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Crestani G, Večeřová K, Cunningham N, Badmus UO, Urban O, Jansen MAK. Comprehensive Modulation of Secondary Metabolites in Terpenoid-Accumulating Mentha spicata L. via UV Radiation. PLANTS (BASEL, SWITZERLAND) 2024; 13:1746. [PMID: 38999586 PMCID: PMC11243551 DOI: 10.3390/plants13131746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 07/14/2024]
Abstract
In plants, secondary metabolites change in response to environmental conditions. These changes co-regulate resilience to stressful environmental conditions, plant growth and development, and interactions between plants and the wider ecosystem, while also affecting soil carbon storage and atmospheric and climatic conditions. The objective of this study was to determine the association between UV exposure and the contents of key metabolites, including amino acids, phenolics, flavonoids, terpenoids, carotenoids, tocopherols, and phytosterols. Mentha spicata plantlets were grown in tissue culture boxes for 30 days and then exposed to a low dose of broadband UV-B (291-315 nm; 2.8 kJm-2 biologically effective UV) enriched light for eight days. Metabolite contents were quantified either immediately after the final UV exposure, or after seven days of recovery under photosynthetically active radiation. It was found that UV promoted the production of flavonoids (1.8-fold) ahead of phenolic acids (unchanged). Furthermore, the majority of monoterpenes and sesquiterpenes, constituents of valuable mint essential oil, were significantly increased through UV treatment (up to 90-fold for α-linalool). In contrast, the contents of carotenoids and tocopherols did not increase following UV exposure. A comparison between plants sampled immediately after UV exposure and after seven days of recovery showed that there was an overall increase in the content of carotenoids, mono- and sesquiterpenes, phenolics, and amino acids following recovery, while the contents of sterols and tocopherols decreased. These UV-induced changes in metabolite profile may have important consequences for agriculture, ecology, and even the global climate, and they also provide an exciting opportunity to enhance crop value, facilitating the development of improved products with higher levels of essential oils and added benefits of enhanced flavour, colour, and bioactive content.
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Affiliation(s)
- Gaia Crestani
- School of Biological, Earth and Environmental Science, Environmental Research Institute, University College Cork, North Mall Campus, T23 TK30 Cork, Ireland
| | - Kristýna Večeřová
- Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic
| | - Natalie Cunningham
- School of Biological, Earth and Environmental Science, Environmental Research Institute, University College Cork, North Mall Campus, T23 TK30 Cork, Ireland
| | - Uthman O. Badmus
- School of Biological, Earth and Environmental Science, Environmental Research Institute, University College Cork, North Mall Campus, T23 TK30 Cork, Ireland
| | - Otmar Urban
- Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic
| | - Marcel A. K. Jansen
- School of Biological, Earth and Environmental Science, Environmental Research Institute, University College Cork, North Mall Campus, T23 TK30 Cork, Ireland
- Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic
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2
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Gong F, Zhou X, Yu W, Xu H, Zhou X. Carotenoid Accumulation in the Rhododendron chrysanthum Is Mediated by Abscisic Acid Production Driven by UV-B Stress. PLANTS (BASEL, SWITZERLAND) 2024; 13:1062. [PMID: 38674471 PMCID: PMC11054193 DOI: 10.3390/plants13081062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/30/2024] [Accepted: 04/05/2024] [Indexed: 04/28/2024]
Abstract
Rhododendron chrysanthum (R. chrysanthum) development is hampered by UV-B sunlight because it damages the photosynthetic system and encourages the buildup of carotenoids. Nevertheless, it is still unclear how R. chrysanthum repairs the photosynthetic system to encourage the formation of carotenoid pigments. The carotenoid and abscisic acid (ABA) concentrations of the R. chrysanthum were ascertained in this investigation. Following UV-B stress, the level of carotenoids was markedly increased, and there was a strong correlation between carotenoids and ABA. The modifications of R. chrysanthum's OJIP transient curves were examined in order to verify the regulatory effect of ABA on carotenoid accumulation. It was discovered that external application of ABA lessened the degree of damage on the donor side and lessened the damage caused by UV-B stress on R. chrysanthum. Additionally, integrated metabolomics and transcriptomics were used to examine the changes in differentially expressed genes (DEGs) and differential metabolites (DMs) in R. chrysanthum in order to have a better understanding of the role that ABA plays in carotenoid accumulation. The findings indicated that the majority of DEGs were connected to carotenoid accumulation and ABA signaling sensing. To sum up, we proposed a method for R. chrysanthum carotenoid accumulation. UV-B stress activates ABA production, which then interacts with transcription factors to limit photosynthesis and accumulate carotenoids, such as MYB-enhanced carotenoid biosynthesis. This study showed that R. chrysanthum's damage from UV-B exposure was lessened by carotenoid accumulation, and it also offered helpful suggestions for raising the carotenoid content of plants.
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Affiliation(s)
| | | | | | | | - Xiaofu Zhou
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
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3
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Thakur K, Kumari C, Zadokar A, Sharma P, Sharma R. Physiological and omics-based insights for underpinning the molecular regulation of secondary metabolite production in medicinal plants: UV stress resilience. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108060. [PMID: 37897892 DOI: 10.1016/j.plaphy.2023.108060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/15/2023] [Accepted: 09/25/2023] [Indexed: 10/30/2023]
Abstract
Despite complex phytoconstituents, the commercial potential of medicinal plants under ultraviolet (UV) stress environment hasn't been fully comprehended. Due to sessile nature, these plants are constantly exposed to damaging radiation, which disturbs their natural physiological and biochemical processes. To combat with UV stress, plants synthesized several small organic molecules (natural products of low molecular mass like alkaloids, terpenoids, flavonoids and phenolics, etc.) known as plant secondary metabolites (PSMs) that come into play to counteract the adverse effect of stress. Plants adapted a stress response by organizing the expression of several genes, enzymes, transcription factors, and proteins involved in the synthesis of chemical substances and by making the signaling cascade (a series of chemical reactions induced by a stimulus within a biological cell) flexible to boost the defensive response. To neutralize UV exposure, secondary metabolites and their signaling network regulate cellular processes at the molecular level. Conventional breeding methods are time-consuming and difficult to reveal the molecular pattern of the stress tolerance medicinal plants. Acquiring in-depth knowledge of the molecular drivers behind the defensive mechanism of medicinal plants against UV radiation would yield advantages (economical and biological) that will bring prosperity to the burgeoning world's population. Thus, this review article emphasized the comprehensive information and clues to identify several potential genes, transcription factors (TFs), proteins, biosynthetic pathways, and biological networks which are involved in resilience mechanism under UV stress in medicinal plants of high-altitudes.
