Data di Pubblicazione:
2018
Citazione:
Applications of UV-B lighting to enhance phenolic accumulation of sweet basil / H. Mosadegh, A. Trivellini, A. Ferrante, M. Lucchesini, P. Vernieri, A. Mensuali. - In: SCIENTIA HORTICULTURAE. - ISSN 0304-4238. - 229(2018), pp. 107-116.
Abstract:
Ultraviolet B (UV-B) radiation has been previously reported to induce changes in secondary metabolites such as
phenolic compounds by improving, in particularly, the nutritional value of aromatic plants. This study aimed to
evaluate the dynamic biological stress response of Ocimum basilicum L. plants exposed to different UV-B doses
(8.5, 34, 68, 102 kJ m−2 day−1), delivered using three different experimental approaches (acute, sub-acute and
sub-chronic), on phenolic compounds accumulation and chlorophyll a fluorescence parameters. Sweet basil
plants were grown using a novel “in vivo-vitro system” in a closed-type plant production system that allowed the
control of UV-B dose easily and accurately by switching on and off the supplemental UV-B lamps.
Results suggest that the dynamic accumulation of phenolic compounds as well as the ability to maintain the
structural organization of PSII and thus the leaf functionality were dependent on the biologically effective UV-B
dose applied and the exposure-history of the plants.
UV-B doses continuously (as a single exposure) applied significantly increased phenolics, but severely affected
photosynthetic efficiency. Discontinuous UV-B-exposures either applied within a single day (sub-acute) or within
6 days (sub-chronic) yielded in general at the same dose, slightly amount of total phenolics but showed an
improved potential to process light energy through PSII compared to continuous UV-B application.
Our data suggest that an improved accumulation of phenolic compounds can be achieved when UV-B radiation
is applied for long period, within six days, discontinuously, without affecting the efficiency of photosynthetic
apparatus.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Ocimum basilicum L.; The maximum yield of PSII (Fv/Fm); Trapped energy (TRo/CS); Phenolic compounds; Chlorophyll a fluorescence; Ultraviolet-B light; Elicitation strategy
Elenco autori:
H. Mosadegh, A. Trivellini, A. Ferrante, M. Lucchesini, P. Vernieri, A. Mensuali
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