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Coupling langmuir with michaelis-menten-a practical alternative to estimate se content in rice?

Nothstein, A. K.; Eiche, E.; Riemann, M.; Nick, P.; Maier, P.; Tenspolde, A.; Neumann, T.

Selenium plays an important, but vastly neglected role in human nutrition with a narrow gap between dietary deficiency and toxicity. For a potential biofortification of food with Se, as well as for toxicity-risk assessment in sites contaminated by Se, modelling of local and global Se cycling is essential. As bioavailability of Se for rice plants depends on the speciation of Se and the resulting interactions with mineral surfaces as well as the interaction with Se uptake mechanisms in plants, resulting plant Se content is complex to model. Unfortunately, simple experimental models to estimate Se uptake into plants from substrates have been lacking. Therefore, a mass balance of Se transfer between lithosphere (represented by kaolinite), hydrosphere (represented by a controlled nutrient solution), and biosphere (represented by rice plants) has been established. In a controlled, closed, lab-scale system, rice plants were grown hydroponically in nutrient solution supplemented with 0–10000 μgL¯¹ Se of either selenite or selenite. Furthermore, in a series of batch experiments, adsorption and desorption were studied for selenite and selenite in competition with each of the major nutrient oxy-anions, nitrate, sulfate and phosphate. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000095124
Veröffentlicht am 03.06.2019
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Sicherheit und Umwelt (SUM)
Botanisches Institut (BOTANIK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1932-6203
KITopen-ID: 1000095124
Erschienen in PLOS ONE
Band 14
Heft 4
Seiten Art. Nr.: e0214219
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 19.04.2019
Nachgewiesen in Web of Science
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