Publications by authors named "J M Belles"
Hydroxylated monoterpenes (HMTPs) are differentially emitted by tomato (Solanum lycopersicum) plants resisting bacterial infection. We have studied the defensive role of these volatiles in the tomato response to bacteria, whose main entrance is through stomatal apertures. Treatments with some HMTPs resulted in stomatal closure and pathogenesis-related protein 1 (PR1) induction.
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- Biotic and abiotic stresses, such as drought and pathogens, limit crop productivity, leading to a need for sustainable agricultural strategies.
- Plants respond to stress by closing their stomata and releasing volatile organic compounds, with ()-3-hexenyl butyrate (HB) identified as a key natural inducer that enhances stomatal immunity.
- Research reveals that HB initiates defense responses independent of traditional pathways, improving water stress resilience and fruit productivity in tomatoes, and bolstering resistance against pathogen infections in both potato and tomato plants.
Background: Salicylic acid (SA) is a major plant hormone that mediates the defence pathway against pathogens. SA accumulates in highly variable amounts depending on the plant-pathogen system, and several enzyme activities participate in the restoration of its levels. Gentisic acid (GA) is the product of the 5-hydroxylation of SA, which is catalysed by S5H, an enzyme activity regarded as a major player in SA homeostasis.
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- - The study focuses on new plasmids designed to produce infectious viroid clones that use dimeric cDNAs for generating transcripts, which can replicate longer forms and can be made both in vitro and in vivo through different inoculation methods.
- - Results indicate that agro-inoculated plants showed more consistent and severe disease symptoms compared to other methods, with variations in viroid accumulation and form types influenced by the host and method without a direct correlation to symptom severity.
- - Key findings highlight ribosomal stress as a new indicator of disease caused by nuclear-replicating viroids, linked to increased defensive signaling and changes in ribosome biogenesis, supporting the new plasmid's effectiveness for future viroid-host interaction studies.
New strategies of control need to be developed with the aim of economic and environmental sustainability in plant and crop protection. Metabolomics is an excellent platform for both understanding the complex plant-pathogen interactions and unraveling new chemical control strategies. GC-MS-based metabolomics, along with a phytohormone analysis of a compatible and incompatible interaction between tomato plants and f.
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