Abstract
The understanding of seed dormancy, germination and longevity are important goals in plant biology, with relevant applications for agriculture, food industry and also human nutrition. Reactive Oxygen Species (ROS) are key molecules involved in the release of dormancy, when their concentrations fall within the so called ‘oxidative window.’ The mechanisms of ROS distribution and sensing in seeds, from dormant to germinating ones, still need elucidation. Also, the impact of iron (Fe) deficiency on seed dormancy is still unexplored; this is surprising, given the known pro-oxidant role of Fe when in a free form. We provide evidence of a link between plant Fe nutrition and dormancy of progeny seeds by using different Arabidopsis ecotypes and mutants with different dormancy strengths grown in control soil or under severe Fe deficiency. The latter condition extends the dormancy in several genotypes. The focus on the mechanisms involved in the Fe deficiency-dependent alteration of dormancy and longevity promises to be a key issue in seed (redox) biology.
Highlights
Iron Deficiency Prolongs Seed Dormancy in Arabidopsis PlantsReviewed by: Hannetz Roschzttardtz, Pontificia Universidad Católica de Chile, Chile Stephane Mari, Institut National de la Recherche Agronomique, France
The still widespread micronutrient deficiencies in various developing countries, the increase in human population and the shifts in the diets taking place in many countries all urge for an increased production of staple foods of higher nutritional value (Murgia et al, 2012, 2013)
A selective oxidation of targeted mRNAs and proteins acts as positive mechanism for germination (Bazin et al, 2011; El-Maarouf-Bouteau et al, 2013). Such findings confirm what already established since years in both animal and plant cells, i.e., that Reactive Oxygen Species (ROS) are not mere cytotoxic agents causing oxidative stress and damage of macromolecules but, at certain concentrations, they are important signaling molecules involved in the so-called “redox biology” (Schieber and Chandel, 2014; Kumar et al, 2015; Mittler, 2017)
Summary
Reviewed by: Hannetz Roschzttardtz, Pontificia Universidad Católica de Chile, Chile Stephane Mari, Institut National de la Recherche Agronomique, France. The understanding of seed dormancy, germination and longevity are important goals in plant biology, with relevant applications for agriculture, food industry and human nutrition. We provide evidence of a link between plant Fe nutrition and dormancy of progeny seeds by using different Arabidopsis ecotypes and mutants with different dormancy strengths grown in control soil or under severe Fe deficiency. The latter condition extends the dormancy in several genotypes. The focus on the mechanisms involved in the Fe deficiency-dependent alteration of dormancy and longevity promises to be a key issue in seed (redox) biology
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