摘要
Development of wheat(Triticum aestivum L.)grain mainly depends on the processes of starch synthesis and storage protein accumulation,which are critical for grain yield and quality.However,the regulatory network underlying the transcriptional and physiological changes of grain development is still not clear.Here,we combined ATAC-seq and RNA-seq to discover the chromatin accessibility and gene expression dynamics during these processes.We found that the chromatin accessibility changes are tightly associated with differential transcriptomic expressions,and the proportion of distal ACRs was increased gradually during grain development.Specific transcription factor(TF)binding sites were enriched at different stages and were diversified among the 3 subgenomes.We further predicted the potential interactions between key TFs and genes related with starch and storage protein biosynthesis and found different copies of some key TFs played diversified roles.Overall,our findings have provided numerous resources and illustrated the regulatory network during wheat grain development,which would shed light on the improvement of wheat yields and qualities.
基金
This project was financially supported by the Outstanding Young Scientist Foundation of NSFC(Overseas)
the Central Public-interest Scientific Institution Basic Research Found(S2022ZD02)
the Fundamental Research Funds from Institute of Crop Sciences,Chinese Academy of Agricultural Sciences(S2020YC07 and S2021YC03)
CAAS Agricultural Science and Technology Innovation Program,China(CAAS-ZDRW202002).
