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3716941 
Journal Article 
OsNRAMP5 contributes to manganese translocation and distribution in rice shoots 
Yang, M; Zhang, Y; Zhang, L; Hu, J; Zhang, X; Lu, K; Dong, H; Wang, D; Zhao, FJ; Huang, CF; Lian, X 
2014 
Yes 
Journal of Experimental Botany
ISSN: 0022-0957
EISSN: 1460-2431 
65 
17 
4849-4861 
English 
24963001 
WOS:000342927200013 
Manganese (Mn) is an essential micronutrient for plants playing an important role in many physiological functions. OsNRAMP5 is a major transporter responsible for Mn and cadmium uptake in rice, but whether it is involved in the root-to-shoot translocation and distribution of these metals is unknown. In this work, OsNRAMP5 was found to be highly expressed in hulls. It was also expressed in leaves but the expression level decreased with leaf age. High-magnification observations revealed that OsNRAMP5 was enriched in the vascular bundles of roots and shoots especially in the parenchyma cells surrounding the xylem. The osnramp5 mutant accumulated significantly less Mn in shoots than the wild-type plants even at high levels of Mn supply. Furthermore, a high supply of Mn could compensate for the loss in the root uptake ability in the mutant, but not in the root-to-shoot translocation of Mn, suggesting that the absence of OsNRAMP5 reduces the transport of Mn from roots to shoots. The results suggest that OsNRAMP5 plays an important role in the translocation and distribution of Mn in rice plants in addition to its role in Mn uptake.