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Crop Biotech Update

OsMTP11 Gene Regulates Magnesium Transport and Homeostasis in Rice

May 23, 2018

Metal tolerance proteins (MTPs), which belong to the cation diffusion facilitator family (CDF), have been known to be involved in metal transport and homeostasis in different plant species. The team of Gang Ma from Nanjing Agricultural University in China recently studied the role of the rice gene OsMTP11, which encodes a CDF.

The team found that expression of OsMTP11 enhances manganese (Mn) tolerance in the Mn-sensitive yeast mutant. Meanwhile, knockdown of OsMTP11 in rice resulted in growth inhibition due to the presence of high concentrations of Mn, leading to increased accumulation of Mn in the shoots and roots.

Overexpression of OsMTP11 was found to enhance Mn tolerance in rice, even under a toxic level of Mn. Analysis revealed that the OsMTP11 protein is localized to the trans-Golgi network (TGN), and regulates Mn relocalization under high levels of Mn.

These suggest that OsMTP11 protein is required for Mn homeostasis and contributes towards Mn tolerance in rice.

For more information, read the article in Plant Science.