Manganese(Mn)is an essential trace element for almost all living organisms.In plants,Mn deficiency,which is occurs in calcareous soils or alkaline soils,severely limiting crop yields.However,the potential mechanism of...Manganese(Mn)is an essential trace element for almost all living organisms.In plants,Mn deficiency,which is occurs in calcareous soils or alkaline soils,severely limiting crop yields.However,the potential mechanism of Mn transport in Triticum aestivum is still obscure.Here,we found that TaNRAMP3,a member of the naturally resistant macrophage protein(NRAMP)family in Triticum aestivum,is located in the plasma membrane of protoplasts and functions as an influx transporter for Mn in yeast(Δsmf1).The expression of TaNRAMP3 was induced under Mn-deficiency condi-tions.Furthermore,TaNRAMP3-RNAi plants exhibited a sensitive phenotype,while transgenic plants overexpressing TaNRAMP3 showed a tolerant phenotype.In addition,TaNRAMP3 rescued the sensitive phenotype of Arabidopsis nramp1 mutant under Mn deficiency condition.In summary,our study reveals the key role of TaNRAMP3 in Mn transport in Triticum aestivum,allowing it to adapt to Mn-deficiency stress.These findings provide new insights for the cultivation of Mn-deficiency tolerant wheat varieties.展开更多
基金funded by a grant from the National Natural Science Foundation of China(32222008 to C.W,31900236 to ZQ.Z).
文摘Manganese(Mn)is an essential trace element for almost all living organisms.In plants,Mn deficiency,which is occurs in calcareous soils or alkaline soils,severely limiting crop yields.However,the potential mechanism of Mn transport in Triticum aestivum is still obscure.Here,we found that TaNRAMP3,a member of the naturally resistant macrophage protein(NRAMP)family in Triticum aestivum,is located in the plasma membrane of protoplasts and functions as an influx transporter for Mn in yeast(Δsmf1).The expression of TaNRAMP3 was induced under Mn-deficiency condi-tions.Furthermore,TaNRAMP3-RNAi plants exhibited a sensitive phenotype,while transgenic plants overexpressing TaNRAMP3 showed a tolerant phenotype.In addition,TaNRAMP3 rescued the sensitive phenotype of Arabidopsis nramp1 mutant under Mn deficiency condition.In summary,our study reveals the key role of TaNRAMP3 in Mn transport in Triticum aestivum,allowing it to adapt to Mn-deficiency stress.These findings provide new insights for the cultivation of Mn-deficiency tolerant wheat varieties.
