ArticleBMC plant biology2023
Promoter characterization of a citrus linalool synthase gene mediating interspecific variation in resistance to a bacterial pathogen.
Article in BMC plant biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 7 citations in OpenAlex.
- Overexpression of EXO70E2 inGenes · 2026Article
- TaWAKL8-2B, a wall-associated receptor-like kinase, mediates wheat rust resistance by linalool and ROS accumulation.Stress biology · 2025Article
- Genomic analysis of terpene synthase family and characterization of ent-kaurene synthase in Chenopodium quinoa.Molecular genetics and genomics : MGG · 2025Article
- Partnering essential oils with antibiotics: proven therapies against bovineFrontiers in cellular and infection microbiology · 2023Article
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9 authors at 2 institutions in 1 country.
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Abstract
backgroundTerpenoids play essential roles in plant defense against biotic stresses. In Citrus species, the monoterpene linalool mediates resistance against citrus canker disease caused by the gram-negative bacteria Xanthomonas citri subsp. citri (Xcc). Previous work had associated linalool contents with resistance; here we characterize transcriptional responses of linalool synthase genes.
resultsLeaf linalool contents are highly variable among different Citrus species. "Dongfang" tangerine (Citrus reticulata), a species with high linalool levels was more resistant to Xcc than "Shatian" pummelo (C. grandis) which accumulates only small amounts of linalool. The coding sequences of the major leaf-expressed linalool synthase gene (STS4) are highly conserved, while transcript levels differ between the two Citrus species. To understand this apparent differential transcription, we isolated the promoters of STS4 from the two species, fused them to a GUS reporter and expressed them in Arabidopsis. This reporter system revealed that the two promoters have different constitutive activities, mainly in trichomes. Interestingly, both linalool contents and STS4 transcript levels are insensitive to Xcc infestation in citrus plants, but in these transgenic Arabidopsis plants, the promoters are activated by challenge of a bacterial pathogen Pseudomonas syringae, as well as wounding and external jasmonic acid treatment.
conclusionsOur study reveals variation in linalool and resistance to Xcc in citrus plants, which may be mediated by different promoter activities of a terpene synthase gene in different Citrus species.
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