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Affiliation(s)
- Kamal Thakur
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Chanchal Kumari
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Ashwini Zadokar
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Parul Sharma
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India
| | - Rajnish Sharma
- Department of Biotechnology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP, 173 230, India.
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4
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Abramova A, Vereshchagin M, Kulkov L, Kreslavski VD, Kuznetsov VV, Pashkovskiy P. Potential Role of Phytochromes A and B and Cryptochrome 1 in the Adaptation of Solanum lycopersicum to UV-B Radiation. Int J Mol Sci 2023; 24:13142. [PMID: 37685948 PMCID: PMC10488226 DOI: 10.3390/ijms241713142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
UV-B causes both damage to the photosynthetic apparatus (PA) and the activation of specific mechanisms that protect the PA from excess energy and trigger a cascade of regulatory interactions with different photoreceptors, including phytochromes (PHYs) and cryptochromes (CRYs). However, the role of photoreceptors in plants' responses to UV-B radiation remains undiscovered. This study explores some of these responses using tomato photoreceptor mutants (phya, phyb1, phyab2, cry1). The effects of UV-B exposure (12.3 µmol (photons) m-2 s-1) on photosynthetic rates and PSII photochemical activity, the contents of photosynthetic and UV-absorbing pigments and anthocyanins, and the nonenzymatic antioxidant capacity (TEAC) were studied. The expression of key light-signaling genes, including UV-B signaling and genes associated with the biosynthesis of chlorophylls, carotenoids, anthocyanins, and flavonoids, was also determined. Under UV-B, phyab2 and cry1 mutants demonstrated a reduction in the PSII effective quantum yield and photosynthetic rate, as well as a reduced value of TEAC. At the same time, UV-B irradiation led to a noticeable decrease in the expression of the ultraviolet-B receptor (UVR8), repressor of UV-B photomorphogenesis 2 (RUP2), cullin 4 (CUL4), anthocyanidin synthase (ANT), phenylalanine ammonia-lease (PAL), and phytochrome B2 (PHYB2) genes in phyab2 and RUP2, CUL4, ANT, PAL, and elongated hypocotyl 5 (HY5) genes in the cry1 mutant. The results indicate the mutual regulation of UVR8, PHYB2, and CRY1 photoreceptors, but not PHYB1 and PHYA, in the process of forming a response to UV-B irradiation in tomato.
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Affiliation(s)
- Anna Abramova
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia; (A.A.); (M.V.); (V.V.K.); (P.P.)
| | - Mikhail Vereshchagin
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia; (A.A.); (M.V.); (V.V.K.); (P.P.)
| | - Leonid Kulkov
- Department of Technologies for the Production of Vegetable, Medicinal and Essential Oils, Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, Timiryazevskaya Street 49, Moscow 127550, Russia;
| | - Vladimir D. Kreslavski
- Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, Pushchino 142290, Russia
| | - Vladimir V. Kuznetsov
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia; (A.A.); (M.V.); (V.V.K.); (P.P.)
| | - Pavel Pashkovskiy
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia; (A.A.); (M.V.); (V.V.K.); (P.P.)
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5
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Liaqat W, Altaf MT, Barutçular C, Nawaz H, Ullah I, Basit A, Mohamed HI. Ultraviolet-B radiation in relation to agriculture in the context of climate change: a review. CEREAL RESEARCH COMMUNICATIONS 2023:1-24. [PMID: 37361481 PMCID: PMC10099031 DOI: 10.1007/s42976-023-00375-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/03/2023] [Indexed: 06/28/2023]
Abstract
Over the past few decades, the amount of ultraviolet-B radiation (UV-B) reaching the earth's surface has been altered due to climate change and stratospheric ozone dynamics. This narrow but highly biologically active spectrum of light (280-320 nm) can affect plant growth and development. Depletion of ozone and climate change are interlinked in a very complicated manner, i.e., significantly contributing to each other. The interaction of climate change, ozone depletion, and changes in UV-B radiation negatively affects the growth, development, and yield of plants. Furthermore, this interaction will become more complex in the coming years. The ozone layer reduction is paving a path for UV-B radiation to impact the surface of the earth and interfere with the plant's normal life by negatively affecting the plant's morphology and physiology. The nature and degree of the future response of the agricultural ecosystem to the decreasing or increasing UV-B radiation in the background of climate change and ozone dynamics are still unclear. In this regard, this review aims to elucidate the effects of enhanced UV-B radiation reaching the earth's surface due to the depletion of the ozone layer on plants' physiology and the performance of major cereals.
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Affiliation(s)
- Waqas Liaqat
- Department of Field Crops, Faculty of Agriculture, Institute of Natural and Applied Sciences, Çukurova University, 01330 Adana, Turkey
| | - Muhammad Tanveer Altaf
- Faculty of Agricultural Sciences and Technology, Department of Plant Protection, Sivas University of Science and Technology, 58140 Sivas, Turkey
| | - Celaleddin Barutçular
- Department of Field Crops, Faculty of Agriculture, Institute of Natural and Applied Sciences, Çukurova University, 01330 Adana, Turkey
| | - Hira Nawaz
- Department of Plant Protection, Faculty of Agriculture, Institute of Natural and Applied Sciences, Çukurova University, 01330 Adana, Turkey
| | - Izhar Ullah
- Department of Horticulture, Faculty of Agriculture, Ondokuz Mayis University, Samsun, Turkey
| | - Abdul Basit
- Department of Horticultural Science, Kyungpook National University, Daegu, 41566 South Korea
| | - Heba I. Mohamed
- Department of Biological and Geological Sciences, Faculty of Education, Ain Shams University, Cairo, 11341 Egypt
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6
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The Role of Reactive Oxygen Species in Plant Response to Radiation. Int J Mol Sci 2023; 24:ijms24043346. [PMID: 36834758 PMCID: PMC9968129 DOI: 10.3390/ijms24043346] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023] Open
Abstract
Radiation is widespread in nature, including ultraviolet radiation from the sun, cosmic radiation and radiation emitted by natural radionuclides. Over the years, the increasing industrialization of human beings has brought about more radiation, such as enhanced UV-B radiation due to ground ozone decay, and the emission and contamination of nuclear waste due to the increasing nuclear power plants and radioactive material industry. With additional radiation reaching plants, both negative effects including damage to cell membranes, reduction of photosynthetic rate and premature aging and benefits such as growth promotion and stress resistance enhancement have been observed. ROS (Reactive oxygen species) are reactive oxidants in plant cells, including hydrogen peroxide (H2O2), superoxide anions (O2•-) and hydroxide anion radicals (·OH), which may stimulate the antioxidant system of plants and act as signaling molecules to regulate downstream reactions. A number of studies have observed the change of ROS in plant cells under radiation, and new technology such as RNA-seq has molecularly revealed the regulation of radiative biological effects by ROS. This review summarized recent progress on the role of ROS in plant response to radiations including UV, ion beam and plasma, and may help to reveal the mechanisms of plant responses to radiation.
