Journalartikel
Autorenliste: Krippner, J; Schubert, S
Jahr der Veröffentlichung: 2021
Seiten: 439-447
Zeitschrift: Journal of Plant Nutrition and Soil Science
Bandnummer: 184
Heftnummer: 4
ISSN: 1436-8730
eISSN: 1522-2624
Open Access Status: Hybrid
DOI Link: https://doi.org/10.1002/jpln.202000537
Verlag: Wiley-VCH Verlag
Abstract:
Background Plants evolved various mechanisms to cope with metal stress. Cadmium (Cd) exposure specifically induces the synthesis of thiol-rich substances such as phytochelatins. Due to the chemical similarity of Cd and zinc (Zn), similar detoxification mechanisms for both metals are under discussion.Aim We conducted a nutrient solution experiment to investigate thiol accumulation of parsley (Petroselinum crispum) and spinach (Spinacia oleracea) cultivars at different metal toxicity levels in vivo.Methods Three metal treatments were applied: 1 mu M Zn (control), 10 mu M Zn, and 1 mu M Zn + 1 mu M Cd. After 10 days, thiol accumulation in parsley and spinach cultivars, which differ in their Zn tissue tolerance, was measured.Results Spinach and parsley cultivars differed in metal uptake, translocation, and resistance. In spinach, Cd application induced more severe toxicity symptoms and biomass reduction than Zn. Cadmium toxicity was more pronounced in spinach than in parsley due to higher Cd translocation of spinach cultivars. Despite comparable Zn tissue concentrations, parsley did not show any Zn toxicity symptoms. Due to lower Cd tissue concentrations, only a slight browning of parsley roots was found after Cd treatment. Whereas Cd application induced thiol synthesis in both plant species, Zn excess did not.Conclusion As elevated Zn concentrations in plant tissues did not induce thiol synthesis, a contribution of phytochelatins to Zn homeostasis and detoxification was excluded.
Zitierstile
Harvard-Zitierstil: Krippner, J. and Schubert, S. (2021) Elevated zinc concentrations did not induce thiols in spinach (Spinacia oleracea) and parsley (Petroselinum crispum), Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde, 184(4), pp. 439-447. https://doi.org/10.1002/jpln.202000537
APA-Zitierstil: Krippner, J., & Schubert, S. (2021). Elevated zinc concentrations did not induce thiols in spinach (Spinacia oleracea) and parsley (Petroselinum crispum). Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde. 184(4), 439-447. https://doi.org/10.1002/jpln.202000537