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Updated: May 8, 2026

Expression, Solubilization, and Purification of Eukaryotic Borate Transporters
Published on: March 7, 2019
Transcription factors as potential participants in the signal transduction pathway of boron deficiency
Agustín González-Fontes1, Jesús Rexach1, Carlos Quiles-Pando1
11Departamento de Fisiología, Anatomía, y Biología Celular; Facultad de Ciencias Experimentales; Universidad Pablo de Olavide; Sevilla, Spain.
Abstract:
Boron (B) plays a well-known structural role in the cell wall, however the way of perceiving B deficiency by roots and transmitting this environmental signal to the nucleus to elicit a response is not well established. It is known that the direct interaction between Ca2+ sensors and transcription factors (TFs) is a necessary step to regulate the expression of downstream target genes in some signaling pathways. Interestingly, B deprivation affected gene expressions of several TFs belonging to MYB, WRKY, and bZIP families, as well as expressions of Ca2+ -related genes such as several CML (calmodulin-like protein) and CPK (Ca2+ -dependent protein kinase) genes. Taken together, these results suggest that B deficiency could affect the expression of downstream target genes by alteration of a calcium signaling pathway in which the interaction between CMLs and/or CPKs with TFs (activator or repressor) would be a crucial step, which would explain why some genes are upregulated whereas others are repressed upon B deprivation.
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