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7
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Chu R, Zhang QH, Wei YZ. Effect of enhanced UV-B radiation on growth and photosynthetic physiology of Iris tectorum maxim. PHOTOSYNTHESIS RESEARCH 2022; 153:177-189. [PMID: 35834037 DOI: 10.1007/s11120-022-00933-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Iris tectorum Maxim. is an important plant that plays a very crucial role in the ecological welfare of wetlands. In this study, the effects of different intensities of UV-B radiation on the growth, photosynthetic pigment content, chlorophyll fluorescence characteristics, chloroplast ultrastructure, and gas exchange parameters of Iris tectorum Maxim. were studied. The results showed that enhanced UV-B radiation had a significant influence on the above-mentioned parameters of iris. Compared with the control, enhanced UV-B radiation caused certain damage to the leaf appearance. With the increasing intensity of radiation, the apparent damage degree became more serious. Enhanced UV-B radiation significantly decreased leaf chlorophyll contents, and the effect accumulated with the exposure time. Enhanced UV-B radiation increased Fo, significantly increased the non-photochemical quenching coefficient NPQ, reduced PSII and Qp, and significantly decreased the Fm, Fv/Fm, and Fv/Fo in leaves. The effect of UV-B radiation on PSII destruction of Iris tectorum Maxim. increased as the radiation intensity increased and the exposure time prolonged. The chloroplast structure was damaged under the enhanced UV-B radiation. More specifically, thylakoid lamellae were distorted, swelling and even blurred, and a large number of starch granules appeared. The effect of the high intensity of radiation on chloroplast ultrastructure was greater than that of lower intensity. Enhanced UV-B radiation reduced significantly the net photosynthetic rate, stomatal conductance, and transpiration rate, and the degree of degradation increased with the increasing irradiation intensity. However, the intercellular CO2 content increased, which suggests that the main reason for the decrease of photosynthetic rate was the non-stomatal factors.
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Affiliation(s)
- Run Chu
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China.
| | - Qin-Hu Zhang
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yu-Zhen Wei
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China
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8
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Williams TB, Dodd IC, Sobeih WY, Paul ND. Ultraviolet radiation causes leaf warming due to partial stomatal closure. HORTICULTURE RESEARCH 2022; 9:uhab066. [PMID: 35043163 PMCID: PMC8944299 DOI: 10.1093/hr/uhab066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
Variation in solar ultraviolet radiation induces a wide-range of plant responses from the cellular to whole-plant scale. We demonstrate here for the first time that partial stomatal closure caused by ultraviolet radiation exposure results in significant increases in leaf temperature. Significant leaf warming in response to ultraviolet radiation was consistent in tomato (Solanum lycopersicum L.) across different experimental approaches. In field experiments where solar ultraviolet radiation was attenuated using filters, exposure to ultraviolet radiation significantly decreased stomatal conductance and increased leaf temperature by up to 1.5°C. Using fluorescent lamps to provide ultraviolet radiation treatments, smaller but significant increases in leaf temperature due to decreases in stomatal conductance occurred in both multi-day controlled environment growth room experiments and short-term (< 2 hours) climate cabinet irradiance response experiments. We show that leaf warming due to partial stomatal closure is independent of any direct warming effects of ultraviolet radiation manipulations. We discuss the implications of ultraviolet radiation-induced warming both for horticultural crop production and understanding broader plant responses to ultraviolet radiation.
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Affiliation(s)
- Tom B Williams
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - Ian C Dodd
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - Wagdy Y Sobeih
- Arid Agritec Ltd. Gordon Manley Building, Lancaster Environmental Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - Nigel D Paul
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
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9
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Piccini C, Cai G, Dias MC, Araújo M, Parri S, Romi M, Faleri C, Cantini C. Olive Varieties under UV-B Stress Show Distinct Responses in Terms of Antioxidant Machinery and Isoform/Activity of RubisCO. Int J Mol Sci 2021; 22:ijms222011214. [PMID: 34681874 PMCID: PMC8538740 DOI: 10.3390/ijms222011214] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/07/2021] [Accepted: 10/16/2021] [Indexed: 01/27/2023] Open
Abstract
In recent decades, atmospheric pollution led to a progressive reduction of the ozone layer with a consequent increase in UV-B radiation. Despite the high adaptation of olive trees to the Mediterranean environment, the progressive increase of UV-B radiation is a risk factor for olive tree cultivation. It is therefore necessary to understand how high levels of UV-B radiation affect olive plants and to identify olive varieties which are better adapted. In this study we analyzed two Italian olive varieties subjected to chronic UV-B stress. We focused on the effects of UV-B radiation on RubisCO, in terms of quantity, enzymatic activity and isoform composition. In addition, we also analyzed changes in the activity of antioxidant enzymes (SOD, CAT, GPox) to get a comprehensive picture of the antioxidant system. We also evaluated the effects of UV-B on the enzyme sucrose synthase. The overall damage at biochemical level was also assessed by analyzing changes in Hsp70, a protein triggered under stress conditions. The results of this work indicate that the varieties (Giarraffa and Olivastra Seggianese) differ significantly in the use of specific antioxidant defense systems, as well as in the activity and isoform composition of RubisCO. Combined with a different use of sucrose synthase, the overall picture shows that Giarraffa optimized the use of GPox and opted for a targeted choice of RubisCO isoforms, in addition to managing the content of sucrose synthase, thereby saving energy during critical stress points.
