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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：在各种盐度下，来自香港的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 per mil. Schizochytrium sp. produced the greatest number of zoospores at 15 per mil, while Aurantiochytrium mangrovei and Ulkenia sp. produced abundant zoospores in diluted sea water ranging from 7.5 to 15 per mil. 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 per mil, followed by a decrease in velocities with increasing salinity. In contrast, the zoospore of T. striatum had optimal motility at 12 per mil and remained highly motile from 15 to 20 per mil. The velocities of zoospores of Ulkenia sp. were the lowest among the tested thraustochytrids and had optimal motility at 12 per mil. 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.Digital Object Identifier http://dx.doi.org/10.1007/s10267-011-0127-2
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， Aurantiochytrium mangrovei KF6， Thraustochytrium striatum 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。盐度高于每密耳15时，四种分离物的游动孢子产生受到抑制。 裂殖壶菌 sp。产生最大数量的游动孢子，每密耳15个，而 Aurantiochytrium mangrovei 和 Ulkenia sp。在稀释的海水中产生了丰富的游动孢子，范围为每密耳7.5至15在所有盐度下， Thraustochytrium striatum 的表现都相对较差。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。游动孢子运动的最佳速度在分离株之间也有所不同。 裂殖壶菌 sp的游动孢子。和 A。红树林对盐度的响应相似，最高的活力为每密耳7.3，随后随着盐度的增加速度降低。相反，T的游动孢子。纹状体的最佳运动力为每密耳12头，并保持高度活动力，从每密耳15到20。乌肯尼亚菌的游动孢子速度是测试的破囊壶菌中最低的，具有最佳运动性，为每密耳12密耳。所有分离物的游动孢子在暴露于水性介质4小时后仍保持活性，但每种游泳方式的最佳盐度都发生了变化。讨论了这些数据的生态意义。数字对象标识符http://dx.doi.org/10.1007/s10267-011-0127-2

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