The effect of varied zinc (Zn) and iron (Fe) supply on the release of Zn and Fe mobilizing phytosiderophores from roots was studied in Zn-efficient Aroona and Zn-inefficient Durati wheat genotypes (Triticum aestivum cv. Aroona; T. durum cv. Durati) grown under controlled environmental conditions in nutrient solution for 25 days. Phytosiderophore release was determined by the measurement of Zn and Fe mobilizing capacity of root exudates from a Zn-loaded resin and from freshly precipitated Fe III hydroxide as well as identification by HPLC analysis.Visual Zn-deficiency symptoms, such as necrotic patches on leaves and reduction in shoot length, appeared first and more severely in Zn-inefficient Durati, although the concentrations of total Zn in shoot and root tissues were the same in both genotypes. Zinc-efficient Aroona responded to Zn deficiency by increasing phytosiderophore release usually after 10 days growth in nutrient solution, whereas the phytosiderophore release in Durati remained at a very low level during 25 days growth. In contrast, under Fe deficiency and also under both
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.