Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.plantsci.2023.111919
Lizenz creative commons licence
Titel (primär) Phytosiderophore pathway response in barley exposed to iron, zinc or copper starvation
Autor Aleksza, D.; Spiridon, A.; Tarkka, M.; Hauser, M.-T.; Hann, S.; Causon, T.; Kratena, N.; Stanetty, C.; George, T.S.; Russell, J.; Oburger, E.
Quelle Plant Science
Erscheinungsjahr 2024
Department BOOEK; iDiv
Band/Volume 339
Seite von art. 111919
Sprache englisch
Topic T5 Future Landscapes
Keywords Root exudation; Barley; Biofortification; Iron; Zinc; Copper deficiency; Mugineic acid; Phytosiderophore
Abstract Efficient micronutrient acquisition is a critical factor in selecting micronutrient dense crops for human consumption. Enhanced exudation and re-uptake of metal chelators, so-called phytosiderophores, by roots of graminaceous plants has been implicated in efficient micronutrient acquisition. We compared PS biosynthesis and exudation as a response mechanism to either Fe, Zn or Cu starvation. Two barley (Hordeum vulgare L.) lines with contrasting micronutrient grain yields were grown hydroponically and PS exudation (LC-MS) and root gene expression (RNAseq) were determined after either Fe, Zn, or Cu starvation. The response strength of the PS pathway was micronutrient dependent and decreased in the order Fe > Zn > Cu deficiency. We observed a stronger expression of PS pathway genes and greater PS exudation in the barley line with large micronutrient grain yield suggesting that a highly expressed PS pathway might be an important trait involved in high micronutrient accumulation. In addition to several metal specific transporters, we also found that the expression of IRO2 and bHLH156 transcription factors was not only induced under Fe but also under Zn and Cu deficiency. Our study delivers important insights into the role of the PS pathway in the acquisition of different micronutrients.
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Aleksza, D., Spiridon, A., Tarkka, M., Hauser, M.-T., Hann, S., Causon, T., Kratena, N., Stanetty, C., George, T.S., Russell, J., Oburger, E. (2024):
Phytosiderophore pathway response in barley exposed to iron, zinc or copper starvation
Plant Sci. 339 , art. 111919 10.1016/j.plantsci.2023.111919