Mechanism by which GmPHR regulates the response of soybean rhizosphere microbial communities to low-phosphorus stress

Tomatoes have a wide variety of cultivars and high yields, making them one of the main vegetables in China. They are also characterized by their rich nutritional content and good marketability. Phosphorus, as a macronutrient essential for plant growth and development, plays an important role in these processes. A deficiency in phosphorus can cause plants to be stunted, poorly developed, and severely affect both the yield and quality of tomatoes. In soil, phosphorus mainly exists in forms that plants cannot absorb, such as fixed and organic states. Therefore, the available phosphorus is very limited, far below the concentration required for plant growth, thereby limiting plant development and crop yield. To address this issue, people have begun to apply chemical fertilizers on a large scale. When chemical fertilizers are added to the soil, they easily react with calcium ions and other elements, forming precipitates, which leads to an increase in fertilizer application. However, excessive use of fertilizers exceeds the soil's capacity and causes serious environmental pollution, leading to eutrophication of water bodies. Currently, China is at a critical stage of developing green agriculture, and reducing fertilizer usage while increasing efficiency is a key strategic goal for sustainable agricultural development. Therefore, exploring mechanisms for efficient phosphorus absorption in tomatoes is particularly important.