Molecular Plant Breeding
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Scooped by Grmay H. Lilay
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Phylogenetic analysis of F-bZIP transcription factors indicates conservation of the zinc deficiency response across land plants

Phylogenetic analysis of F-bZIP transcription factors indicates conservation of the zinc deficiency response across land plants | Molecular Plant Breeding | Scoop.it
Basic leucine zipper (bZIP) transcription factors control important developmental and physiological processes in plants. In Arabidopsis thaliana, the three gene F-bZIP subfamily has been associated with zinc deficiency and salt stress response. Benefiting from the present abundance of plant genomic data, we performed an evolutionary and structural characterization of plant F-bZIPs. We observed divergence during seed plant evolution, into two groups and inferred different selective pressures for each. Group 1 contains AtbZIP19 and AtbZIP23 and appears more conserved, whereas Group 2, containing AtbZIP24, is more prone to gene loss and expansion events. Transcriptomic and experimental data reinforced AtbZIP19/23 as pivotal regulators of the zinc deficiency response, mostly via the activation of genes from the ZIP metal transporter family, and revealed that they are the main regulatory switch of AtZIP4. A survey of AtZIP4 orthologs promoters across different plant taxa revealed an enrichment of the Zinc Deficiency Response Element (ZDRE) to which both AtbZIP19/23 bind. Overall, our results indicate that while the AtbZIP24 function in the regulation of the salt stress response may be the result of neo-functionalization, the AtbZIP19/23 function in the regulation of the zinc deficiency response may be conserved in land plants (Embryophytes).
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Rescooped by Grmay H. Lilay from Plant Biology Teaching Resources (Higher Education)
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Five fabulous photobiology reviews from The Plant Cell

Five fabulous photobiology reviews from The Plant Cell | Molecular Plant Breeding | Scoop.it

Five fabulous photobiology reviews from The Plant Cell!

And an overview by Nan Eckardt

www.plantcell.org/content/early/2014/01/29/tpc.114.123026.full.pdf

PIFs: Systems Integrators in Plant Development
Mathematical Models Light Up Plant Signaling
Phototropism: Growing towards an Understanding of Plant Movement
The UV-B Photoreceptor UVR8: From Structure to Physiology
Multiple Layers of Posttranslational Regulation Refine Circadian Clock Activity in Arabidopsis


Via Mary Williams
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