The study revealed the molecular basis of phosphorus nutrient cycling in Chinese milk vetch

2022-06-11 0 By

Recently, the soil plant Interaction innovation team of institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences (CAS) has identified and analyzed the molecular mechanism of phosphorus efficient Chinese milk vex, which will accumulate important materials and experience for future phosphorus efficient Chinese milk vex breeding improvement and field management.The findings were published in the Journal of Cleaner Production.According to Yi Keke, green manure is widely used in agro-ecosystems and plays a crucial role in restoring degraded environments and improving soil fertility.Astragalus sinicus is one of the most widely used varieties of green manure.The root of vetch can form nodule with nitrogen-fixing bacteria and has strong biological nitrogen fixing ability.It was found that inverting Chinese milk vetch could reduce the loss of active nitrogen and increase the circulation of nitrogen nutrients in soil.In view of the excessive application of phosphorus fertilizer and the consequent risk of environmental pollution, how to improve the phosphorus absorption capacity of green fertilizer with nitrogen fixation ability, achieve high accumulation of nitrogen and phosphorus nutrients, and further improve the nitrogen and phosphorus cycle in the agricultural ecosystem is a difficult problem to limit the development of green fertilizer industry.In this study, different varieties of Chinese milk veg were selected to evaluate the physiological indexes of Chinese milk veg under different phosphorus levels, and the phosphorus efficient Chinese milk veg variety XinzI-1 was identified.It was found that XinzI-1 had a high tolerance to phosphorus starvation, and its phosphorus content was about 25%-60% higher than other varieties. Xinzi-1 showed a high level of phosphorus accumulation in both low and high PHOSPHORUS environments, indicating that XinzI-1 had a high capacity of phosphorus activation and accumulation.In this study, we further analyzed the molecular mechanism of phosphorus efficiency of XinzI-1 by spatio-temporal full-length transcriptome analysis, and found that the phosphorus signaling pathway network of XinzI-1 changed globally under phosphorus deficiency conditions.Under p starvation, the expression profile of xinzI-1 core genes involved in p transport and signal transduction changed significantly, such as phosphate transporter and acid phosphatase gene expression was significantly induced, which increased activated soil P and P absorption capacity.At the same time, vacuolar phosphorus effluent genes were significantly upregulated to release vacuolar phosphorus for storage and supply of plant growth, and a high efficiency recycling system model based on nitrogen and phosphorus cocoordination between legume green manure and field crops was proposed.This study provided a new idea for the efficient circulation of nitrogen and phosphorus nutrients of green manure crops in the sustainable agricultural ecosystem, as well as the rational utilization, breeding and variety evaluation of green manure crops.The research was supported by the Science and Technology Partnership Program of the Ministry of Science and Technology, the Green Fertilizer Industry Technology System, and the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences.Declaration: The copyright of this article belongs to the original author, if there is a source error or infringement of your legitimate rights and interests, you can contact us through the mailbox, we will promptly deal with.Email address: