Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress
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INVESTIGACIONMetadatos
Título
Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stressFecha de publicación
2024-04-03Editor
WileyISSN
1435-8603; 1438-8677Cita bibliográfica
Vives-Peris, V., Gómez-Cadenas, A. and Pérez-Clemente, R.M. (2024), Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress. Plant Biology J, 26: 521-531.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Plants face a wide range of biotic and abiotic stress conditions, which are further intensified by climate change. Among these stressors, increased irradiation in terms of intensity and wavelength range can lead to ... [+]
Plants face a wide range of biotic and abiotic stress conditions, which are further intensified by climate change. Among these stressors, increased irradiation in terms of intensity and wavelength range can lead to detrimental effects, such as chlorophyll degradation, destruction of the PSII reaction center, generation of ROS, alterations to plant metabolism, and even plant death.
Here, we investigated the responses of two citrus genotypes, Citrus macrophylla (CM), and Troyer citrange (TC) to UV-B light-induced stress, by growing plants of both genotypes under control and UV-B stress conditions for 5 days to evaluate their tolerance mechanisms.
TC seedlings had higher sensitivity to UV-B light than CM seedlings, as they showed more damage and increased levels of oxidative harm (indicated by the accumulation of MDA). In contrast, CM seedlings exhibited specific adaptive mechanisms, including accumulation of higher levels of proline under stressful conditions, and enhanced antioxidant capacity, as evidenced by increased ascorbate peroxidase activity and upregulation of the CsAPX2 gene. Phytohormone accumulation patterns were similar in both genotypes, with a decrease in ABA content in response to UV-B light. Furthermore, expression of genes involved in light perception and response was specifically affected in the tolerant CM seedlings, which exhibited higher expression of CsHYH/CsHY5 and CsRUP1-2 genes.
These findings underscore the importance of the antioxidant system in citrus plants subjected to UV-B light-induced stress and suggest that CsHYH/CsHY5 and CsRUP1-2 could be considered genes associated with tolerance to such challenging conditions. [-]
Publicado en
Plant Biology Vol. 26, Issue4 (June 2024)Entidad financiadora
Universitat Jaume I | Ministerio de Ciencia e Innovación / Agencia Estatal de Investigación /10.13039/501100011033/FEDER | European Union NextGenerationEU/PRTR
Código del proyecto o subvención
UJI-A2021-10 | UJI-B2022-18 | PID2022-137825OB-I00 | TED2021-129795B-I00
Derechos de acceso
info:eu-repo/semantics/openAccess
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