Articles
Essential oil content and physiological response of Mentha genotypes under different UV-treatments
Article number
1358_41
Pages
319 – 326
Language
English
Abstract
Mentha sp. are widely used as feedstock for essential oil production and components in multiple products of the food industry.
Healthy and vital plants with high amounts of essential oils are prerequisite for maximizing yield.
Light as a main resource for efficient photosynthesis impacts plant vitality, biomass and essential oils.
Therefore, this study focuses on the essential oil content and physiological response of Mentha genotypes under different UV scenarios.
For this, three different Mentha genotypes (Mentha × piperita Multimentha, Mentha × piperita Fränkische Blaue and Mentha rotundifolia Apfelminze) were exposed to different levels of UV radiation (natural UV, UV-B-increased (1.5 W m-2, 157% of control) and shaded regimes (62% of control)). Non-invasive phenotyping provided information on plant vitality using hyperspectral vegetation indices (VIs). Plant vitality was significantly influenced by light regime.
Additionally, genotypes were distinguishable via VIs under same UV-conditions and their fresh biomass varied significantly as well. Apfelminze and Fränkische Blaue did not show treatment related differences in dry matter, while Multimentha yielded significantly higher dry matter under control conditions, followed by the shaded scenario followed by UV-increased conditions.
However, under increased UV-B radiation, all genotypes showed the highest essential oil content, especially the Multimentha genotype.
In conclusion the results reveal that the three Mentha genotypes react differently in regard to biomass accumulation and overall stress under UV-B exposure and UV-B and PAR reduction.
In the face of higher irradiation due to climate change, a targeted selection of genotypes seems promising to ensure high yields from Mentha.
Healthy and vital plants with high amounts of essential oils are prerequisite for maximizing yield.
Light as a main resource for efficient photosynthesis impacts plant vitality, biomass and essential oils.
Therefore, this study focuses on the essential oil content and physiological response of Mentha genotypes under different UV scenarios.
For this, three different Mentha genotypes (Mentha × piperita Multimentha, Mentha × piperita Fränkische Blaue and Mentha rotundifolia Apfelminze) were exposed to different levels of UV radiation (natural UV, UV-B-increased (1.5 W m-2, 157% of control) and shaded regimes (62% of control)). Non-invasive phenotyping provided information on plant vitality using hyperspectral vegetation indices (VIs). Plant vitality was significantly influenced by light regime.
Additionally, genotypes were distinguishable via VIs under same UV-conditions and their fresh biomass varied significantly as well. Apfelminze and Fränkische Blaue did not show treatment related differences in dry matter, while Multimentha yielded significantly higher dry matter under control conditions, followed by the shaded scenario followed by UV-increased conditions.
However, under increased UV-B radiation, all genotypes showed the highest essential oil content, especially the Multimentha genotype.
In conclusion the results reveal that the three Mentha genotypes react differently in regard to biomass accumulation and overall stress under UV-B exposure and UV-B and PAR reduction.
In the face of higher irradiation due to climate change, a targeted selection of genotypes seems promising to ensure high yields from Mentha.
Authors
C. Hubert, G. Steyns, T. Kraska, K. Luhmer, M.D. Moll, R. Pude
Keywords
Mentha × piperita, Mentha rotundifolia, essential oils, volatile organic compounds, phenotyping, UV-radiation
Online Articles (44)