scholarly journals Under phosphate starvation conditions, Fe and Al trigger accumulation of the transcription factor STOP1 in the nucleus of Arabidopsis root cells

2019 ◽  
Vol 99 (5) ◽  
pp. 937-949 ◽  
Author(s):  
Christian Godon ◽  
Caroline Mercier ◽  
Xiaoyue Wang ◽  
Pascale David ◽  
Pierre Richaud ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Phosphate Starvation ◽  
Root Cells ◽  
Arabidopsis Root ◽  
Starvation Conditions

scholarly journals Evolution of Reduced Co-Activator Dependence Led to Target Expansion of a Starvation Response Pathway

2017 ◽  
Author(s):  
Bin Z. He ◽  
Xu Zhou ◽  
Erin K. O’Shea
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Physiological Response ◽  
Phosphate Starvation ◽  
Closely Related Species ◽  
Starvation Response ◽  
Evolutionary Mechanism ◽  
Functional Roles ◽  
Phosphate Response ◽  
Starvation Conditions

AbstractIn S. cerevisiae, the phosphate starvation (PHO) responsive transcription factors Pho4 and Pho2 are jointly required for induction of phosphate response genes and survival in phosphate starvation conditions. In the related human commensal and pathogen C. glabrata, Pho4 is required but Pho2 is dispensable for survival in phosphate-limited conditions and is only partially required for inducing the phosphate response genes. This reduced dependence on Pho2 evolved in C. glabrata and closely related species. Pho4 orthologs that are less dependent on Pho2 induce more genes when introduced into the S. cerevisiae background, and Pho4 in C. glabrata both binds to more sites and induces more genes with expanded functional roles compared to Pho4 in S. cerevisiae. Our work reveals an evolutionary mechanism for rapidly expanding the targets of a transcription factor by changing its dependence on a co-activator, potentially refining the physiological response it regulates.

scholarly journals Co-ordination and divergence of cell-specific transcription and translation of genes in arabidopsis root cells

2014 ◽  
Vol 114 (6) ◽  
pp. 1109-1123 ◽  
Author(s):  
Dhivyaa Rajasundaram ◽  
Joachim Selbig ◽  
Staffan Persson ◽  
Sebastian Klie
Keyword(s):  
Root Cells ◽  
Arabidopsis Root

scholarly journals FIT, a regulatory hub for iron deficiency and stress signaling in roots, and FIT-dependent and -independent gene signatures

2020 ◽  
Vol 71 (5) ◽  
pp. 1694-1705 ◽  
Author(s):  
Birte Schwarz ◽  
Petra Bauer
Keyword(s):  
Transcription Factor ◽  
Protein Interactions ◽  
Fe Deficiency ◽  
Bhlh Transcription Factor ◽  
Root Cells ◽  
Gene Signatures ◽  
Helix Loop Helix ◽  
Independent Gene ◽  
Fe Uptake ◽  
Fe Acquisition

Abstract Iron (Fe) is vital for plant growth. Plants balance the beneficial and toxic effects of this micronutrient, and tightly control Fe uptake and allocation. Here, we review the role of the basic helix–loop–helix (bHLH) transcription factor FIT (FER-LIKE FE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR) in Fe acquisition. FIT is not only essential, it is also a central regulatory hub in root cells to steer and adjust the rate of Fe uptake by the root in a changing environment. FIT regulates a subset of root Fe deficiency (–Fe) response genes. Based on a combination of co-expression network and FIT-dependent transcriptome analyses, we defined a set of FIT-dependent and FIT-independent gene expression signatures and co-expression clusters that encode specific functions in Fe regulation and Fe homeostasis. These gene signatures serve as markers to integrate novel regulatory factors and signals into the –Fe response cascade. FIT forms a complex with bHLH subgroup Ib transcription factors. Furthermore, it interacts with key regulators from different signaling pathways that either activate or inhibit FIT function to adjust Fe acquisition to growth and environmental constraints. Co-expression clusters and FIT protein interactions suggest a connection of –Fe with ABA responses and root cell elongation processes that can be explored in future studies.

scholarly journals Analyses of Ca2+ Accumulation and Dynamics in the Endoplasmic Reticulum of Arabidopsis Root Cells Using a Genetically Encoded Cameleon Sensor

2013 ◽  
Vol 163 (3) ◽  
pp. 1230-1241 ◽  
Author(s):  
Maria Cristina Bonza ◽  
Giovanna Loro ◽  
Smrutisanjita Behera ◽  
Andrea Wong ◽  
Jörg Kudla ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Root Cells ◽  
Arabidopsis Root

Characterization of the GRAS transcription factor SCARECROW-LIKE 28’s role in Arabidopsis root growth

2017 ◽  
Vol 60 (5) ◽  
pp. 462-471 ◽  
Author(s):  
Jeong-eun Choe ◽  
Bohye Kim ◽  
Eun Kyung Yoon ◽  
Sejeong Jang ◽  
Gyuree Kim ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Root Growth ◽  
Arabidopsis Root ◽  
Gras Transcription Factor

scholarly journals A Shoot-Specific Hypoxic Response of Arabidopsis Sheds Light on the Role of the Phosphate-Responsive Transcription Factor PHOSPHATE STARVATION RESPONSE1

2014 ◽  
Vol 165 (2) ◽  
pp. 774-790 ◽  
Author(s):  
Maria Klecker ◽  
Philipp Gasch ◽  
Helga Peisker ◽  
Peter Dörmann ◽  
Hagen Schlicke ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Phosphate Starvation ◽  
Hypoxic Response
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