例，同时最大程度地降低了对溶解的CYNs库的潜在高估。我们同时比较了由澳大利亚雷氏梭菌菌株产生的两种主要CYN的比率：圆锥形和溶解池中的cylindrospermopsin（CYN）和脱氧CYN。 CYNs在对数期停留在细胞内，而在静止期和衰老期积聚在水柱中。品系之间，脱氧-CYN与CYN的比例不同，但随着细胞的衰老，两者均增加。我们得出的结论是，尽管确实发生了CYNs从活跃生长的细胞中的主动释放或泄漏，但水柱中的CYNs主要是固定相期间细胞裂解的结果或其他环境应激因素的结果。 CYN和脱氧CYN的生产是一个组成过程，CYN和脱氧CYN的浓度，比例和释放都取决于菌株。在研究自然系统中CYN的产生时，未来的研究必须考虑CYN产生者的遗传多样性。

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  • 来源
    《Harmful Algae》 |2014年第1期|18-25|共8页
  • 作者

    Timothy W. Davis; Philip T. Orr; Gregory L. Boyer; Michele A. Burford;

  • 作者单位

    Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Qld 4111, Australia,Aquatic Ecosystem Management Research Division, Environment Canada, National Water Research Institute, 867 Lakeshore Road, Burlington, ON L7R 4A6, Canada;

    Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Qld 4111, Australia,Seqwater, PO Box 16146, City East, Qld 4002, Australia;

    Chemistry Department, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, United States;

    Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Qld 4111, Australia;

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  • 关键词

    Cylindrospermopsin; Cylindrospermopsis; Deoxy-cylindrospermopsin; Dissolved; Paniculate; Release;

    机译：圆柱精子蛋白酶;圆柱精子;脱氧cylindrospermopsin;溶解;惊慌释放;

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