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Affiliation(s)
- Chiara Piccini
- Department of Life Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; (C.P.); (S.P.); (M.R.); (C.F.)
- Institute for BioEconomy, National Research Council of Italy, 58022 Follonica, Italy;
| | - Giampiero Cai
- Department of Life Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; (C.P.); (S.P.); (M.R.); (C.F.)
- Correspondence: ; Tel.: +39-057-723-2392; Fax: +39-057-723-2861
| | - Maria Celeste Dias
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (M.C.D.); (M.A.)
| | - Márcia Araújo
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; (M.C.D.); (M.A.)
- Department of Biology, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007 Porto, Portugal
- CITAB, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
| | - Sara Parri
- Department of Life Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; (C.P.); (S.P.); (M.R.); (C.F.)
| | - Marco Romi
- Department of Life Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; (C.P.); (S.P.); (M.R.); (C.F.)
| | - Claudia Faleri
- Department of Life Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy; (C.P.); (S.P.); (M.R.); (C.F.)
| | - Claudio Cantini
- Institute for BioEconomy, National Research Council of Italy, 58022 Follonica, Italy;
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10
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Ozgur R, Uzilday B, Yalcinkaya T, Akyol TY, Yildirim H, Turkan I. Differential responses of the scavenging systems for reactive oxygen species (ROS) and reactive carbonyl species (RCS) to UV-B irradiation in Arabidopsis thaliana and its high altitude perennial relative Arabis alpina. Photochem Photobiol Sci 2021; 20:889-901. [PMID: 34159569 DOI: 10.1007/s43630-021-00067-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 06/16/2021] [Indexed: 12/01/2022]
Abstract
The present work aimed to compare antioxidant response and lipid peroxide detoxification capacity of an arctic-alpine species Arabis alpina to its close relative model species Arabidopsis thaliana under acute short duration (3 h and 6 h) UV-B stress (4.6 and 8.2 W/m2). After 3 and 6 h exposure to UV-B, A. alpina showed lower lipid peroxidation and H2O2 accumulation when compared to A. thaliana. Moreover, Fv/Fm value of A. thaliana dropped to 0.70, while A. alpina dropped to 0.75 indicating better protection of PSII in this species. For elucidation of the antioxidant response, activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), ascorbate peroxidase (APX), glutathione reductase (GR) and dehydroascorbate reductase (DHAR) were measured. SOD induction with 6 h of UV-B was more prominent in A. alpina. Also, A. alpina had higher chloroplastic FeSOD activity when compared to A. thaliana. APX activity was also significantly induced in A. alpina, while its activity decreased at 3 h or did not change at 6 h in A. thaliana. A. alpina was able to maintain constant CAT activity, but drastic decreases were observed in A. thaliana at both time points. Moreover, A. alpina was able to maintain or induce aldehyde dehydrogenase (ALDH), alkenal reductases (AERs) and glutathione-S-transferases (GST) activity, while an opposite trend was observed in A. thaliana. These findings indicate that A. alpina was able to maintain/induce its antioxidant defence and lipid peroxide detoxification conferring better protection against UV-B.
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Affiliation(s)
- Rengin Ozgur
- Faculty of Science, Department of Biology, Ege University, Bornova, 35100, Izmir, Turkey.
| | - Baris Uzilday
- Faculty of Science, Department of Biology, Ege University, Bornova, 35100, Izmir, Turkey
| | - Tolga Yalcinkaya
- Faculty of Science, Department of Biology, Ege University, Bornova, 35100, Izmir, Turkey
| | - Turgut Yigit Akyol
- Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai, 980-8577, Japan.,Department of Molecular Biology and Genetics-Plant Molecular Biology, Aarhus University, Gustav Wieds Vej 10, Aarhus C, 8000, Aarhus, Denmark
| | - Hasan Yildirim
- Faculty of Science, Department of Biology, Ege University, Bornova, 35100, Izmir, Turkey
| | - Ismail Turkan
- Faculty of Science, Department of Biology, Ege University, Bornova, 35100, Izmir, Turkey.
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11
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Bernado WDP, Rakocevic M, Santos AR, Ruas KF, Baroni DF, Abraham AC, Pireda S, Oliveira DDS, Cunha MD, Ramalho JC, Campostrini E, Rodrigues WP. Biomass and Leaf Acclimations to Ultraviolet Solar Radiation in Juvenile Plants of Coffea arabica and C. canephora. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10040640. [PMID: 33800618 PMCID: PMC8065693 DOI: 10.3390/plants10040640] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/12/2021] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
Despite the negative impacts of increased ultraviolet radiation intensity on plants, these organisms continue to grow and produce under the increased environmental UV levels. We hypothesized that ambient UV intensity can generate acclimations in plant growth, leaf morphology, and photochemical functioning in modern genotypes of Coffea arabica and C. canephora. Coffee plants were cultivated for ca. six months in a mini greenhouse under either near ambient (UVam) or reduced (UVre) ultraviolet regimes. At the plant scale, C. canephora was substantially more impacted by UVam when compared to C. arabica, investing more carbon in all juvenile plant components than under UVre. When subjected to UVam, both species showed anatomic adjustments at the leaf scale, such as increases in stomatal density in C. canephora, at the abaxial and adaxial cuticles in both species, and abaxial epidermal thickening in C. arabica, although without apparent impact on the thickness of palisade and spongy parenchyma. Surprisingly, C. arabica showed more efficient energy dissipation mechanism under UVam than C. canephora. UVam promoted elevated protective carotenoid content and a greater use of energy through photochemistry in both species, as reflected in the photochemical quenching increases. This was associated with an altered chlorophyll a/b ratio (significantly only in C. arabica) that likely promoted a greater capability to light energy capture. Therefore, UV levels promoted different modifications between the two Coffea sp. regarding plant biomass production and leaf morphology, including a few photochemical differences between species, suggesting that modifications at plant and leaf scale acted as an acclimation response to actual UV intensity.
