The competition characteristic of diatom &lt;i&gt;Nitzschia palea&lt;/i&gt; and water blooms and the growth inhibition effect of LED Irradiation on cyanobacteria &lt;i&gt;Microcystis aeruginosa&lt;/i&gt;

Watanabe, Shunsuke; Podiapen, Tannen Naythen; ITOSE, Ryouta; Iseri, Yasushi; Hao, Aimin; Kondo, Takahiro

doi:10.2208/jscejer.75.7_iii_97

Cited by 2 publications

(11 citation statements)

References 22 publications

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“…The specific growth rate of M. aeruginosa under fluorescent light (0.33 day −1 ) was similar to that reported by Ohkubo et al (1991) obtained from the same strain cultivated under similar conditions (0.32 day −1 ). However, the growth rate obtained using blue light in this study (0.11 day −1 ) was different from that reported in a previous study (0.00 day −1 ) (Watanabe et al, 2019). This difference may be attributed to light intensity because the intensity used in the previous study was 20 μmol photons m −2 s −1 .…”

Section: Discussioncontrasting

confidence: 99%

Blue light irradiation increases the relative abundance of the diatom Nitzschia palea in co‐culture with cyanobacterium Microcystis aeruginosa

Watanabe

Matsunami

Okuma

et al. 2022

Water Environment Research

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Lake eutrophication is associated with cyanobacterial blooms. The pennate diatom Nitzschia palea (N. palea) inhibits the growth of the cyanobacterium Microcystis aeruginosa (M. aeruginosa); therefore, increasing the relative abundance of N. palea may contribute to the inhibition of Microcystis blooms. Several studies have demonstrated that blue light irradiation promotes diatom growth and inhibits cyanobacterial growth. In this study, we evaluated the effects of blue light irradiation on N. palea and M. aeruginosa abundance. Monocultures and co-cultures of N. palea and M. aeruginosa were exposed to blue light and fluorescent light at 32 μmol photons m À2 s À1 . The relative abundance of N. palea under fluorescent light decreased gradually, whereas the abundance under blue light was relatively higher (approximately 74% and 98% under fluorescent light and blue light, respectively, at the end of the experiment). The inhibition efficiency of blue light on the growth rate of M. aeruginosa was related to the light intensity. The optimal light intensity was considered 20 μmol photons m À2 s À1 based on the inhibition efficiency of 100%. Blue light irradiation can be used to increase the abundance of N. palea to control Microcystis blooms. Practitioner Points • The effects of blue light irradiation on N. palea abundance was discussed.• Monocultures and co-cultures of N. palea and M. aeruginosa were exposed to blue light and to fluorescent light.• The relative abundance of N. palea increased upon irradiation with blue light in co-culture with M. aeruginosa.

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Section: Discussioncontrasting

confidence: 99%

Blue light irradiation increases the relative abundance of the diatom Nitzschia palea in co‐culture with cyanobacterium Microcystis aeruginosa

Watanabe

Matsunami

Okuma

et al. 2022

Water Environment Research

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“…Figure 2 indicates that the increase in the speci c growth rate for N. palea in a light intensity was higher in uorescent light than in blue light. The results showed that N. palea grew under blue light while M. aeruginosa did not, which was the same as the previous study for all conditions (Watanabe et al 2019). Diatoms have a fucoxanthin which is a natural pigment (Wang et al 2018).…”

Section: Discussionsupporting

confidence: 90%

“…The speci c growth rate for N. palea under uorescent light (0.62 day − 1 ) was higher than that under blue light (0.36 day − 1 ). It was previously reported that the speci c growth rate under blue light (0.23 day − 1 ) was higher than under uorescent light, which was 0.21 day − 1 (Watanabe et al 2019). The difference of the speci c growth rate under each light condition between the previous and current study is likely due to the difference in light intensity.…”

Section: Discussionsupporting

confidence: 38%

“…Amano and Machida (2013) reported that the co-culture with the three species at PO 4 -P = 0.5 mgL − 1 led to the predominance of M. aeruginosa, while Scenedesmus quadricauda completely dominated at PO 4 -P = 0.1 mgL − 1 . Benthic diatom Nitzschia palea had better growth performance than M. aeruginosa in high nitrogen concentration medium, while N. palea did not to exert inhibition effects in lake water which had less nutrients than the growth medium (Watanabe et al 2019). Thus, algal species competing with M. aeruginosa do not always inhibit the growth of M. aeruginosa.…”

Section: Introductionmentioning

confidence: 91%

“…Tan et al (2020) reported that the growth rate of M. aeruginosa decreased by about 24% by changing the light colour from uorescent light to blue light. Watanabe et al (2019) reported that the growth rate under uorescent light and blue light was 0.27 day − 1 and 0.00 day − 1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

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The Inhibition Efficiency of Blue Light And Light Intensity On The Growth Rate of Microcystis Aeruginosa

Watanabe

Matsunami

Ookuma

et al. 2021

Preprint

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Lake eutrophication is associated with the occurrence of cyanobacterial blooms which have a negative effect on other organisms. Several studies demonstrated that blue LED irradiation inhibits the growth rate of cyanobacteria Microcystis aeruginosa, while the efficiency varies from study to study. In this paper, the focus was on the effects of light intensity on the growth of M. aeruginosa because the light intensity used in the precious studies varied from 12 to 45 μmol photons m-2 s-1. Growth experiment of M. aeruginosa was conducted with 32 μmol photons m-2 s-1 blue light and fluorescent light, and the results were compared with the findings of previous reports. Furthermore, co-culture of M. aeruginosa and diatom Nitzschia palea was also prepared. The growth rate of M. aeruginosa was 0.33 day-1 and 0.11 day-1 under fluorescent light and blue light, respectively. The blue light dropped the growth rate by 67%. Compared with previous studies, the inhibition efficiency seemed to be the best at 20 μmol photons m-2 s-1. The growth rate of N. palea was 0.62 day-1 and 0.36 day-1 under fluorescent light and blue light, respectively. Since the efficiency of N. palea by blue light (42%) was smaller than that of M. aeruginosa, blue light is considered to be a countermeasure to cyanobacterial blooms.

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The competition characteristic of diatom <i>Nitzschia palea</i> and water blooms and the growth inhibition effect of LED Irradiation on cyanobacteria <i>Microcystis aeruginosa</i>

Cited by 2 publications

References 22 publications

Blue light irradiation increases the relative abundance of the diatom Nitzschia palea in co‐culture with cyanobacterium Microcystis aeruginosa

Blue light irradiation increases the relative abundance of the diatom Nitzschia palea in co‐culture with cyanobacterium Microcystis aeruginosa

The Inhibition Efficiency of Blue Light And Light Intensity On The Growth Rate of Microcystis Aeruginosa

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