Biologia plantarum 60:355-366, 2016 | DOI: 10.1007/s10535-015-0580-4

Anatomical, physiological, and biochemical traits involved in the UV-B radiation response in highbush blueberry

M. Reyes-Díaz1,2,*, C. Meriño-Gergichevich2, C. Inostroza-Blancheteau3, M. Latsague4, P. Acevedo5,6, M. Alberdi1,2
1 Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
2 Centro Interacción Planta-Suelo y Biotecnología de Recursos Naturales, Núcleo Científico y Tecnológico de los Biorecursos, Universidad de La Frontera, Temuco, Chile
3 Núcleo de Investigación en Producción Alimentaria, Facultad de Recursos Naturales, Escuela de Agronomía, Universidad Católica de Temuco, Temuco, Chile
4 Escuela de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
5 Departamento de Ciencias Físicas, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
6 Centro de Optica y Fotónica, Universidad de Concepción, Casilla, Concepción, Chile

The effects of a long-term simulated spring-summer UV-B daily course on some anatomical, physiological, and biochemical features were studied in new and old leaves of blueberry (Vaccinium corymbosum L.) cultivars Legacy, Brigitta, and Bluegold. The results show that under UV-B exposure, leaf thickness increased in Bluegold due to an increased intercellular cavities. By contrast, Brigitta maintained its leaf thickness. The net photosynthetic rate was not significantly affected by the UV-B radiation in any of the cultivars; however, Brigitta presented a better photosystem II performance, since this cultivar had more efficient photochemistry under the UV-B radiation. In addition, Brigitta also maintained enhanced total phenol and total anthocyanin content compared to the other cultivars. In conclusion, Brigitta was more resistant to the UV-B radiation than the other two cultivars.

Keywords: antioxidants; carotenoids; chlorophyll content; chlorophyll fluorescence; net photosynthetic rate; Vaccinium corymbosum
Subjects: UV-B radiation; antioxidants; carotenoids; chlorophyll content; chlorophyll a fluorescence; net photosynthetic rate; anthocyanins; phenols; leaf anatomy; highbush blueberry
Species: Vaccinium corymbosum

Received: March 25, 2015; Revised: September 7, 2015; Accepted: September 14, 2015; Published: June 1, 2016Show citation

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Reyes-Díaz, M., Meriño-Gergichevich, C., Inostroza-Blancheteau, C., Latsague, M., Acevedo, P., & Alberdi, M. (2016). Anatomical, physiological, and biochemical traits involved in the UV-B radiation response in highbush blueberry. Biologia plantarum, 60(2), 355-366. doi: 10.1007/s10535-015-0580-4.
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