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Affiliation(s)
- Wallace de Paula Bernado
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Miroslava Rakocevic
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Anne Reis Santos
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Katherine Fraga Ruas
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Danilo Força Baroni
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Ana Cabrera Abraham
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Saulo Pireda
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense–Darcy Ribeiro, Campos dos Goytacazes, 28013-602 RJ Rio de Janeiro, Brazil; (S.P.); (D.d.S.O.); (M.D.C.)
| | - Dhiego da Silva Oliveira
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense–Darcy Ribeiro, Campos dos Goytacazes, 28013-602 RJ Rio de Janeiro, Brazil; (S.P.); (D.d.S.O.); (M.D.C.)
| | - Maura Da Cunha
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense–Darcy Ribeiro, Campos dos Goytacazes, 28013-602 RJ Rio de Janeiro, Brazil; (S.P.); (D.d.S.O.); (M.D.C.)
| | - José Cochicho Ramalho
- PlantStress and Biodiversity Lab., Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa (ULisboa), Av. República, 2784-505 Oeiras, Portugal; or
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), 2829-516 Caparica, Portugal
| | - Eliemar Campostrini
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
| | - Weverton Pereira Rodrigues
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, 28013-602 Rio de Janeiro, Brazil; (W.d.P.B.); (A.R.S.); (K.F.R.); (D.F.B.); (A.C.A.)
- Centro de Ciências Agrárias, Naturais e Letras, Universidade Estadual da Região Tocantina do Maranhão, Avenida Brejo do Pinto, S/N, 65975-000 Maranhão, Brazil
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12
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UV-B Radiation Affects Photosynthesis-Related Processes of Two Italian Olea europaea (L.) Varieties Differently. PLANTS 2020; 9:plants9121712. [PMID: 33291829 PMCID: PMC7762067 DOI: 10.3390/plants9121712] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 12/20/2022]
Abstract
Given the economical importance of the olive tree it is essential to study its responses to stress agents such as excessive UV-B radiation, to understand the defense mechanisms and to identify the varieties that are able to cope with it. In the light of the analysis carried out in this study, we argue that UV-B radiation represents a dangerous source of stress for the olive tree, especially in the current increasingly changing environmental conditions. Both the varieties considered (Giarraffa and Olivastra Seggianese), although resistant to the strong treatment to which they were exposed, showed, albeit in different ways and at different times, evident effects. The two varieties have different response times and the Giarraffa variety seems better suited to prolonged UV-B stress, possible due to a more efficient and quick activation of the antioxidant response (e.g., flavonoids use to counteract reactive oxygen species) and because of its capacity to maintain the photosynthetic efficiency as well as a relatively higher content of mannitol. Moreover, pigments reduction after a long period of UV-B exposure can also be an adaptation mechanism triggered by Giarraffa to reduce energy absorption under UV-B stress. Olivastra Seggianese seems less suited to overcome UV-B stress for a long period (e.g., higher reduction of Fv/Fm) and has a higher requirement for sugars (e.g., glucose) possible to counteract stress and to restore energy.
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Xie L, Solhaug KA, Song Y, Johnsen B, Olsen JE, Tollefsen KE. Effects of artificial ultraviolet B radiation on the macrophyte Lemna minor: a conceptual study for toxicity pathway characterization. PLANTA 2020; 252:86. [PMID: 33057834 PMCID: PMC7560917 DOI: 10.1007/s00425-020-03482-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
UVB radiation caused irradiance-dependent and target-specific responses in non-UVB acclimated Lemna minor. Conceptual toxicity pathways were developed to propose causal relationships between UVB-mediated effects at multiple levels of biological organisation. Macrophytes inhabit waterways around the world and are used in hydroponics or aquaponics for different purposes such as feed and wastewater treatment and are thus exposed to elevated levels of UVB from natural and artificial sources. Although high UVB levels are harmful to macrophytes, mechanistic understanding of irradiance-dependent effects and associated modes of action in non-UVB acclimated plants still remains low. The present study was conducted to characterise the irradiance-dependent mechanisms of UVB leading to growth inhibition in Lemna minor as an aquatic macrophyte model. The L. minor were continuously exposed to UVB (0.008-4.2 W m-2) and constant UVA (4 W m-2) and photosynthetically active radiation, PAR (80 µmol m-2 s-1) for 7 days. A suite of bioassays was deployed to assess effects on oxidative stress, photosynthesis, DNA damage, and transcription of antioxidant biosynthesis, DNA repair, programmed cell death, pigment metabolism and respiration. The results showed that UVB triggered both irradiance-dependent and target-specific effects at multiple levels of biological organization, whereas exposure to UVA alone did not cause any effects. Inhibition of photosystem II and induction of carotenoids were observed at 0.23 W m-2, whereas growth inhibition, excessive reactive oxygen species, lipid peroxidation, cyclobutane pyrimidine dimer formation, mitochondrial membrane potential reduction and chlorophyll depletion were observed at 0.5-1 W m-2. Relationships between responses at different levels of biological organization were used to establish a putative network of toxicity pathways to improve our understanding of UVB effects in aquatic macrophytes under continuous UVB exposures. Additional studies under natural illuminations were proposed to assess whether these putative toxicity pathways may also be relevant for more ecologically relevant exposure scenarios.
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Affiliation(s)
- Li Xie
- Section of Ecotoxicology and Risk Assessment, Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, 0349, Oslo, Norway
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway
| | - Knut Asbjørn Solhaug
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432, Ås, Norway
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway
| | - You Song
- Section of Ecotoxicology and Risk Assessment, Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, 0349, Oslo, Norway
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway
| | - Bjørn Johnsen
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway
- Norwegian Radiation and Nuclear Safety Authority (DSA), 1361, Østerås, Norway
| | - Jorunn Elisabeth Olsen
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway
- Faculty of Biosciences, Institute of Plant Sciences, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432, Ås, Norway
| | - Knut Erik Tollefsen
- Section of Ecotoxicology and Risk Assessment, Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, 0349, Oslo, Norway.
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432, Ås, Norway.
- Centre for Environmental Radioactivity, Norwegian University of Life Sciences (NMBU), Post Box 5003, 1432, Ås, Norway.
