The physiological molecular mechanism by which auxin mediates low phosphorus stress signals to regulate the morphological configuration of soybean roots (PRJCA047920)
Under low-phosphorus stress conditions, tobacco plants overexpressing the GmAux/IAA16 gene significantly enhanced their adaptability to phosphorus stress by promoting root growth and optimizing nutrient absorption. Compared with the wild type, after 15 days of cultivation under low phosphorus conditions, the total root length, total surface area, volume and the number of lateral roots of the overexpressed plants significantly increased, the nitrogen and phosphorus contents of the leaves and roots significantly improved, and the plant height, stem diameter, total dry weight and root-crown ratio also significantly increased. In addition, the activities of enzymes such as ACP, POD, IAAO, and RNase in transgenic plants significantly increased, indicating that GmAux/IAA16 may enhance the adaptability of soybeans to low phosphorus stress by regulating the activities of these enzymes. This study provides a scientific basis for the application of the Aux/IAA16 gene in soybean molecular breeding and the improvement of crop phosphorus efficiency.