Chinese Bulletin of Botany ›› 2018, Vol. 53 ›› Issue (4): 451-455.DOI: 10.11983/CBB18056
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Huang Xinyuan*(), Zhao Fangjie
Received:
2018-03-08
Accepted:
2018-03-30
Online:
2018-07-01
Published:
2018-09-11
Contact:
Huang Xinyuan
About author:
These authors contributed equally to this paper
Huang Xinyuan, Zhao Fangjie. A Defensin-like Protein Regulates Cadmium Accumulation in Rice[J]. Chinese Bulletin of Botany, 2018, 53(4): 451-455.
Figure 1 Schematic diagram of the uptake and transport of Cd in rice rootsThe uptake of Cd into rice roots is mediated by OsNRAMP5, which is also responsible for the transport of Cd from cortex cells into endodermis. Part of Cd is then sequestered into vacuoles by OsHMA3. In xylem parenchyma cells, Cd is chelated with CAL1 in the cytosol and then is secreted into the xylem vessels for long-distance transport to shoots. CAL1 is also expressed in exodermis, where CAL1 is also able to chelate Cd and potentially facilitates the Cd secretion from exodermis into cortex cells. However, it is still not clear whether transporters or vesicular trafficking pathways are responsible for translocating the CAL1-Cd complex across the plasma membrane.
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