Rhizobacterial volatiles and photosynthesis-related signals coordinate MYB72 expression in Arabidopsis roots during onset of induced systemic resistance and iron-deficiency responses. Zamioudis, C., Korteland, J., Van Pelt, J. A., van Hamersveld, M., Dombrowski, N., Bai, Y., Hanson, J., Van Verk, M. C., Ling, H. Q., Schulze-Lefert, P., & Pieterse, C. M. Plant J, 84(2):309–22, October, 2015. Edition: 2015/08/27
Rhizobacterial volatiles and photosynthesis-related signals coordinate MYB72 expression in Arabidopsis roots during onset of induced systemic resistance and iron-deficiency responses [link]Paper  doi  abstract   bibtex   
In Arabidopsis roots, the transcription factor MYB72 plays a dual role in the onset of rhizobacteria-induced systemic resistance (ISR) and plant survival under conditions of limited iron availability. Previously, it was shown that MYB72 coordinates the expression of a gene module that promotes synthesis and excretion of iron-mobilizing phenolic compounds in the rhizosphere, a process that is involved in both iron acquisition and ISR signaling. Here, we show that volatile organic compounds (VOCs) from ISR-inducing Pseudomonas bacteria are important elicitors of MYB72. In response to VOC treatment, MYB72 is co-expressed with the iron uptake-related genes FERRIC REDUCTION OXIDASE 2 (FRO2) and IRON-REGULATED TRANSPORTER 1 (IRT1) in a manner that is dependent on FER-LIKE IRON DEFICIENCY TRANSCRIPTION FACTOR (FIT), indicating that MYB72 is an intrinsic part of the plant's iron-acquisition response that is typically activated upon iron starvation. However, VOC-induced MYB72 expression is activated independently of iron availability in the root vicinity. Moreover, rhizobacterial VOC-mediated induction of MYB72 requires photosynthesis-related signals, while iron deficiency in the rhizosphere activates MYB72 in the absence of shoot-derived signals. Together, these results show that the ISR- and iron acquisition-related transcription factor MYB72 in Arabidopsis roots is activated by rhizobacterial volatiles and photosynthesis-related signals, and enhances the iron-acquisition capacity of roots independently of the iron availability in the rhizosphere. This work highlights the role of MYB72 in plant processes by which root microbiota simultaneously stimulate systemic immunity and activate the iron-uptake machinery in their host plants.
@article{zamioudis_rhizobacterial_2015,
	title = {Rhizobacterial volatiles and photosynthesis-related signals coordinate {MYB72} expression in {Arabidopsis} roots during onset of induced systemic resistance and iron-deficiency responses},
	volume = {84},
	issn = {1365-313X (Electronic) 0960-7412 (Linking)},
	shorttitle = {Rhizobacterial volatiles and photosynthesis‐related signals coordinate},
	url = {https://www.ncbi.nlm.nih.gov/pubmed/26307542},
	doi = {10/f3m6j7},
	abstract = {In Arabidopsis roots, the transcription factor MYB72 plays a dual role in the onset of rhizobacteria-induced systemic resistance (ISR) and plant survival under conditions of limited iron availability. Previously, it was shown that MYB72 coordinates the expression of a gene module that promotes synthesis and excretion of iron-mobilizing phenolic compounds in the rhizosphere, a process that is involved in both iron acquisition and ISR signaling. Here, we show that volatile organic compounds (VOCs) from ISR-inducing Pseudomonas bacteria are important elicitors of MYB72. In response to VOC treatment, MYB72 is co-expressed with the iron uptake-related genes FERRIC REDUCTION OXIDASE 2 (FRO2) and IRON-REGULATED TRANSPORTER 1 (IRT1) in a manner that is dependent on FER-LIKE IRON DEFICIENCY TRANSCRIPTION FACTOR (FIT), indicating that MYB72 is an intrinsic part of the plant's iron-acquisition response that is typically activated upon iron starvation. However, VOC-induced MYB72 expression is activated independently of iron availability in the root vicinity. Moreover, rhizobacterial VOC-mediated induction of MYB72 requires photosynthesis-related signals, while iron deficiency in the rhizosphere activates MYB72 in the absence of shoot-derived signals. Together, these results show that the ISR- and iron acquisition-related transcription factor MYB72 in Arabidopsis roots is activated by rhizobacterial volatiles and photosynthesis-related signals, and enhances the iron-acquisition capacity of roots independently of the iron availability in the rhizosphere. This work highlights the role of MYB72 in plant processes by which root microbiota simultaneously stimulate systemic immunity and activate the iron-uptake machinery in their host plants.},
	language = {en},
	number = {2},
	urldate = {2021-06-07},
	journal = {Plant J},
	author = {Zamioudis, C. and Korteland, J. and Van Pelt, J. A. and van Hamersveld, M. and Dombrowski, N. and Bai, Y. and Hanson, J. and Van Verk, M. C. and Ling, H. Q. and Schulze-Lefert, P. and Pieterse, C. M.},
	month = oct,
	year = {2015},
	note = {Edition: 2015/08/27},
	keywords = {Arabidopsis Proteins/genetics/*metabolism, Arabidopsis thaliana, Arabidopsis/drug effects/*metabolism, Gene Expression Regulation, Plant/drug effects/genetics, Iron/*deficiency, MYB transcription factor, Photosynthesis/drug effects, Plant Roots/drug effects/*metabolism, Rhizobium/*chemistry, Volatile Organic Compounds/*pharmacology, induced resistance, iron homeostasis, plant growth-promoting rhizobacteria, volatile organic compounds},
	pages = {309--22},
}
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