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Population growth and plastid type of Myrionecta rubra depend on the kinds of available cryptomonad prey

机译：桃金娘桃的种群增长和质体类型取决于可用的隐藻猎物的种类

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摘要

Myrionecta rubra, a cosmopolitan red tide ciliate, is not only a predator on cryptomonads but also is a main prey known so far for survival of harmful algae Dinophysis species. This common mixotrophic ciliate functionally seems to have plastid preference, but this possibility has been rarely studied using genetic analysis combined with growth rates of M. rubra. We investigated dynamics of plastids of starved M. rubra (strain MR-MAL01) with the addition of cryptomonads having different types of plastids as prey. Population growth of '2-month starved' M. rubra strain MR-MAL01 was 0.09 ± 0.014 d~(-1) when supplied with cryptomonad prey strain CR-MAL03, in sharp contrast to the growth rate of the predator strain MR-MAL01, 0.48 ± 0.059 d~(-1) with prey strain CR-MAL01. Within 30 min after the addition of cryptomonad prey strain CR-MAL03 to a '3-week starved' M. rubra population, both the "CR-MAL03 type' 1192-bp PCR product and the 'CR-MAL01 type' 802-bp PCR product from diagnostic primers, which are specific to plastid 16S rRNA gene, were amplified from the ciliates. Only the 802-bp PCR product was detected in the ciliates supplied only with prey strain CR-MAL01. Both kinds of PCR product from M. rubra were continuously detected for 2 weeks after being washed free of prey in the treatment supplied with cryptomonad prey strain CR-MAL03. The M. rubra strain MR-MAL01 thus can ingest both prey strains, CR-MAL01 and CR-MAL03, and can retain plastids of strain CR-MAL03 for an extended period of time. The differential phototrophic growth of M. rubra after the inoculation of the two different cryptomonad prey species implies that M. rubra sometimes can retain plastids with which it is not normally found in a symbiotic relationship, in spite of a resultant lower growth rate.
机译：大红潮纤毛虫，Myrionecta rubra，不仅是隐孢子虫的捕食者，还是迄今为止已知的主要有害藻类Dinophysis物种生存的主要猎物。这种常见的混养纤毛虫在功能上似乎具有质体偏好，但是很少使用遗传分析结合红毛杨的生长速度研究这种可能性。我们通过添加具有不同类型的质体作为食物的隐孢子虫，研究了饥饿的毛红孢菌（菌株MR-MAL01）的质体动力学。与隐性捕食菌株MR-MAL01的生长速度形成鲜明对比时，提供“隐孢子虫”捕食菌株CR-MAL03时“饥饿2个月”的杨梅菌株MR-MAL01的种群增长为0.09±0.014 d〜（-1）。猎物菌株CR-MAL01为0.48±0.059 d〜（-1）。在将“隐性单胞菌”猎物菌株CR-MAL03添加到“饥饿3周”的红孢杆菌种群后30分钟内，“ CR-MAL03类型” 1192bp PCR产物和“ CR-MAL01类型” 802bp从纤毛虫中扩增出对质体16S rRNA基因特异的诊断引物的PCR产物，仅在CR-MAL01猎物菌株提供的纤毛虫中仅检测到802 bp的PCR产物。在用隐孢子虫捕食菌株CR-MAL03提供的处理中，将其冲洗干净后连续2周检测到风疹，因此，风疹分支杆菌MR-MAL01可以同时捕食CR-MAL01和CR-MAL03这两个捕食菌株，并且可以接种两种不同的隐孢子虫猎物后，红曲霉的光养生长不同，这表明红曲霉有时可以保留通常不存在的质体。共生关系，尽管结果增长率。

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  • 来源
    《Harmful Algae》 |2011年第5期|p.536-541|共6页
  • 作者

    Geumog Myung; Hyung S. Kim; Jong Soo Park; Myung Gil Park; Wonho Yih;

  • 作者单位

    BK21 Saemankeum Marine Environment Research Team, Kunsan National University, San 68, Miryong-dong, Gunsan 573-701, Republic of Korea;

    Research Institute of Fisheries Technology, Jeonbuk, 15 Soryongchogyo 2gil, Gunsan 573-882, Republic of Korea;

    School of Life Science, Kyungpook National University. Daegu 702-701, Republic of Korea;

    Laboratory ofHAB Ecophysiology (LOHABE), Department of Oceanography, Chonnam National University, Gwangju 500-757, Republic of Korea;

    Department of Oceanography, Kunsan National University, San 68, Miryong-dong, Gunsan 573-701, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cryptomonads; growth rate; myrionecta rubra; plastid; prey;

    机译：隐孢子虫;增长率;桃金娘质体猎物;

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