ARTÍCULO

Mg deficiency affects leaf Mg remobilization and the proteome in Brassica napus.

Autores: Billard , V.; Maillard, A.; Coquete, L.; Jouenne, T.; Cruz, F.; García-Mina Freire, José María; Yvin, J. C.; Ourry, A.; Etienne, P.
Título de la revista: PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN: 0981-9428
Volumen: 107
Páginas: 337 - 343
Fecha de publicación: 2016
Resumen:
In order to cope with variable mineral nutrient availability, higher plants have developed numerous strategies including the remobilization of nutrients from source to sink tissues. However, such processes remain relatively unknown for magnesium (Mg), which is the third most important cation in plant tissues. Using Mg depletion of Brassica napus, we have demonstrated that Mg is remobilized from old leaves to young shoot tissues. Moreover, this study showed that Mg depletion induces modification of nutrient uptake, especially Zn and Mn. Finally, comparative proteomic analysis of old leaves (source of Mg) revealed amongst other results that some proteins requiring Mg for their functionality (isocitrate dehydrogenase for example) were up-regulated. Moreover, down-regulation of proteases suggested that mobilization of Mg from old leaves was not associated with senescence.