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Full-Text Articles in Life Sciences
Characterization Of The Cytokinin-Responsive Transcriptome In Rice, Tracy Raines, Ivory C. Blakley, Yu-Chang Tsai, Jennifer M. Worthen, José M. Franco-Zorrilla, Roberto Solano, G. Eric Schaller
Characterization Of The Cytokinin-Responsive Transcriptome In Rice, Tracy Raines, Ivory C. Blakley, Yu-Chang Tsai, Jennifer M. Worthen, José M. Franco-Zorrilla, Roberto Solano, G. Eric Schaller
Dartmouth Scholarship
Cytokinin activates transcriptional cascades important for development and the responses to biotic and abiotic stresses. Most of what is known regarding cytokinin-regulated gene expression comes from studies of the dicotyledonous plant Arabidopsis thaliana. To expand the understanding of the cytokinin-regulated transcriptome, we employed RNA-Seq to analyze gene expression in response to cytokinin in roots and shoots of the monocotyledonous plant rice.
Plastid Osmotic Stress Influences Cell Differentiation At The Plant Shoot Apex, Margaret E. Wilson, Matthew Mixdorf, R Howard Berg, Elizabeth S. Haswell
Plastid Osmotic Stress Influences Cell Differentiation At The Plant Shoot Apex, Margaret E. Wilson, Matthew Mixdorf, R Howard Berg, Elizabeth S. Haswell
Biology Faculty Publications & Presentations
The balance between proliferation and differentiation in the plant shoot apical meristem is controlled by regulatory loops involving the phytohormone cytokinin and stem cell identity genes. Concurrently, cellular differentiation in the developing shoot is coordinated with the environmental and developmental status of plastids within those cells. Here, we employ an Arabidopsis thaliana mutant exhibiting constitutive plastid osmotic stress to investigate the molecular and genetic pathways connecting plastid osmotic stress with cell differentiation at the shoot apex. msl2 msl3 mutants exhibit dramatically enlarged and deformed plastids in the shoot apical meristem, and develop a mass of callus tissue at the shoot …
Cytokinin Acts Through The Auxin Influx Carrier Aux1 To Regulate Cell Elongation In The Root, Ian H. Street, Dennis Matthews, Maria Yamburkenko, Ali Sorooshzadeh
Cytokinin Acts Through The Auxin Influx Carrier Aux1 To Regulate Cell Elongation In The Root, Ian H. Street, Dennis Matthews, Maria Yamburkenko, Ali Sorooshzadeh
Dartmouth Scholarship
Hormonal interactions are crucial for plant development. In Arabidopsis, cytokinins inhibit root growth through effects on cell proliferation and cell elongation. Here, we define key mechanistic elements in a regulatory network by which cytokinin inhibits root cell elongation in concert with the hormones auxin and ethylene. The auxin importer AUX1 functions as a positive regulator of cytokinin responses in the root; mutation of AUX1 specifically affects the ability of cytokinin to inhibit cell elongation but not cell proliferation. AUX1 is required for cytokinin-dependent changes of auxin activity in the lateral root cap associated with the control of cell elongation. Cytokinin …