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On July 2, 2021, the international academic journal Communications Biology published an online study titled "Potential evidence for transgenerational epigenetic memory in Arabidopsis thaliana following spaceflight" by Cai Weiming's research group, Photosynthesis and Environmental Biology Laboratory, Center for Excellence in Molecular Plant Science, Chinese Academy of Sciences Thesis
.
This is a follow-up study carried out on the basis of the earlier use of the "Shishi No.
The "Shishi No.
10" returnable scientific experiment satellite is China's first microgravity scientific experiment satellite.
It was launched by the Long March 2D carrier rocket at the Jiuquan Satellite Launch Center
.
"Shijian 10" completed 19 microgravity science and space life science experiments in space, and is the scientific satellite that has carried out the most scientific experiment projects at a time
As a constant vector existing on the earth, gravity is very important for the growth of plants
.
The microgravity environment is a unique scene for studying the effects of gravity
We performed whole-genome methylation analysis and transcriptome analysis on the contemporary and F1 generations, and the results showed that although the genomic DNA methylation level of the F1 generation did not have a significant difference similar to that observed in its parent plants, it was also detected Some residual imprints of DNA methylation differences indicate that some DNA methylation differences caused by space flight can be inherited to offspring; through the combined analysis of DNA methylation differences and gene expression differences and the enrichment analysis of GO and KEGG, We found that the 81 genes that changed in the F1 generation were concentrated in aspects such as the ABA signaling pathway, protein phosphorylation and nitrate signaling pathway
.
In the F1 generation, we can still observe phenotypic differences in plant root length and early flowering caused by space flight.
Associate researcher Xu Peipei and Assistant Researcher Chen Haiying (resigned) of the Photosynthesis and Environmental Biology Laboratory are the co-first authors, researcher Cai Weiming is the corresponding author, and doctoral student Hu Jinbo participated in the work
.
The research was funded by the National Natural Science Foundation of China and the Chinese Academy of Sciences
Link to the paper: https:// on the Effect of Space Flight Microgravity on Plant DNA Methylation and Its Passage
