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首页> 外文期刊>Mycoscience >Zoospore production and motility of mangrove thraustochytrids from Hong Kong under various salinities
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Zoospore production and motility of mangrove thraustochytrids from Hong Kong under various salinities

机译：不同盐度下香港红树林破囊壶菌的游动孢子产生和运动

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摘要

We investigated the effects of salinity on the zoospore production of four mangrove thraustochytrid isolates, Schizochytrium sp. KF1, Aurantiochytrium mangrovei KF6, Thraustochytrium striatum KF9 and Ulkenia sp. KF13. The zoospore motilities, which were based on curvilinear velocity (VCL) and straight-line velocity (VSL), were monitored using the Computer-Assisted Sperm Motility Analysis (CASA) Software system. The zoospore production of four isolates was suppressed at salinity above 15‰. Schizochytrium sp. produced the greatest number of zoospores at 15‰, while Aurantiochytrium mangrovei and Ulkenia sp. produced abundant zoospores in diluted sea water ranging from 7.5 to 15‰. Thraustochytrium striatum performed relatively poorly under all salinities. Salinity and exposure time, as well as their interactions, had significant impacts on most zoospore velocity measurements. The optimal velocities of zoospore motility also varied among isolates. Zoospores of Schizochytrium sp. and A. mangrovei had similar responses to salinity, with the highest motility at 7.3‰, followed by a decrease in velocities with increasing salinity. In contrast, the zoospore of T. striatum had optimal motility at 12‰ and remained highly motile from 15 to 20‰. The velocities of zoospores of Ulkenia sp. were the lowest among the tested thraustochytrids and had optimal motility at 12‰. Zoospores of all the isolates remained active after 4 h of exposure to aqueous medium, but the optimal salinity for each mode of swimming changed. The ecological significance of these data are discussed.
机译：我们调查了盐分对四种红树林破囊壶菌分离物Schizochytrium sp游动孢子产生的影响。 KF1，红毛金龟KF6，破囊壶菌纹状体KF9和Ulkenia sp。 KF13。使用计算机辅助精子动力分析（CASA）软件系统监测基于曲线速度（VCL）和直线速度（VSL）的游动孢子运动。盐度高于15‰时，四种分离物的游动孢子产生受到抑制。裂殖藻产生最大数量的游动孢子，为15‰，而Aurantiochytrium mangrovei和Ulkenia sp。在7.5至15‰的稀释海水中产生丰富的游动孢子。在所有盐度下，破囊壶菌纹状体的表现相对较差。盐度和暴露时间，以及它们之间的相互作用，对大多数游动孢子速度测量都有重要影响。在分离物中，游动孢子运动的最佳速度也不同。裂殖壶菌的游动孢子。红树林和A. mangrovei对盐度的反应相似，最高活力为7.3‰，随后盐度增加，速度降低。相比之下，纹状体的游动孢子在12‰时具有最佳的运动能力，在15至20‰时仍具有很高的运动力。 Ulkenia sp。的游动孢子的速度。在被测试的破囊壶菌中最低，运动性最佳，为12‰。暴露于水性介质4 h后，所有分离物的游动孢子均保持活性，但每种游泳方式的最佳盐度发生了变化。讨论了这些数据的生态意义。

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  • 来源
    《Mycoscience》 |2012年第1期|p.1-9|共9页
  • 作者

    Clement K. M. Tsui; K. W. Fan; Raymond K. K. Chow; E. B. Gareth Jones; Lilian L. P. Vrijmoed;

  • 作者单位

    Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People’s Republic of China;

    Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People’s Republic of China;

    Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People’s Republic of China;

    Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People’s Republic of China;

    Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, The People’s Republic of China;

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  • 关键词

    Aurantiochytrium; Labyrinthulomycetes; Schizochytrium; Stramenopiles; Thraustochytrium; Ulkenia;

    机译：棘金鱼;迷路菌;裂殖壶菌;Stramenopiles;胸膜上游杆菌;Ulkenia;

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