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September 08-10, 2025 | Valencia, Spain
GPMB 2025

Unregulated GmAGL82 due to phosphorus deficiency positively regulates root nodule growth in soybean

Yingbin Xue, Speaker at Plant Biology Conferences
Guangdong Ocean University, China
Title : Unregulated GmAGL82 due to phosphorus deficiency positively regulates root nodule growth in soybean

Abstract:

Nitrogen fixation, occurring through the symbiotic relationship between legumes and rhizobia in root nodules, is crucial in sustainable agriculture. Nodulation and soybean production are influenced by low levels of phosphorus stress. In this study, we discovered a MADS transcription factor, GmAGL82, which is preferentially expressed in nodules and displays significantly increased expression under conditions of phosphate (Pi) deficiency. The overexpression of GmAGL82 in composite transgenic plants resulted in an increased number of nodules, higher fresh weight, and enhanced soluble Pi concentration, which subsequently increased the nitrogen content, phosphorus content, and overall growth of soybean plants. Additionally, transcriptome analysis revealed that the overexpression of GmAGL82 significantly upregulated the expression of genes associated with nodule growth,such as GmENOD100, GmHSP17.1, GmHSP17.9, GmSPX5, and GmPIN9d. Based on these findings, we concluded that GmAGL82 likely participates in the phosphorus signaling pathway and positively regulates nodulation in soybeans. The findings of this research may lay the theoretical groundwork for further studies and candidate gene resources for the genetic improvement of nutrient-efficient soybean varieties in acidic soil.

Biography:

Yingbin Xue graduated from South China Agricultural University with a PhD degree in agronomy (plant nutrition). After graduation,he joined the South China Branch of National Saline-Alkali Tolerant Rice Technology Innovation Center, mainly engaged in the study of physiological and molecular mechanisms of rice, soybean and other crops adapted to abiotic stresses such as salt damage and nutrient deficiency. He has published more than 20 papers in Journal of Experimental Botany, International Journal of Molecular Sciences, Journal of South China Agricultural University and other journals, co-edited two books, and authorized two national invention patents and two utility model patents. 

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