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Dzomeku BM, Wald JP, Wünsche JN, Nohr D, Biesalski HK. Climate Change Enhanced Carotenoid Pro-Vitamin A Levels of Selected Plantain Cultivars. PLANTS 2020; 9:plants9040541. [PMID: 32331213 PMCID: PMC7238263 DOI: 10.3390/plants9040541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/18/2020] [Accepted: 03/18/2020] [Indexed: 11/16/2022]
Abstract
Diet diversification and the exploitation of traditional, micronutrient-rich germplasm of staple crops are generally regarded as sustainable and low-cost approaches to increase the micronutrient intake of resource-poor people. Sun's UV index was collected daily throughout the year. The study assessed the seasonality of provitamin A carotenoids in three plantain cultivars in response to climatic condition. Fruits were harvested at three maturities and freeze-dried before analysis. The results showed that there were high levels of the sun's UV-B radiations throughout the year with the highest occurring from November to May when the area experienced clear skies with minimal cloud cover. These high levels of the sun's UV-B index occurred between 9.00 h GMT and 17.00 h GMT. The study also showed that α-carotene content increased with maturity in "Apantu" during the rainy seasons ranging from 95 to 172 μg/100 g of dry pulp. Similar trends were observed during the dry season with a range of 28 to 489 μg/100 g. The α-carotene contents were very high in the periods of high sun's UV-B radiations compared to the periods of low sun's UV-B radiations. The α-carotene levels in the giant French plantains showed similar trends. Intermediate French "Oniaba" and False Horn "Apantu" plantain cultivar showed the highest content of β-carotene during the dry season. The high provitamin A carotenoid levels in the cultivars coincided with the high levels of the sun's UV index.
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Affiliation(s)
- Beloved Mensah Dzomeku
- CSIR-Crops Research Institute, P.O. Box 3785, Kumasi AK000-AK911, Ghana
- Correspondence: ; Tel.: +233-24-4763722
| | - Julian P. Wald
- Institute of Nutrition Science (140a), University of Hohenheim, Garben strasse 30, D-70593 Stuttgart, Germany; (J.P.W.); (D.N.); (H.K.B.)
| | - Jens Norbert Wünsche
- Department of Crop Science, Crop Physiology of Specialty Crops (340f), University of Hohenheim, 70599 Stuttgart, Germany;
| | - Donatus Nohr
- Institute of Nutrition Science (140a), University of Hohenheim, Garben strasse 30, D-70593 Stuttgart, Germany; (J.P.W.); (D.N.); (H.K.B.)
| | - Hans K. Biesalski
- Institute of Nutrition Science (140a), University of Hohenheim, Garben strasse 30, D-70593 Stuttgart, Germany; (J.P.W.); (D.N.); (H.K.B.)
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15
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Sun YQ, Zhao W, Xu CQ, Xu Y, El-Kassaby YA, De La Torre AR, Mao JF. Genetic Variation Related to High Elevation Adaptation Revealed by Common Garden Experiments in Pinus yunnanensis. Front Genet 2020; 10:1405. [PMID: 32117429 PMCID: PMC7027398 DOI: 10.3389/fgene.2019.01405] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/23/2019] [Indexed: 12/30/2022] Open
Abstract
Local adaptation, adaptation to specialized niches and environmental clines have been extensively reported for forest trees. Investigation of the adaptive genetic variation is crucial for forest resource management and breeding, especially in the context of global climate change. Here, we utilized a Pinus yunnanensis common garden experiments established at high and low elevation sites to assess the differences in growth and survival among populations and between the two common garden sites. The studied traits showed significant variation between the two test sites and among populations, suggesting adaptive divergence. To detect genetic variation related to environment, we captured 103,608 high quality SNPs based on RNA sequencing, and used them to assess the genetic diversity and population structure. We identified 321 outlier SNPs from 131 genes showing significant divergence in allelic frequency between survival populations of two sites. Functional categories associated with adaptation to high elevation were found to be related to flavonoid biosynthesis, response to UV, DNA repair, response to reactive oxygen species, and membrane lipid metabolic process. Further investigation of the outlier genes showed overrepresentation of the flavonoid biosynthesis pathway, suggesting that this pathway may play a key role in P. yunnanensis adaptation to high elevation environments. The outlier genes identified, and their variants, provide a basic reference for advanced investigations.
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Affiliation(s)
- Yan-Qiang Sun
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Wei Zhao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Chao-Qun Xu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Yulan Xu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Southwest Forestry University, Kunming, China
| | - Yousry A. El-Kassaby
- Department of Forest and Conservation Sciences, Faculty of Forestry, The University of British Columbia, Vancouver, BC, Canada
| | | | - Jian-Feng Mao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
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16
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Wei Z, Li C, Gao T, Zhang Z, Liang B, Lv Z, Zou Y, Ma F. Melatonin increases the performance of Malus hupehensis after UV-B exposure. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 139:630-641. [PMID: 31039504 DOI: 10.1016/j.plaphy.2019.04.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 05/23/2023]
Abstract
Melatonin, an evolutionarily conserved molecule, is implicated in numerous physiological processes in plants. To explore the potential roles of melatonin in response to UV-B radiation, we examined the influence of exogenous melatonin on Malus hupehensis Rehd. seedlings under two levels of UV-B radiation. Under UV-B stress, seedlings showed significant reduction in plant growth, biomass production, and root system development. However, 1 μM melatonin solution markedly alleviated these effects, especially at the higher dosage of UV-B radiation. The inhibitory effects of UV-B radiation on photosynthetic parameters, chlorophyll fluorescence parameters, stomatal apertures, chlorophyll levels and leaf membrane damages were also markedly alleviated with melatonin application. Melatonin treatment was also associated with higher activity and expression of genes encoding antioxidant enzymes (ascorbate peroxidase, catalase and peroxidase) and greater decline of H2O2 content in leaves exposed to UV-B. Moreover, exogenous melatonin treatment and UV-B stress increased the concentration of endogenous melatonin. The content of several phenolic compounds, including chlorogenic acid, phloridzin and quercetin-3-galactoside, also increased under UV-B stress, and these were further elevated significantly with melatonin addition. This study provides insight into the role(s) of endogenous melatonin in response to UV-B stress, and will facilitate application of exogenous melatonin in agriculture.
