Macro and Micronutrient Storage in Plants and Their Remobilization When Facing Scarcity: The Case of Drought

Philippe Etienne, Sylvain Diquelou, Marion Prudent, Christophe Salon, Anne Maillard and Alain Ourry
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Philippe Etienne: Université de Caen Normandie, UMR 950 Ecophysiologie Végétale, Agronomie et Nutritions N, C, S, Esplanade de la Paix, CS 14032, 14032 Caen CEDEX 5, France
Sylvain Diquelou: Université de Caen Normandie, UMR 950 Ecophysiologie Végétale, Agronomie et Nutritions N, C, S, Esplanade de la Paix, CS 14032, 14032 Caen CEDEX 5, France
Marion Prudent: Agroécologie, AgroSup Dijon, INRA, Université de Bourgogne Franche-Comté, 17 Rue Sully, BP 86510, 21065 Dijon CEDEX, France
Christophe Salon: Agroécologie, AgroSup Dijon, INRA, Université de Bourgogne Franche-Comté, 17 Rue Sully, BP 86510, 21065 Dijon CEDEX, France
Anne Maillard: Centre Mondial d’Innovation, CMI, Groupe Roullier, 18 Avenue Franklin Roosevelt, 35400 Saint-Malo, France
Alain Ourry: Université de Caen Normandie, UMR 950 Ecophysiologie Végétale, Agronomie et Nutritions N, C, S, Esplanade de la Paix, CS 14032, 14032 Caen CEDEX 5, France

Agriculture, 2018, vol. 8, issue 1, 1-17

Abstract: Human mineral malnutrition or hidden hunger is considered a global challenge, affecting a large proportion of the world’s population. The reduction in the mineral content of edible plant products is frequently found in cultivars bred for higher yields, and is probably increased by intensive agricultural practices. The filling of grain with macro and micronutrients is partly the result of a direct allocation from root uptake and remobilization from vegetative tissues. The aim of this bibliographic review is to focus on recent knowledge obtained from ionomic analysis of plant tissues in order to build a global appraisal of the potential remobilization of all macro and micronutrients, and especially those from leaves. Nitrogen is always remobilized from leaves of all plant species, although with different efficiencies, while nutrients such as K, S, P, Mg, Cu, Mo, Fe and Zn can be mobilized to a certain extent when plants are facing deficiencies. On the opposite, there is few evidence for leaf mobilization of Ca, Mn, Ni and B. Mechanisms related to the remobilization process (remobilization of mineral forms from vacuolar and organic compounds associated with senescence, respectively) are also discussed in the context of drought, an abiotic stress that is thought to increase and known to modulate the ionic composition of grain in crops.

Keywords: grain filling; nutrient remobilization; senescence; abiotic stress (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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