Variations in effects of ectosymbiotic microbes on the growth rates among different species and genotypes of Daphnia fed different algal diets

Zhang Xuan; Ohtsuki Hajime; Makino Wataru; Kato Yasuhiko; Watanabe Hajime; Urabe Jotaro

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Variations in effects of ectosymbiotic microbes on the growth rates among different species and genotypes of Daphnia fed different algal diets

机译：异位微生物微生物对Daphnia喂养不同藻类饮食的不同物种和基因型生长率的变化

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Several recent studies have shown that ectosymbiotic bacterial microbiota, including gut microbes, affect the growth and reproduction of Daphnia, a key organism in lake ecosystems. However, these studies examined specific species, such as the model organism, Daphnia magna, and used green algae as food. It is unclear if symbiotic bacteria affect fitness in other Daphnia species common in lakes and ponds in Japan. In this study, we examined the growth rates of sterilized individuals of two Daphnia pulex genotypes with D. magna using the green algae Scenedesmus and the diatom Cyclotella as algal diets. In addition, we examined the growth rate of the sterilized D. pulex individuals infected by Limnohabitans spp., previously reported to promote the fitness of D. magna as ectosymbiotic bacteria. We found that the effects of ectosymbiotic bacteria on growth rate differed not only between different genotypes of D. pulex but also between individuals fed the different algal diets. The results suggest that the genotype- and diet-specific differences in fitness-dependency on the ectosymbiotic microbiota can be factors affecting the genetic structures of D. pulex populations.

机译：最近的几项研究表明，异源性细菌微生物群，包括肠道微生物，影响湖泊生态系统的关键生物体的生长和繁殖。然而，这些研究检查了特定的物种，例如模型生物，Daphnia Magna和使用的绿藻作为食物。尚不清楚共生细菌是否影响日本湖泊和池塘中常见的其他Daphnia物种的健身。在这项研究中，我们研究了使用绿藻刺肌和硅藻菌和硅藻酸纤维菌作为藻类饮食的D.Magna的两种Daphnia Pulx基因型的生长率。此外，我们检查了由Limnohitans SPP感染的灭菌D.浆浆体的生长速率。先前据报道，以促进D.MANGA作为异位菌细菌的适应性。我们发现异位对抗细菌对生长速率的影响不仅不同于D.脉冲珠的不同基因型之间的差异不同。喂养不同藻类饮食的个体之间。结果表明，对非辛生物微生物生物依赖性的基因型和饮食特异性差异可以是影响D.脉冲群遗传结构的因素。

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来源
《Ecological research》 |2021年第2期|303-312|共10页
作者
Zhang Xuan; Ohtsuki Hajime; Makino Wataru; Kato Yasuhiko; Watanabe Hajime; Urabe Jotaro;
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作者单位

Tohoku Univ Grad Sch Life Sci Aquat Ecol Lab Aoba Ku 6-3 Aoba Sendai Miyagi 9808578 Japan;

Tohoku Univ Grad Sch Life Sci Aquat Ecol Lab Aoba Ku 6-3 Aoba Sendai Miyagi 9808578 Japan;

Tohoku Univ Grad Sch Life Sci Aquat Ecol Lab Aoba Ku 6-3 Aoba Sendai Miyagi 9808578 Japan;

Osaka Univ Grad Sch Engn Dept Biotechnol Suita Osaka Japan;

Osaka Univ Grad Sch Engn Dept Biotechnol Suita Osaka Japan;

Tohoku Univ Grad Sch Life Sci Aquat Ecol Lab Aoba Ku 6-3 Aoba Sendai Miyagi 9808578 Japan;

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正文语种 eng
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关键词
Daphnia; diatoms; green algae; Limnohabitans; symbiotic bacteria;

机译：Daphnia;硅藻;绿藻;Limnohabitans;共生细菌;

Variations in effects of ectosymbiotic microbes on the growth rates among different species and genotypes of Daphnia fed different algal diets

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