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Characterization of distinct root and shoot responses to low-oxygen stress in Arabidopsis with a focus on primary C- and N-metabolism

Title data

Mustroph, Angelika ; Barding, Gregory A. ; Kaiser, Kayla A. ; Larive, Cynthia K. ; Bailey-Serres, Julia:
Characterization of distinct root and shoot responses to low-oxygen stress in Arabidopsis with a focus on primary C- and N-metabolism.
In: Plant, Cell & Environment. Vol. 37 (October 2014) Issue 10 . - pp. 2366-2380.
ISSN 1365-3040
DOI: https://doi.org/10.1111/pce.12282

Official URL: Volltext

Project information

Project financing: Stifterverband für die deutsche Wissenschaft

Abstract in another language

Oxygen deficiency, caused by flooding of all or a portion of a plant, leads to significant gene regulatory and metabolic responses associated with survival. When oxygen-deprived in light, aerial organs and root systems respond in distinct manners because of their respective autotrophy and heterotrophy, as well as intrinsic differences in cell biology and organ function. To better understand organ-specific responses to oxygen deficiency, we monitored changes in the metabolome of roots and shoots of Arabidopsis thaliana seedlings using gas chromatography-mass spectrometry and (1) H-nuclear magnetic resonance spectroscopy. Only roots accumulated high amounts of γ-aminobutyrate (GABA) and lactate, whereas both organs accumulated alanine (Ala) upon hypoxia. Meta-analysis of gene regulation data revealed higher induction of mRNAs coding for fermentative enzymes in roots as compared with shoots. However, the elevation in GABA level was not correlated with changes in transcript abundance, supporting the proposal that post-translational mechanisms are important in metabolic acclimation to hypoxia. The biosynthesis, degradation and function of GABA and Ala during oxygen deprivation and re-aeration is discussed. Finally, a systematic survey of low-oxygen mediated regulation of genes associated with primary metabolism across organs and cell types reveals exciting new avenues for future studies.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed-ID: 24450922
BAYCEER120972
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology > Chair Plant Physiology - Univ.-Prof. Dr. Stephan Clemens
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Plant Genetics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Plant Genetics > Professorship Plant Genetics- Univ.Prof. Dr. Angelika Mustroph
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Molecular Biosciences
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Molecular Biosciences - BZMB
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 01 Apr 2015 07:04
Last Modified: 12 May 2015 07:10
URI: https://eref.uni-bayreuth.de/id/eprint/9615