Comprehensive Identification and Abscisic Acid-Responsive Expression Profiling of NAC Transcription Factor in Triterpenoid Saponin in Hedera helix
Xiaoji Deng, Feixiong Zheng, Zhangting Xu, Xiaoping Mao, Zhenming Yu, Xiaoxia Shen
TL;DR
This study identifies a key transcription factor, HhNAC93, that may regulate triterpenoid saponin production in Hedera helix in response to abscisic acid.
Contribution
The study comprehensively identifies and profiles NAC transcription factors, revealing HhNAC93 as a potential regulator of triterpenoid saponin biosynthesis in Hedera helix.
Findings
182 HhNAC transcription factors were identified in Hedera helix.
HhNAC93 is strongly expressed in leaves and correlates with triterpenoid saponin accumulation.
ABA treatment leads to significant gene expression changes in terpenoid biosynthesis pathways.
Abstract
Triterpenoid saponins are important secondary metabolites in plants. Abscisic acid (ABA), as one of the indispensable regulatory hormones in plants, promotes the accumulation of bioactive components in various plants, including triterpenoid saponins; however, its induced mechanism in Hedera helix remains unclear. In this study, the treatment of H. helix leaves with 100 μM ABA led to the identification of 7108 differentially expressed genes (DEGs) within 6 h post-treatment through transcriptomic and bioinformatic analysis. Enrichment analyses of GO terms and KEGG pathways indicated significant enrichment of DEGs in terpenoid backbone biosynthesis pathways. Analysis of DEGs revealed the NAC transcription factor, which is crucial for plant growth regulation, stress response, and secondary metabolite biosynthesis. A total of 182 HhNACs were identified at the genome-wide level, named HhNAC1…
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Taxonomy
TopicsPlant Gene Expression Analysis · Plant biochemistry and biosynthesis · Plant Molecular Biology Research