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The basic helix-loop-helix transcription factor, bHLH11 functions in the iron-uptake system in Arabidopsis thaliana.

التفاصيل البيبلوغرافية
العنوان: The basic helix-loop-helix transcription factor, bHLH11 functions in the iron-uptake system in Arabidopsis thaliana.
المؤلفون: Tanabe N; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan., Noshi M; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan., Mori D; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan., Nozawa K; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan., Tamoi M; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan., Shigeoka S; Department of Advanced Bioscience, Faculty of Agriculture, Kindai University, Nakamachi, Nara, 631-8505, Japan. shigeoka@nara.kindai.ac.jp.
المصدر: Journal of plant research [J Plant Res] 2019 Jan; Vol. 132 (1), pp. 93-105. Date of Electronic Publication: 2018 Nov 11.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Springer-Verlag Tokyo Country of Publication: Japan NLM ID: 9887853 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1618-0860 (Electronic) Linking ISSN: 09189440 NLM ISO Abbreviation: J Plant Res Subsets: MEDLINE
أسماء مطبوعة: Publication: 2002- : Tokyo ; New York : Springer-Verlag Tokyo
Original Publication: Tokyo : Botanical Society of Japan, c1993-
مواضيع طبية MeSH: Arabidopsis/*genetics , Arabidopsis Proteins/*physiology , Basic Helix-Loop-Helix Transcription Factors/*physiology , Gene Expression Regulation, Plant/*genetics , Homeostasis/*genetics , Iron/*metabolism, Arabidopsis/metabolism ; Arabidopsis Proteins/genetics ; Basic Helix-Loop-Helix Transcription Factors/genetics ; Biological Transport ; Gene Expression Profiling ; Plants, Genetically Modified/genetics ; Plants, Genetically Modified/metabolism
مستخلص: Iron (Fe) is a micronutrient that is essential for plant development and growth. Basic helix-loop-helix (bHLH) transcription factors are a superfamily of transcription factors that are important regulatory components in transcriptional networks in plants. bHLH transcription factors have been divided into subclasses based on their amino acid sequences and domain structures. Among the members of clade IVb (PYE, bHLH121, and bHLH11), the functions of bHLH11 remain unclear. In the present study, we characterized bHLH11 as a negative regulator of Fe homeostasis. bHLH11 expression levels were high in the roots and up-regulated after plants were transferred to Fe sufficient conditions. Although T-DNA knockout mutants of bHLH11 were lethal, dominant negative (DN-) and overexpression (OX-) of bHLH11 plants exhibited sensitivity to Fe deficiency. Furthermore, the expression of FIT, a master regulator of Fe deficiency responses, was suppressed in the transgenic plants. These results suggest that the transcriptional repressor bHLH11 functions as a negative regulator of FIT-dependent Fe uptake and modulates Fe levels in Arabidopsis plants. Salicylic acid (SA) modulates the expression of genes involved in Fe-deficient responses. We found that SA levels were elevated in DN- and OX-bHLH11 plants. The T-DNA insertion mutant sid2-1, which was defective for the production of SA, did not exhibit sensitivity to Fe deficiency; however, the crossed plants of OX-bHLH11 and sid2-1 relieved sensitivity to the Fe deficiency observed in OX-bHLH11 plants. These results suggest that the accumulation of SA is closely related to iron homeostasis.
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فهرسة مساهمة: Keywords: Arabidopsis thaliana; Basic helix-loop-helix transcription factor; FIT; Fe metabolism; Salicylic acid
المشرفين على المادة: 0 (Arabidopsis Proteins)
0 (Basic Helix-Loop-Helix Transcription Factors)
0 (bHLH11 protein, Arabidopsis)
E1UOL152H7 (Iron)
تواريخ الأحداث: Date Created: 20181113 Date Completed: 20190226 Latest Revision: 20200225
رمز التحديث: 20231215
DOI: 10.1007/s10265-018-1068-z
PMID: 30417276
قاعدة البيانات: MEDLINE
الوصف
تدمد:1618-0860
DOI:10.1007/s10265-018-1068-z