Effects of the daily light/dark cycle on photosynthetic performance, oxidative stress and illumination-related genes in boring giant clam Tridacna crocea

Liu, Chunsheng; Yang, Xiaoyu; Sun, Yun; Yang, Yi‐Hsin; Wang, Aimin; He, Linwen; Gu, Zhenxin

doi:10.1007/s00227-021-03883-2

Cited by 11 publications

(6 citation statements)

References 63 publications

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“…The concentration of glucose in the clam hemolymph cycles on a diel basis, with maximum daytime levels 3.2-fold higher than the overnight low, aligning with the photosynthetic production of glucose by the symbiont [ 105 ]. Experimental changes in light-dark cycles have been associated with a reduction in photosynthetic performance by the symbiont and changes in the expression of clock genes in the host [ 106 ]. A molecular study showed that a glycerol production gene expressed in both symbiotic and free-living Symbiodinium is not expressed overnight [ 107 ], alluding to the significance of Symbiodinium for controlling the daily metabolic cycle of the host.…”

Section: Interplay Between Host and Symbiont Diel Cyclesmentioning

confidence: 99%

Microbial circadian clocks: host-microbe interplay in diel cycles

Wollmuth

Angert

2023

BMC Microbiol

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Background Circadian rhythms, observed across all domains of life, enable organisms to anticipate and prepare for diel changes in environmental conditions. In bacteria, a circadian clock mechanism has only been characterized in cyanobacteria to date. These clocks regulate cyclical patterns of gene expression and metabolism which contribute to the success of cyanobacteria in their natural environments. The potential impact of self-generated circadian rhythms in other bacterial and microbial populations has motivated extensive research to identify novel circadian clocks. Main text Daily oscillations in microbial community composition and function have been observed in ocean ecosystems and in symbioses. These oscillations are influenced by abiotic factors such as light and the availability of nutrients. In the ocean ecosystems and in some marine symbioses, oscillations are largely controlled by light-dark cycles. In gut systems, the influx of nutrients after host feeding drastically alters the composition and function of the gut microbiota. Conversely, the gut microbiota can influence the host circadian rhythm by a variety of mechanisms including through interacting with the host immune system. The intricate and complex relationship between the microbiota and their host makes it challenging to disentangle host behaviors from bacterial circadian rhythms and clock mechanisms that might govern the daily oscillations observed in these microbial populations. Conclusions While the ability to anticipate the cyclical behaviors of their host would likely be enhanced by a self-sustained circadian rhythm, more evidence and further studies are needed to confirm whether host-associated heterotrophic bacteria possess such systems. In addition, the mechanisms by which heterotrophic bacteria might respond to diel cycles in environmental conditions has yet to be uncovered.

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Section: Interplay Between Host and Symbiont Diel Cyclesmentioning

confidence: 99%

Microbial circadian clocks: host-microbe interplay in diel cycles

Wollmuth

Angert

2023

BMC Microbiol

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“…To examine the expression level of the nutrition metabolism-regulation-related genes in hepatopancreas, four appetite-related genes were detected ( Table S3 ). In detail, RNA extraction and cDNA synthesis were performed as described in a previous study [ 34 ]. qRT-PCR was carried out in an ABI 7300 Real-time Detection System (Applied Biosystems, Foster City, CA, USA) using the SYBR ExScript qRT-PCR Kit (Takara, Dalian, China) with β-actin as an internal reference [ 35 ].…”

Section: Methodsmentioning

confidence: 99%

Dietary Taurine Intake Affects the Growth Performance, Lipid Composition, and Antioxidant Defense of Juvenile Ivory Shell (Babylonia areolata)

