Transcriptome and Targeted Hormone Metabolome Reveal the Mechanism of Flower Abscission in Soybeans Under Shade.

ABSTRACT: Shade-induced flower abscission in soybean plants is a significant factor limiting yield improvement. Under shaded conditions, significant differences exist in the flower abscission rates among different soybean varieties, but the regulatory mechanisms remain unclear. This study selected Tiedou 44 (T44) and Liaodou 32 (L32) as experimental materials. Results indicate that under shaded conditions, the flower abscission rate of T44 was significantly higher than that of L32. Physiological analysis revealed that cell wall degradation enzyme activity in T44 pedicels was significantly higher than in L32. Furthermore, compared to L32, T44 flowers under shade conditions exhibited significantly higher levels of IAA, IAA-amino acid conjugates, and ABA. The expression levels of PIN family gene

SUBMITTER: Tan Z 

PROVIDER: S-EPMC12610579 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature