The contribution of Mugineic acids in transport and absorption of Zn in graminaceous plants -Tracer Experiments using PETIS method-

Abstract

Plants absorb Zinc (Zn) from soil and distribute to whole plants. However, the molecular mechanism of Zn translocation is still unknown. We investigated whether phytosiderophores are involved in absorption and translocation of Zn in graminaceous plants using PETIS (Positron Emitting Tracer Imaging System) method.
(i) ⁶²Zn was supplied from Zn-deficient barley roots with deoxymugineic acid (DMA) or without DMA. Higher amount of Zn was absorbed when Zn was supplied with DMA.
(ii) ⁶²Zn was supplied from Zn-deficient rice roots with DMA or without DMA. Lower amount of Zn was absorbed when Zn was supplied with DMA. However, higher amount of Zn was translocated to newest leaf when Zn was supplied with DMA.
(iii) ⁶²Zn was supplied from Zn-deficient rice leaf with DMA or without DMA. Higher amount of Zn was translocated to the sheath or newest leaf when Zn was supplied with DMA.