Universität zu Köln

Naranjo-Arcos, Maria Augusta, Maurer, Felix, Meiser, Johannes, Pateyron, Stephanie, Fink-Straube, Claudia and Bauer, Petra (2017). Dissection of iron signaling and iron accumulation by overexpression of subgroup Ib bHLH039 protein. Sci Rep, 7. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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Abstract

Iron is an essential growth determinant for plants, and plants acquire this micronutrient in amounts they need in their environment. Plants can increase iron uptake in response to a regulatory transcription factor cascade. Arabidopsis thaliana serves as model plant to identify and characterize iron regulation genes. Here, we show that overexpression of subgroup Ib bHLH transcription factor bHLH039 (39Ox) caused constitutive iron acquisition responses, which resulted in enhanced iron contents in leaves and seeds. Transcriptome analysis demonstrated that 39Ox plants displayed simultaneously gene expression patterns characteristic of iron deficiency and iron stress signaling. Thereby, we could dissect iron deficiency response regulation. The transcription factor FIT, which is required to regulate iron uptake, was essential for the 39Ox phenotype. We provide evidence that subgroup Ib transcription factors are involved in FIT transcriptional regulation. Our findings pose interesting questions to the feedback control of iron homeostasis.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Naranjo-Arcos, Maria Augusta UNSPECIFIED UNSPECIFIED UNSPECIFIED Maurer, Felix UNSPECIFIED UNSPECIFIED UNSPECIFIED Meiser, Johannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Pateyron, Stephanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink-Straube, Claudia UNSPECIFIED UNSPECIFIED UNSPECIFIED Bauer, Petra UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-217969
DOI:	10.1038/s41598-017-11171-7
Journal or Publication Title:	Sci Rep
Volume:	7
Date:	2017
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSCRIPTION FACTOR FIT; FERRIC-CHELATE REDUCTASE; ARABIDOPSIS-THALIANA; DEFICIENCY RESPONSES; PLANTS; ACQUISITION; HOMEOSTASIS; ROOTS; GENES; TRANSPORTER Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21796