Abstract
It is still an open question whether the zinc deficiency-induced release of phytosiderophores (PS, phytometallophores) significantly contributes to zinc nutrition of graminaceous plant species. The present studies were attempted to compare the production and release of phytosiderophores by roots of aestivum and durum wheat under Fe and Zn deficiency, since durum wheat showed lower Zn efficiency in field studies relative to aestivum wheat. It was found that phytosiderophore release by roots is induced under Zn deficiency and that durum wheat released significantly lower amounts of PS than aestivum wheat under Zn stress while under Fe stress the difference in release of PS for the two wheat types was much smaller. The amount of PS released by roots under Fe or Zn stress was related to its contents in the roots before the onset of PS release, which starts 2 h after the onset of light and continues for the next 4 h. Both aestivum and durum wheat follow similar diurnal rhythm for PS release and its level in roots. These results suggest that the capacity for PS production and release is a limiting factor for Zn efficiency in graminaceous species.
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© 2002 B. G. Teubner GmbH, Stuttgart/Leipzig/Wiesbaden
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Singh, B., Erenoğlu, B., Neumann, G., Römheld, V., von Wirén, N. (2002). Role of Phytosiderophores in Zinc Efficiency of Wheat. In: Merbach, W., Hütsch, B.W., Wittenmayer, L., Augustin, J. (eds) Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen. Vieweg+Teubner Verlag. https://doi.org/10.1007/978-3-322-91216-9_7
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DOI: https://doi.org/10.1007/978-3-322-91216-9_7
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