Sun

Yang

et al. 2023

Animals

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In this study, an eight-week feeding trial was performed to investigate the effects of different taurine supplementation levels (0.0% as control, 1.0%, 1.5%, 2.0%, 2.5%, and 3.0%) on the growth performance, lipid composition, and antioxidant ability in juvenile ivory shells Babylonia areolata. The results showed that taurine supplementation significantly improved the specific growth rates (SGRs) and survival rates of ivory shell (except the survival rate in the 3.0% taurine diet group) (p < 0.05). The SGRs showed an increasing and then decreasing tendency with increasing dietary taurine supplementation, and the highest value was observed in the 2.0% taurine diet (2.60%/d). The taurine content in the muscle of ivory shells fed taurine-supplemented diets significantly increased when compared to the control group (p < 0.05). The profiles of C22:2n6 in the muscle of ivory shells fed taurine-supplemented diets were significantly higher than in the control group (p < 0.05), and the highest values were observed in the 2.0% taurine supplementation group. The high-density lipoprotein cholesterol (HDL-C) content in the hepatopancreas showed an increasing and then decreasing tendency with increasing dietary taurine supplementation, while the low-density lipoprotein cholesterol (LDL-C) concentration showed a decreasing tendency. Furthermore, the activities of pepsin and lipase in both the intestine and hepatopancreas significantly increased at moderate taurine supplementation levels compared to the control group (p < 0.05). Accordingly, obvious increases in the histological parameters in the intestine of ivory shells fed taurine-supplemented diets were also found. As for the antioxidant ability, the activities of the total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) showed an increasing and then decreasing tendency with increasing dietary taurine supplementation, and the highest values were observed in the 1.0% and 1.0–2.0% taurine supplementation groups, respectively; the malondialdehyde (MDA) contents significantly decreased with increasing dietary taurine supplementation (p < 0.05). The taurine intake affected the expression of four appetite-related genes in the hepatopancreas, in which orexin and NPY showed an increasing and then decreasing tendency, while leptin and cholecyatoklnin decreased with increasing dietary taurine supplementation. In conclusion, moderate taurine supplementation in an artificial diet (about 1.5–2.0%) could improve the growth performance and antioxidant ability and change the lipid composition of juvenile ivory shells.

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“…being more significant than that at 5,000 lx and 10,000 lx. (Liu et al, 2021). Graham and Hutchison (1979) investigated diurnal activity rhythms in three freshwater turtle species (Chrysemys picta, Clemmys guttata, and Sternotherus odoratus) under different light cycles and showed that they became diurnal under long photoperiods (16L:8D) and nocturnal under short photoperiods (8L:16D).…”

Section: Introductionmentioning

confidence: 99%

Transcriptome analysis of purple and green Apostichopus japonicus reared under different breeding environments

Liu,

Xing,

Liu

et al. 2024

Front. Mar. Sci.

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Sea cucumber (Apostichopus japonicus) is one of the cultured species with the highest production value to a single species in China’s marine agricultural industry with high nutritional and medicinal value. Body color influences numerous biological functions in sea cucumbers, and it has become a key trait in selective breeding. It is found that a cultivation environment with strong light intensity leads to a lighter body color of A. japonicus compared to dark conditions. However, little research has been conducted on the molecular mechanisms regulating body color in different breeding environments. In this study, we used Illumina sequencing to examine gene expression patterns in green and purple A. japonicus exposed to different culture conditions. Overall, the genes in the body wall of purple individuals were more affected by the environment. We also identified pathways that were potentially influenced by the breeding environment, such as “Drug metabolism - cytochrome P450”, “Porphyrin and chlorophyll metabolism”, “Phosphatidylinositol signaling system”, “TGF-beta signaling”, and “mTOR signaling”. The aim of this study was to determine the light conditions and breeding environment that are more favorable to the requirements of body color in A. japonicus and apply them to the selection of high-quality breeds. The results obtained will support the breeding of A. japonicus with specific traits and the production of seedlings to promote the development of this maricultural industry.

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Effects of the daily light/dark cycle on photosynthetic performance, oxidative stress and illumination-related genes in boring giant clam Tridacna crocea

Cited by 11 publications

References 63 publications

Microbial circadian clocks: host-microbe interplay in diel cycles

Microbial circadian clocks: host-microbe interplay in diel cycles

Dietary Taurine Intake Affects the Growth Performance, Lipid Composition, and Antioxidant Defense of Juvenile Ivory Shell (Babylonia areolata)

Transcriptome analysis of purple and green Apostichopus japonicus reared under different breeding environments

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