Genome-Wide Identification and Expression Analysis of GASA Genes in Hevea Brasiliensis Reveals Their Involvement in Response to Cold Stress

Strategic Insights -

Research conducted at the Chinese Academy of Tropical Agricultural Sciences has led to a comprehensive understanding of the GASA gene family in Hevea brasiliensis, a tropical crop susceptible to cold stress. The study, which identified 18 HbGASA genes, provided valuable insights into their structure, evolution, and functional diversification. Phylogenetic analysis revealed three distinct clades, while promoter analysis identified multiple hormone-responsive and stress-related regulatory cis-acting elements. The researchers observed significant differences in the expression levels of the 18 HbGASA genes across various tissues, with multiple genes being up-regulated under cold stress.

Key Takeaways:

  • The study identified 18 HbGASA genes in Hevea brasiliensis, which were unevenly distributed across 10 chromosomes.
  • The encoded proteins ranged from 88 to 253 amino acids in length, with the number of exons varying from 2 to 4.
  • Phylogenetic analysis clustered the genes into three distinct clades, with conserved motifs identified in all members.
  • Promoter analysis revealed multiple hormone-responsive and stress-related regulatory cis-acting elements.
  • Transcripts of the 18 HbGASA genes were detected in various tissues, with significant differences observed in their expression levels under cold stress.
  • qRT-PCR results showed that multiple HbGASA genes were significantly up-regulated under cold stress.
  • The study provides valuable insights into the structure, evolution, and functional diversification of GASA genes in Hevea brasiliensis.

Statistics:

  • 18 HbGASA genes were identified in Hevea brasiliensis.
  • The encoded proteins ranged from 88 to 253 amino acids in length.
  • The number of exons varied from 2 to 4 across the 18 HbGASA genes.
  • The 18 HbGASA genes were unevenly distributed across 10 chromosomes.
  • Phylogenetic analysis revealed three distinct clades among the GASA genes.
  • Conserved motifs were identified in 10 out of the 18 HbGASA genes.
  • Multiple hormone-responsive and stress-related regulatory cis-acting elements were identified in the promoters of the GASA genes.

Sources:

  • Genome-wide Identification and Expression Analysis of gasa Genes In hevea Brasiliensis Reveals Their Involvement In Response To Cold Stress. International Journal of Molecular Sciences, 2025;26(7).
  • Chinese Academy of Tropical Agricultural Sciences.
  • NewsRx. Findings from Chinese Academy of Tropical Agricultural Sciences Provides New Data on Molecular Science (Genome-wide Identification and Expression Analysis of gasa Genes In hevea Brasiliensis Reveals Their Involvement In Response ...). Biotech Business Week. May 12, 2025; p 44.