Legume Genomics and Genetics 2026, Vol.17, No.1, 32-48 http://cropscipublisher.com/index.php/lgg 42 perturbation and downregulation of key leucine-rich repeat receptor-like kinases (LRR-RLKs) (Figure 3) (Li et al., 2023). In L14, these LRR-RLKs were upregulated and proposed to enhance ABA-induced stomatal closure and drought avoidance. Collectively, these comparative datasets show that tolerant varieties either mount earlier and more coordinated activation of signaling and protective pathways or minimize transcriptional and physiological disruption through drought-avoidance traits. Figure 3 Comparative transcrictome analysis of soybean drought tolerance 6.2 Analysis of expression patterns of key drought resistance genes Within these comparative datasets, several classes of key drought resistance genes display characteristic expression patterns that separate tolerant from sensitive genotypes. In JD, DEGs in JA and brassinosteroid signaling, calcium channels, MAPKs, cell wall remodeling, and stress-related proteins (e.g., peroxidases, LEA-like proteins) were preferentially induced under drought, whereas their orthologs were weakly or inconsistently regulated in N1 (Xuan et al., 2022). Numerous TFs, including NAC, bZIP, MYB, WRKY, ERF, and HD-ZIP family members, were more abundant in JD than in N1, and some TFs (such as specific NACs, WRKYs, and MYBs) were exclusively differentially expressed in the tolerant cultivar, suggesting a tolerant genotype-specific regulatory layer (Xuan et al., 2022). In wild soybean, DEGs associated with water and auxin
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