Pei-Zheng Wang's Lab
Featured research (3)
It is well concluded that microbial composition and diversity of coral species can be affected under temperature alterations. However, the interaction of environmental accumulation of corals and temperature stress on symbiotic Symbiodiniaceae and bacterial communities are rarely studied. In this study, two groups of soft coral Sarcophyton trocheliophorum were cultured under constant (26 °C) and inconstant (22 °C to 26 °C) temperature conditions for 30 days as control treatments. After that, water was cooled rapidly to decrease to 20 °C in 24 h. The results of diversity analysis showed that symbiotic Symbiodiniaceae and bacterial communities had a significant difference between the two accumulated groups. The principal coordinate analyses confirmed that symbiotic Symbiodiniaceae and bacterial communities of both control treatments were clustered into two groups. Our results evidenced that rapid cooling stress could not change symbiotic Symbiodiniaceae and bacterial communities’ composition. On the other hand, cooling stress could alter only bacterial communities in constant group. In conclusion, our study represents a clear relationship between environmental accumulation and the impact of short-term cooling stress in which microbial composition structure can be affected by early adaptation conditions.
Coral Symbiodiniaceae and bacteria maintain a symbiotic relationship that is essential for coral survival. The symbiotic communities component in the polyps host could affect coral resistance and the ability to recover from stress. In this study, we increased the cultured range temperature (26 ± 1 ℃) of Sarcophyton trocheliophorum and Euphyllia ancora at 32 ℃ for 12 hours, and then amplified the ITS2 sequence of Symbiodinium and the bacterial 16S rRNA sequence in the sample, respectively to compare Symbiodiniaceae and bacteria diversity and abundance with normal culture temperature. The results showed that there was no change in the dominant species of Symbiodinium in these two corals in the heat treatment group, but the diversity of Symbiodinium in the two corals was significantly different. On the other hand, after thermal treatment, the endophytic bacteria of S. trocheliophorum represented more aerobic bacteria Delfitia, while the E. ancora was infected with more pathogenic endosymbiotic bacteria. This difference observation can be attributed to the different tolerance of corals.