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Affiliation(s)
- Zhiwei Wei
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Tengteng Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Zhijun Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Bowen Liang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Zuosen Lv
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Yangjun Zou
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Cui J, Xia W, Wei S, Zhang M, Wang W, Zeng D, Liu M, Sun Y, Lu W. Photosynthetic Performance of Rice Seedlings Originated from Seeds Exposed to Spaceflight Conditions. Photochem Photobiol 2019; 95:1205-1212. [PMID: 30864196 DOI: 10.1111/php.13097] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 03/05/2019] [Indexed: 12/17/2022]
Abstract
The mechanism of the regulation on photosynthesis after spaceflight has not been fully understood. To learn more information about this, we conducted a series of experiments of photosystem, including photosynthetic physiological characteristics (fluorescence parameters, pigment contents), gene expression and proteomic change. We want to examine the response of rice (Oryza sativaDN416), whose seeds were placed in Bio-Radiation Box on the ShiJian-10(SJ-10) recoverable satellite. Our results demonstrated that the photosynthesis capacity of plants after spaceflight declined, compared to ground control plants. Specifically, Fv/Fm is significantly reduced for 7.5%. Chlorophyll content decreased in the three growth stages of rice, trefoil, tillering and mature stages. To further analyze changes under spaceflight environment, quantitative real-time PCR technology and isobaric tags for relative and absolute quantization (iTRAQ) labeling technology were deployed. We found that the gene expression of important subunits of key enzymes and important structures had been decreased after spaceflight. As for the results of changes in proteins, we discovered that the content of proteins related to electron transport and photosynthesis key enzyme declined. Our experiments can provide reference for further research to learn more about the effects of spaceflight on photosynthesis.
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Affiliation(s)
- Jie Cui
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China
| | - Wenyan Xia
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China.,National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
| | - Shiyun Wei
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China.,National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
| | - Meng Zhang
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Wei Wang
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Deyong Zeng
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China.,National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
| | - Mengyao Liu
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China.,National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
| | - Yeqing Sun
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Weihong Lu
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin, China.,Institute of Extreme Environment Nutrition and Protection, Harbin Institute of Technology, Harbin, China.,National and Local Joint Engineering Laboratory for Synthesis, Transformation and Separation of Extreme Environmental Nutrients, Harbin Institute of Technology, Harbin, China
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18
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Mishra MRM, Srivastava RK, Akhtar N. Effect of Nitrogen, Phosphorus and Medium pH to Enhance Alkaloid Production from Catharanthus roseus Cell Suspension Culture. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2019. [DOI: 10.21448/ijsm.559679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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19
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Thomas DT, Puthur JT. Amplification of abiotic stress tolerance potential in rice seedlings with a low dose of UV-B seed priming. FUNCTIONAL PLANT BIOLOGY : FPB 2019; 46:455-466. [PMID: 30940331 DOI: 10.1071/fp18258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/21/2019] [Indexed: 05/22/2023]
Abstract
UV-B radiation is a major abiotic stress factor that adversely affects the growth and productivity of crop plants including rice (Oryza sativa L.). However, on the other hand, lower doses of UV-B radiation applied to seeds can have a priming effect on plants emerging from it. In this study, seeds of O. sativa var. kanchana were primed with UV-B radiation (6 kJ m-2) and were further subjected to NaCl, polyethylene glycol 6000 (PEG) and UV-B stress. The effects of UV-B priming in imparting NaCl, PEG and UV-B stress tolerance to rice seedlings were analysed through various photosynthetic features and antioxidative mechanisms. PSI and PSII activity levels as well as chl a fluorescence were found to be significantly higher in the UV-B primed and unstressed seedlings. When stress (NaCl, PEG and high UV-B) was imposed, increased PSI and PSII activity levels, chl a fluorescence and metabolite accumulation (proline, total phenolics and sugar) as well as nonenzymatic (ascorbate and glutathione) and enzymatic (superoxide dismutase, catalase, ascorbate peroxidase) antioxidants were recorded in UV-B primed and NaCl-stressed plants followed by UV-B primed and UV-B-stressed plants, and primed and PEG-stressed, compared with unprimed and stressed conditions. The results indicate that UV-B priming in rice seedlings effectively enhances the NaCl stress tolerance potential in rice to a greater extent than UV-B and PEG stress tolerance potential. The cost-effectiveness of UV-B seed priming is predominantly clear from the differing tolerance responses of rice seedlings exposed to different stress conditions.
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Affiliation(s)
- Dhanya T Thomas
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, C.U. Campus P.O., Kerala-673635, India
| | - Jos T Puthur
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, C.U. Campus P.O., Kerala-673635, India; and Corresponding author.
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Li H, Li Y, Deng H, Sun X, Wang A, Tang X, Gao Y, Zhang N, Wang L, Yang S, Liu Y, Wang S. Tomato UV-B receptor SlUVR8 mediates plant acclimation to UV-B radiation and enhances fruit chloroplast development via regulating SlGLK2. Sci Rep 2018. [PMID: 29666396 DOI: 10.1016/s41598-018-24309-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023] Open
Abstract
Plants utilize energy from sunlight to perform photosynthesis in chloroplast, an organelle that could be damaged by solar UV radiation. The ultraviolet-B (UV-B) photoreceptor UVR8 is required for UV-B perception and signal transduction. However, little is known about how UVR8 influence chloroplast development under UV-B radiation. Here, we characterized tomato UVR8 gene (SlUVR8) and our results indicated that SlUVR8 facilitate plant acclimation to UV-B stress by orchestrating expression of the UVB-responsive genes (HY5 and CHS) and accumulating UV-absorptive compounds. In addition, we also discovered that SlUVR8 promotes fruit chloroplast development through enhancing accumulation of transcription factor GOLDEN2-LIKE2 (SlGLK2) which determines chloroplast and chlorophyll levels. Furthermore, UV-B radiation could increase expression of SlGLK2 and its target genes in fruits and leaves. SlUVR8 is required for UVB-induced SlGLK2 expression. Together, our work not only identified the conserved functions of SlUVR8 gene in response to UV-B stress, but also uncovered a novel role that SlUVR8 could boost chloroplast development by accumulating SlGLK2 proteins.
