ArticlePlant cell reports2026
Overexpression of PagAPX8 promotes poplar growth and enhances tolerance to drought and salt stress.
Article in Plant cell reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- OsbZIP60 Positively Regulates Salt-Stress Tolerance in Rice.International journal of molecular sciences · 2026Article
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11 authors.
Funding
Abstract
key messagePagAPX8 enhances drought and salt tolerance in 84K poplar via boosting antioxidant enzyme activities to maintain ROS homeostasis, actingas a promising gene resource for stress-resistant woody plant breeding. Poplar (Populus) has been identified as a key species in the context of ecological restoration and reforestation. Nonetheless, abiotic stresses, including drought and salinization, impede growth by leading to a significant buildup of reactive oxygen species (ROS). Ascorbate peroxidase (APX) is an essential enzyme that plays a crucial role in scavenging ROS and improving stress resistance in plants. However, the specific roles of APX genes in poplars under stress conditions, such as drought and salinization, remain ambiguous. In this study, we examined 11 PagAPX genes in 84 K poplar, and the overexpression of PagAPX8 not only enhanced the growth of poplar but also increased the activity of the APX enzyme in poplar plants. In comparison with non-transgenic poplar plants (NT), PagAPX8-overexpressing poplars (PagAPX8 OE) demonstrated enhanced tolerance to drought and salt stress, as indicated by increased fresh and dry weights, and superior root development. Physiological analysis revealed that PagAPX8 OE plants exhibited significantly higher ROS-scavenging capacity, achieved by increased APX, superoxide dismutase (SOD), and catalase (CAT) activity, which resulted in a reduction of H₂O₂ and O₂⁻ accumulation in PagAPX8 OE plants. Overall, this study indicated that PagAPX8 improved drought and salt tolerance in poplar by regulating ROS homeostasis, thus underlining its potential as a valuable genetic resource for enhancing stress resistance in woody plants.
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