| Kumar, V; Vogelsang, L; Seidel, T; Schmidt, R; Weber, M; Reichelt, M; Meyer, A; Clemens, S; Sharma, S; Dietz, KJ: Interference between arsenic-induced toxicity and hypoxia., Plant Cell and Environment (2018), doi: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. |
Aktuelle Termine
Aktuelle Termine
| BayCEER-Kolloquium: |
|---|
| Do. 25.04.2024 Perspectives and challenges in the restoration and conservation of two isolated habitats: gypsum and cliffs |
| BayCEER Short Courses: |
| Mi. 24.04.2024 Mobile Film Making Workshop (for PhDs/PostDosc/Profs of BayCEER) |
| Fr. 26.04.2024 Mobile Film Making Workshop (for students of BayCEER) |
| Ökologisch-Botanischer Garten: |
| Fr. 19.04.2024 aktuell Führung | Gesteine im Ökologisch-Botanischen Garten |
| So. 21.04.2024 Führung | Den ÖBG kennenlernen: Allgemeine Gartenführung |