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The Fe nutritional demands, requirements and mechanisms of uptake by Dunaliella bardawil as well as potential Fe sources were
studied. A comparison between Fe uptake from bacterial siderophores and from synthetic ferric chelates revealed algal growth
response and chlorophyll synthesis to increasing concentrations and availability at a range of 0.01 μM–5 μM, as well as differences
in efficiency. Furthermore, chloroplast ultrastructure, as observed by TEM, was affected by Fe deficiency, as was chlorophyll
content. Ferric reduction is involved in the Fe uptake mechanism of Fe-stressed D. bardawil. Nutrient solution with controlled
levels of free Fe2+ as well as spectrophotometric assays were used to measure Fe3+ reduction. This study shows that D. bardawil utilizes Fe3+ via a reduction mechanism, similar to that of strategy-I higher plants.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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