Recently, Institute of Agricultural Resources and Agricultural Regional Planning, Chinese Academy of Agricultural Sciences Soil-Plant Interaction Innovation Team revealed the signal transduction mechanism of crop phosphorus-iron nutrient antagonism, which is the yellow-red soil farmland phosphorus-iron nutrient Synergistic and efficient use of crop genetic improvement provides an important theoretical basis. Relevant research results were published in "Molecular Plant (Molecular Plant)".
According to the researcher of , the high-quality and high-yield crops are inseparable from a balanced intake of mineral nutrients. However, there are huge differences in the mineral nutrient content of different cultivated land around the world, and most of the cultivated land has serious nutrient imbalance. For example, a typical nutrient deficiency problem in a large area of yellow-red soil in China is the imbalance of phosphorus-iron nutrients. These soils have too high iron content and low available phosphorus content, which is likely to cause double risks of crop phosphorus deficiency and iron toxicity. Therefore, the imbalance of soil phosphorus-iron nutrients seriously restricts the high-quality and high-yield crops, and at the same time endangers China's food security.
research team found that phosphorus nutrient signal central regulators (PHRs) and iron nutrient signal core regulators (HRZs) jointly mediate the interaction process of phosphorus-iron signaling. PHRs and HRZs regulate their respective protein and transcription levels through mutual inhibition, thereby regulating the expression of downstream phosphorus starvation response genes and iron starvation response genes, so as to respond to different changes in the supply of phosphorus-iron nutrients in the soil to ensure the growth of crops. Further research found that the molecular regulatory module composed of PHRs-HRZs is also present in the model plant Arabidopsis , and it is speculated that this mutual inhibitory molecular module may be widespread in plants. This research provides a new idea for solving the problem of phosphorus-iron nutrient imbalance in yellow-red soil arable land in China by means of molecular breeding.
This research was funded by the National Natural Science Gene Project, Chinese Academy of Agricultural Sciences Young Talent Project and other projects.(Correspondent Jin Yunxiang)
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