ArticleBMC genomics2025
Heterologous expression of physic nut JcHDZ25 confers tolerance to drought stress in transgenic rice.
Article in BMC genomics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- SlERF.D2-mediated antagonism between ethylene and ABA signaling pathways modulates osmotic stress adaptation in tomato.Horticulture research · 2026Article
- Identification and characterization of LEA gene family in physic nut and functional analysis ofFrontiers in plant science · 2026Article
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8 authors.
Funding
Abstract
backgroundThe HD-Zip family of plant-specific transcription factors coordinates developmental processes and abiotic stress adaptation, including drought tolerance in bioenergy crops such as physic nut. Although HD-Zip proteins are known regulators of stress responses, the functional roles of physic nut HD-Zip genes in drought adaptation remain uncharacterized.
resultsIn this study, we functionally characterized JcHDZ25, a drought-inducible HD-Zip I gene from physic nut, which is predominantly expressed in roots and upregulated by ABA and drought. Subcellular localization and transcriptional activity assays confirmed that JcHDZ25 localized to the nucleus and exhibited intrinsic transcriptional activation. Transgenic rice overexpressing JcHDZ25 displayed enhanced drought tolerance and ABA sensitivity compared to wild-type plants. Under drought stress, JcHDZ25-overexpressing lines showed significantly higher proline content, elevated SOD and CAT activities, and reduced electrolyte leakage and MDA accumulation relative to wild-type controls. Furthermore, transgenic plants showed higher expression of abiotic stress-responsive genes (OsAPX2, OsCATA, OsLEA3, OsP5 CS, OsDREB2 A, OsADC1) and ABA pathway-related genes (OsNCED3, OsRD29 A) under drought stress compared to wild-type plants.
conclusionsJcHDZ25 positively regulates drought tolerance in rice possibly through an ABA-dependent transcriptional regulation, providing mechanistic insights into physic nut's drought adaptation and highlighting its potential as a genetic resource for engineering stress-resilient crops.
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