Auxin Response Factor Gene Family Plays Key Role in Plant Growth and Stress Response

A recent study published in BMC Plant Biology has shed new light on the auxin response factor (ARF) gene family, which is essential for plant growth, development, and stress response. The research, led by Wei Li from Hebei Agricultural University, systematically identified the ARF gene family using a pan-genomic approach based on 47 high-quality potato genomes. The study revealed that among the 28 members of the potato ARF pan-gene family, no core or private genes were identified, while one gene was classified as near-core, and the remaining genes were considered non-essential.

Key Takeaways:

• The ARF gene family is a key regulator involved in plant growth, development, and stress response.
• A pan-genomic approach based on 47 high-quality potato genomes was used to systematically identify the ARF gene family.
• Among the 28 members of the potato ARF pan-gene family, no core or private genes were identified, while one gene was classified as near-core, and the remaining genes were considered non-essential.
• Ka/Ks analysis indicated that a single gene was under positive selection, while the rest of the family members were subject to purifying selection.
• Structural variations across the 21 potato genomes did not significantly alter the expression of ARF pan-gene family members, and no notable expression differences were detected.
• However, these structural variations did lead to changes in conserved domains in certain strains.
• RNA-seq analysis revealed differential expression of ARF family members under drought stress compared to control conditions, with variation in expression levels among different genes.
• Transcription factors are involved in regulating the expression of ARF gene family members.
• The study provides a new theoretical reference for drought resistance-breeding in potato.
• The research concluded that the ARF gene family plays a key role in regulating plant adaptation to drought stress.

Statistics:

• The study analyzed 28 members of the potato ARF pan-gene family.
• Ka/Ks analysis indicated that a single gene was under positive selection, while the rest of the family members were subject to purifying selection.
• RNA-seq analysis revealed differential expression of ARF family members under drought stress compared to control conditions.
• The study identified 21 potato genomes with structural variations that led to changes in conserved domains in certain strains.

Sources:

• Li, W., et al. "Pan-genome identification and expression analysis of the ARF gene family in potato." BMC Plant Biology, vol. 25, no. 1, 2025, p. 1435.
• Li, W., et al. Studies from Hebei Agricultural University Add New Findings in the Area of Botany (Pan-genome identification and expression analysis of the ARF gene family in potato). Life Science Weekly, November 4, 2025, p. 6823.