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Interference between arsenic-induced toxicity and hypoxia

Title data

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. Vol. 42 (2019) Issue 2 . - pp. 574-590.
ISSN 1365-3040
DOI: https://doi.org/10.1111/pce.13441

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER148159
Keywords: arsenic toxicity; cis-OPDA; ferredoxin; glutathione; hormones; hypoxia; redox sensors; redox signalling; stress combination; transcriptome
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology > Chair Plant Physiology - Univ.-Prof. Dr. Stephan Clemens
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 02 Apr 2019 06:52
Last Modified: 25 Sep 2019 10:06
URI: https://eref.uni-bayreuth.de/id/eprint/48199