Abstract
Mango (Mangifera indica L.) trees are extremely sensitive to Fe-deficiency. Severe Fe-deficiencies are common in mango groves located on sandy low-carbonate soils on which other species do not exhibit Fe-deficiency. An earlier study has shown that low levels of soil-Fe contribute to the appearance of Fe-deficiency symptoms. However, other factors seem to be involved in inducing Fe-deficiency in mango since symptoms of deficiency are common on soils containing sufficient soil-Fe. It was hypothesized that strategy I mechanisms in mango exhibit low activity levels as compared with other dicots.
The release of protons and reductants, rate of Fe3+ reduction by membrane reductases and 59Fe uptake were measured in nutrient solutions on three mango rootstocks known to differ in susceptibility to Fe-deficiency.
Differences among rootstocks were not related to the levels of activity of strategy I mechanisms. In general, the rootstocks that were examined exhibited moderate acidification ability and extremely low levels of reduction and of 59Fe3+ uptake from 59FeEDDHA. The susceptibility of mango to Fedeficiency may be explained based on these measurements. It seems that susceptibility of various mango rootstocks to Fe-stress cannot be predicted based on the efficiency of strategy I mechanisms.
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Shenker, M., Chen, Y., Gazit, S. (1991). Iron deficiency in mango trees. In: Chen, Y., Hadar, Y. (eds) Iron Nutrition and Interactions in Plants. Developments in Plant and Soil Sciences, vol 43. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3294-7_41
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DOI: https://doi.org/10.1007/978-94-011-3294-7_41
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