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Due to its ability to accept and donate electrons, iron (Fe) is an indispensable component of electron transport chains and a cofactor in many vital enzymes. Except for waterlogged conditions, under which the lack of oxygen prevents oxidation and precipitation of iron as Fe3+ hydroxides, the availability of iron in soils is generally far below the plant's demand for optimal growth. Plants have evolved...
Trees inhabiting central Amazon floodplain forests are subjected to an annual flood-pulse lasting up to 10months, leading to both oxygen shortage and accumulation of high levels of reduced iron. To understand the mechanisms underlying the adaptation to these conditions, cuttings from three tree species typical of vrzea inundation forests (Salix martiana, Tabernaemontana juruana, and Laetia corymbulosa),...
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