par Verbruggen, Nathalie ;Hermans, Christian
Référence Plant and soil, 368, 1-2, page (87-99)
Publication Publié, 2013
Article révisé par les pairs
Résumé : BackgroundMagnesium (Mg) is pivotal for many biochemical and physiological processes in plants. Mg biological functions include a key role in photosynthesis, in protein synthesis, as well as in nucleotide metabolism. However, Mg nutrition of plants remains little examined compared with other essential elements.ScopeThe review summarizes the current knowledge on physiological targets of Mg imbalances. Recently generated transcriptome profiles in response to Mg shortage and excess are also presented.ConclusionsSugar accumulation in source leaves is a major consequence of Mg shortage that can limit plant growth most probably by down regulation of photosynthesis activity. Newly identified molecular targets of Mg imbalance are appraised in relation to their potential contribution to Mg deficiency phenotypic emergence. In particular a potential role of the circadian clock and change in phytohormones concentration and/or signalling in the orchestration of the Mg deficiency response is possible. The development of markers for incipient Mg deficiency appears to be a challenging task