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Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties

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2022
Book-of-Abstracts-4th-International-Conference4th-International-Conference-on-Plant-Biology-23rd-SPPS-Meeting-Belgrade-6-8.10.2022 (1.240Mb)
Authors
Milić Komić, Sonja
Živanović, Bojana
Sedlarević Zorić, Ana
Vidović, Marija
Veljovic Jovanovic, Sonja
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Abstract
Three varieties of basil (Ocimum x citriodorum, Ocimum basilicum var. Genovese and Ocimum basilicum var. purpurascens) were used to examine the effect of different PAR intensities (100, 400 and 1400 µmol photons m-2s-1), as well as different UV-B/PAR ratios, on leaf phenolics accumulation, and components of the ascorbate-glutathione cycle. Phenolic compounds represent the most abundant class of secondary metabolites, and their function in plants involves protection against numerous abiotic stresses, role in growth and development, flowering, reproduction and seed dispersion. A preferential accumulation of HCAs over Flav, induction of class III POD activity and decreased ascorbate content were characteristic responses to pro-oxidative effect of the high UV-B/PAR ratio in all three basil varieties. The most remarkable result was the lack of accumulation of epidermal UV absorbing substances, which appeared to be a crucial photoprotective mechanism in sunlight. The contrasting effe...ct of ecologically relevant UV-B radiation on basil plants, pro-oxidative vs. acclimative, was determined by the quality and intensity of the background light. Acclimation of basil to high light comprises a number of processes, among which are the accumulation of epidermal flavonoids and total leaf phenolics, antioxidant response (increase in Asc and GSH) and lack of downregulation of PSII upon increasing light intensity. Among varieties that we used as model system in this study, purple basil, with the highest constitutive amount of anthocyanidins, showed the least induction of epidermal flavonoids and lack of light effect upon transfer from initial 50 to 250 µmol photons m-2s-1.

Keywords:
basil varieties / phenolics / high light / leaf anthocyanins
Source:
4th International Conference on Plant Biology (23rd SPPS Meeting), 2022, 43-
Publisher:
  • Serbian Plant Physiology Society Institute for Biological Research “Siniša Stanković” – National Institute of Republic of Serbia, University of Belgrade Faculty of Biology, University of Belgrade
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)

ISBN: 978-86-912591-6-7

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_rimsi_1873
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/1873
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - CONF
AU  - Milić Komić, Sonja
AU  - Živanović, Bojana
AU  - Sedlarević Zorić, Ana
AU  - Vidović, Marija
AU  - Veljovic Jovanovic, Sonja
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1873
AB  - Three varieties of basil (Ocimum x citriodorum, Ocimum basilicum var. Genovese and Ocimum
basilicum var. purpurascens) were used to examine the effect of different PAR intensities (100, 400
and 1400 µmol photons m-2s-1), as well as different UV-B/PAR ratios, on leaf phenolics accumulation, and components of the ascorbate-glutathione cycle. Phenolic compounds represent the
most abundant class of secondary metabolites, and their function in plants involves protection
against numerous abiotic stresses, role in growth and development, flowering, reproduction and
seed dispersion. A preferential accumulation of HCAs over Flav, induction of class III POD activity
and decreased ascorbate content were characteristic responses to pro-oxidative effect of the high
UV-B/PAR ratio in all three basil varieties. The most remarkable result was the lack of accumulation
of epidermal UV absorbing substances, which appeared to be a crucial photoprotective mechanism in sunlight. The contrasting effect of ecologically relevant UV-B radiation on basil plants,
pro-oxidative vs. acclimative, was determined by the quality and intensity of the background light.
Acclimation of basil to high light comprises a number of processes, among which are the accumulation of epidermal flavonoids and total leaf phenolics, antioxidant response (increase in Asc and
GSH) and lack of downregulation of PSII upon increasing light intensity. Among varieties that we
used as model system in this study, purple basil, with the highest constitutive amount of anthocyanidins, showed the least induction of epidermal flavonoids and lack of light effect upon transfer
from initial 50 to 250 µmol photons m-2s-1.
PB  - Serbian Plant Physiology Society  Institute for Biological Research “Siniša Stanković” – National Institute of Republic of Serbia,  University of Belgrade  Faculty of Biology, University of Belgrade
C3  - 4th International Conference on Plant Biology (23rd SPPS Meeting)
T1  - Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties
SP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1873
ER  - 
@conference{
author = "Milić Komić, Sonja and Živanović, Bojana and Sedlarević Zorić, Ana and Vidović, Marija and Veljovic Jovanovic, Sonja",
year = "2022",
abstract = "Three varieties of basil (Ocimum x citriodorum, Ocimum basilicum var. Genovese and Ocimum
basilicum var. purpurascens) were used to examine the effect of different PAR intensities (100, 400
and 1400 µmol photons m-2s-1), as well as different UV-B/PAR ratios, on leaf phenolics accumulation, and components of the ascorbate-glutathione cycle. Phenolic compounds represent the
most abundant class of secondary metabolites, and their function in plants involves protection
against numerous abiotic stresses, role in growth and development, flowering, reproduction and
seed dispersion. A preferential accumulation of HCAs over Flav, induction of class III POD activity
and decreased ascorbate content were characteristic responses to pro-oxidative effect of the high
UV-B/PAR ratio in all three basil varieties. The most remarkable result was the lack of accumulation
of epidermal UV absorbing substances, which appeared to be a crucial photoprotective mechanism in sunlight. The contrasting effect of ecologically relevant UV-B radiation on basil plants,
pro-oxidative vs. acclimative, was determined by the quality and intensity of the background light.
Acclimation of basil to high light comprises a number of processes, among which are the accumulation of epidermal flavonoids and total leaf phenolics, antioxidant response (increase in Asc and
GSH) and lack of downregulation of PSII upon increasing light intensity. Among varieties that we
used as model system in this study, purple basil, with the highest constitutive amount of anthocyanidins, showed the least induction of epidermal flavonoids and lack of light effect upon transfer
from initial 50 to 250 µmol photons m-2s-1.",
publisher = "Serbian Plant Physiology Society  Institute for Biological Research “Siniša Stanković” – National Institute of Republic of Serbia,  University of Belgrade  Faculty of Biology, University of Belgrade",
journal = "4th International Conference on Plant Biology (23rd SPPS Meeting)",
title = "Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties",
pages = "43",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1873"
}
Milić Komić, S., Živanović, B., Sedlarević Zorić, A., Vidović, M.,& Veljovic Jovanovic, S.. (2022). Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties. in 4th International Conference on Plant Biology (23rd SPPS Meeting)
Serbian Plant Physiology Society  Institute for Biological Research “Siniša Stanković” – National Institute of Republic of Serbia,  University of Belgrade  Faculty of Biology, University of Belgrade., 43.
https://hdl.handle.net/21.15107/rcub_rimsi_1873
Milić Komić S, Živanović B, Sedlarević Zorić A, Vidović M, Veljovic Jovanovic S. Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties. in 4th International Conference on Plant Biology (23rd SPPS Meeting). 2022;:43.
https://hdl.handle.net/21.15107/rcub_rimsi_1873 .
Milić Komić, Sonja, Živanović, Bojana, Sedlarević Zorić, Ana, Vidović, Marija, Veljovic Jovanovic, Sonja, "Distinctive regulation of different phenolics biosynthesis by high light and UV-B in three basil varieties" in 4th International Conference on Plant Biology (23rd SPPS Meeting) (2022):43,
https://hdl.handle.net/21.15107/rcub_rimsi_1873 .

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