Round table

Wednesday, May 15, 2019 - 12:00pm

Ying Sun

Stanford University

Comparative analysis of ABA-dependent gene regulatory networks across the Brassicaceae reveal innovations in the regulation of stress-associated pathways

Halophytes are stress tolerant plants that live along ocean shorelines or near hypersaline lakes. Currently, the gene regulatory networks that underlie a halophyte’s adaptation to stress is still unknown. My approach focuses on comparing diploid species within the Brassicaceae family including Arabidopsis thaliana, Sisymbrium irio, Capsella rubella which are glycophytes (salt-sensitive), and Schrenkiella parvula, and Eutrema salsugineum which are halophytes (salt-tolerant). Using RNA-Seq and DAP-Seq, I identified transcriptional signatures associated with plant sensitivity to stress mediated by the plant stress hormone abscisic acid (ABA). My data suggest a transcriptional rewiring of ABA-mediated gene-regulatory networks in the halophytes that may contribute to their enhanced tolerance to environmental stress