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Evolutionary flexibility in flooding response circuitry in angiosperms

https://doi.org/10.1126/science.aax8862

Reynoso, Mauricio A.; Kajala, Kaisa; Bajic, Marko; West, Donnelly A.; Pauluzzi, Germain; Yao, Andrew I.; Hatch, Kathryn; Zumstein, Kristina; Woodhouse, Margaret; Rodriguez-Medina, Joel; et al (September 2019, Science)

Flooding due to extreme weather threatens crops and ecosystems. To understand variation in gene regulatory networks activated by submergence, we conducted a high-resolution analysis of chromatin accessibility and gene expression at three scales of transcript control in four angiosperms, ranging from a dryland-adapted wild species to a wetland crop. The data define a cohort of conserved submergence-activated genes with signatures of overlapping cis regulation by four transcription factor families. Syntenic genes are more highly expressed than nonsyntenic genes, yet both can have the cis motifs and chromatin accessibility associated with submergence up-regulation. Whereas the flexible circuitry spans the eudicot-monocot divide, the frequency of specific cis motifs, extent of chromatin accessibility, and degree of submergence activation are more prevalent in the wetland crop and may have adaptive importance.
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Innovation, conservation, and repurposing of gene function in root cell type development

https://doi.org/10.1016/j.cell.2021.04.024

Kajala, Kaisa; Gouran, Mona; Shaar-Moshe, Lidor; Mason, G. Alex; Rodriguez-Medina, Joel; Kawa, Dorota; Pauluzzi, Germain; Reynoso, Mauricio; Canto-Pastor, Alex; Manzano, Concepcion; et al (June 2021, Cell)
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Translational regulation contributes to the elevated CO ₂ response in two Solanum species

https://doi.org/10.1111/tpj.14632

Gray, Sharon B.; Rodriguez‐Medina, Joel; Rusoff, Samuel; Toal, Ted W.; Kajala, Kaisa; Runcie, Daniel E.; Brady, Siobhan M. (January 2020, The Plant Journal)

Summary Understanding the impact of elevated CO₂(eCO₂) in global agriculture is important given climate change projections. Breeding climate‐resilient crops depends on genetic variation within naturally varying populations. The effect of genetic variation in response to eCO₂is poorly understood, especially in crop species. We describe the different ways in whichSolanum lycopersicumand its wild relativeS. pennelliirespond to eCO₂, from cell anatomy, to the transcriptome, and metabolome. We further validate the importance of translational regulation as a potential mechanism for plants to adaptively respond to rising levels of atmospheric CO₂.
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