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Interference between arsenic-induced toxicity and hypoxia

Titelangaben

Kumar, Vijay ; Vogelsang, Lara ; Seidel, Thorsten ; Schmidt, Romy ; Weber, Michael ; Reichelt, Michael ; Meyer, Andreas ; Clemens, Stephan ; Sharma, Shanti ; Dietz, Karl-Josef:
Interference between arsenic-induced toxicity and hypoxia.
In: Plant, Cell & Environment. Bd. 42 (2019) Heft 2 . - S. 574-590.
ISSN 1365-3040
DOI: https://doi.org/10.1111/pce.13441

Abstract

Plants often face combinatorial stresses in their natural environment. Here, arsenic (As) toxicity was combined with hypoxia (Hpx) in the roots of Arabidopsis thaliana as it often occurs in nature. Arsenic inhibited growth of both roots and leaves, whereas root growth almost entirely ceased in Hpx. Growth efficiently resumed, and Hpx marker transcripts decreased upon reaeration. Compromised recovery from HpxAs treatment following reaeration indicated some persistent effects of combined stresses despite lower As accumulation. Root glutathione redox potential turned more oxidized in Hpx and most strongly in HpxAs. The more oxidizing root cell redox potential and the lowered glutathione amounts may be conducive to the growth arrest of plants exposed to HpxAs. The stresses elicited changes in elemental and transcriptomic composition. Thus, calcium, magnesium, and phosphorous amounts decreased in rosettes, but the strongest decline was seen for potassium. The reorganized potassium-related transcriptome supports the conclusion that disturbed potassium homeostasis contributes to the growth phenotype. In a converse manner, photosynthesis-related parameters were hardly affected, whereas accumulated carbohydrates under all stresses and anthocyanins under Hpx exclude carbohydrate limitation. The study demonstrates the existence of both synergistic since mutually aggravating effects and antagonistic effects of single and combined stresses.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER148159
Keywords: arsenic toxicity; cis-OPDA; ferredoxin; glutathione; hormones; hypoxia; redox sensors; redox signalling; stress combination; transcriptome
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Lehrstuhl Pflanzenphysiologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Lehrstuhl Pflanzenphysiologie > Lehrstuhl Pflanzenphysiologie - Univ.-Prof. Dr. Stephan Clemens
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
500 Naturwissenschaften und Mathematik > 580 Pflanzen (Botanik)
Eingestellt am: 02 Apr 2019 06:52
Letzte Änderung: 25 Sep 2019 10:06
URI: https://eref.uni-bayreuth.de/id/eprint/48199