Iron in seeds - Loading pathways and subcellular localization
Journal
Frontiers in Plant Science
Journal Volume
4
Journal Volume
4
Journal Issue
JAN
Journal Issue
JAN
Start Page
535
ISSN
1664462X
Date Issued
2014-01-02
Author(s)
Abstract
Iron (Fe) is one of the most abundant elements on earth, but its limited bioavailability poses a major constraint for agriculture and constitutes a serious problem in human health. Due to an improved understanding of the mechanisms that control Fe homeostasis in plants, major advances toward engineering biofortified crops have been made during the past decade. Examples of successful biofortification strategies are, however, still scarce and the process of Fe loading into seeds is far from being well understood in most crop species. In particular in grains where the embryo represents the main storage compartment such as legumes, increasing the seed Fe content remains a challenging task. This review aims at placing the recently identified actors in Fe transport into the unsolved puzzle of grain filling, taking the differences of Fe distribution between various species into consideration. We summarize the current knowledge on Fe transport between symplasmic and apoplasmic compartments, and provide models for Fe trafficking and localization in different seed types that may help to develop high seed Fe germplasms.
Subjects
Biofortification
Fe in seeds
Fe storage
Fe transport
Grain filling
SDGs
Publisher
Frontiers Research Foundation
Type
review article