Transcriptomes and Epigenomes in Specific Plant Developmental Processes

Jigang Li
Yale University

This talk will introduce briefly the main genomic work conducted in recent years at Dr Xing-Wang Deng’s lab, Yale University. Our lab has been involved in studying the mechanisms of plant photomorphogenesis in the last two decades. Light is one of the key environmental signals that influences plant growth and development. Plants can monitor almost all facets of light by several classes of photoreceptors, including phytochromes and cryptochromes. We performed ChIP-chip and ChIP-seq analyses to identify the in vivo binding sites of ELONGATED HYPOCOTYL5 (HY5) and FAR-RED ELONGATED HYPOCOTYL3 (FHY3), two key transcription factors in regulating plant photomorphogenesis, in the Arabidopsis genome. Our studies provided important new insight into their functions and identified unexpected new roles in plant development. Heterosis is another plant developmental process that we are interested in. The behavior of transcriptomes and epigenomes in hybrids of heterotic parents is of fundamental interest. We generated highly integrated maps of the epigenome, mRNA, and small RNA transcriptomes of maize and rice parental lines and their reciprocal hybrids. Our data revealed a comprehensive overview of transcriptional and epigenetic trends in heterotic maize and rice crosses.

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