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Affiliation(s)
- Huirong Li
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
- CAS Center for Excellence in Molecular Plant Sciences, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Yuxiang Li
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Heng Deng
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Xiaochun Sun
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
- Shaanxi University of Chinese Medicine/Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi Sheng, China
| | - Anquan Wang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xiaofeng Tang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yongfeng Gao
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China
| | - Ning Zhang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Lihuan Wang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Shuzhang Yang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Yongsheng Liu
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Songhu Wang
- CAS Center for Excellence in Molecular Plant Sciences, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China.
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21
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Li H, Li Y, Deng H, Sun X, Wang A, Tang X, Gao Y, Zhang N, Wang L, Yang S, Liu Y, Wang S. Tomato UV-B receptor SlUVR8 mediates plant acclimation to UV-B radiation and enhances fruit chloroplast development via regulating SlGLK2. Sci Rep 2018; 8:6097. [PMID: 29666396 PMCID: PMC5904186 DOI: 10.1038/s41598-018-24309-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 03/27/2018] [Indexed: 12/20/2022] Open
Abstract
Plants utilize energy from sunlight to perform photosynthesis in chloroplast, an organelle that could be damaged by solar UV radiation. The ultraviolet-B (UV-B) photoreceptor UVR8 is required for UV-B perception and signal transduction. However, little is known about how UVR8 influence chloroplast development under UV-B radiation. Here, we characterized tomato UVR8 gene (SlUVR8) and our results indicated that SlUVR8 facilitate plant acclimation to UV-B stress by orchestrating expression of the UVB-responsive genes (HY5 and CHS) and accumulating UV-absorptive compounds. In addition, we also discovered that SlUVR8 promotes fruit chloroplast development through enhancing accumulation of transcription factor GOLDEN2-LIKE2 (SlGLK2) which determines chloroplast and chlorophyll levels. Furthermore, UV-B radiation could increase expression of SlGLK2 and its target genes in fruits and leaves. SlUVR8 is required for UVB-induced SlGLK2 expression. Together, our work not only identified the conserved functions of SlUVR8 gene in response to UV-B stress, but also uncovered a novel role that SlUVR8 could boost chloroplast development by accumulating SlGLK2 proteins.
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Affiliation(s)
- Huirong Li
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.,CAS Center for Excellence in Molecular Plant Sciences, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Yuxiang Li
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Heng Deng
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Xiaochun Sun
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.,Shaanxi University of Chinese Medicine/Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi Sheng, China
| | - Anquan Wang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xiaofeng Tang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yongfeng Gao
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.,School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China
| | - Ning Zhang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Lihuan Wang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Shuzhang Yang
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China
| | - Yongsheng Liu
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China. .,School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Songhu Wang
- CAS Center for Excellence in Molecular Plant Sciences, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China.
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22
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Celeste Dias M, Pinto DCGA, Correia C, Moutinho-Pereira J, Oliveira H, Freitas H, Silva AMS, Santos C. UV-B radiation modulates physiology and lipophilic metabolite profile in Olea europaea. JOURNAL OF PLANT PHYSIOLOGY 2018; 222:39-50. [PMID: 29407548 DOI: 10.1016/j.jplph.2018.01.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 12/27/2017] [Accepted: 01/02/2018] [Indexed: 05/25/2023]
Abstract
Ultraviolet-B (UV-B) radiation plays an important role in plant photomorphogenesis. Whilst the morpho-functional disorders induced by excessive UV irradiation are well-known, it remains unclear how this irradiation modulates the metabolome, and which metabolic shifts improve plants' tolerance to UV-B. In this study, we use an important Mediterranean crop, Olea europaea, to decipher the impacts of enhanced UV-B radiation on the physiological performance and lipophilic metabolite profile. Young olive plants (cv. 'Galega Vulgar') were exposed for five days to UV-B biologically effective doses of 6.5 kJ m-2 d-1 and 12.4 kJ m-2 d-1. Cell cycle/ploidy, photosynthesis and oxidative stress, as well as GC-MS metabolites were assessed. Both UV-B treatments impaired net CO2 assimilation rate, transpiration rate, photosynthetic pigments, and RuBisCO activity, but 12.4 kJ m-2 d-1 also decreased the photochemical quenching (qP) and the effective efficiency of PSII (ΦPSII). UV-B treatments promoted mono/triperpene pathways, while only 12.4 kJ m-2 d-1 increased fatty acids and alkanes, and decreased geranylgeranyl-diphosphate. The interplay between physiology and metabolomics suggests some innate ability of these plants to tolerate moderate UV-B doses (6.5 kJ m-2 d-1). Also their tolerance to higher doses (12.4 kJ m-2 d-1) relies on plants' metabolic adjustments, where the accumulation of specific compounds such as long-chain alkanes, palmitic acid, oleic acid and particularly oleamide (which is described for the first time in olive leaves) play an important protective role. This is the first study demonstrating photosynthetic changes and lipophilic metabolite adjustments in olive leaves under moderate and high UV-B doses.
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Affiliation(s)
- Maria Celeste Dias
- Department of Life Sciences & CFE, Faculty of Sciences and Technologies, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Diana C G A Pinto
- Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Carlos Correia
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, Apt. 1013, 5000-801 Vila Real, Portugal
| | - José Moutinho-Pereira
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, Apt. 1013, 5000-801 Vila Real, Portugal
| | - Helena Oliveira
- Department Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Department of Chemistry & CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Helena Freitas
- Department of Life Sciences & CFE, Faculty of Sciences and Technologies, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Artur M S Silva
- Department of Chemistry & QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Conceição Santos
- Department of Biology, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
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23
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Ge L, Chen L, Mo Q, Zhou G, Meng X, Wang Y. Total phenylethanoid glycosides and magnoloside IafromMagnolia officinalisvar.bilobafruits inhibit ultraviolet B-induced phototoxicity and inflammation through MAPK/NF-κB signaling pathways. RSC Adv 2018. [DOI: 10.1039/c7ra13033c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Magnolia officinalisvar.bilobais used as a traditional medicine in China and as a food additive in the United Kingdom and the European Union.
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Affiliation(s)
- Lanlan Ge
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
| | - Ling Chen
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
| | - Qigui Mo
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
| | - Gao Zhou
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
| | - Xiaoshan Meng
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
| | - Youwei Wang
- Institute of TCM and Natural Products
- School of Pharmaceutical Sciences
- Wuhan University
- Wuhan 430071
- P. R. China
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24
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Zhang X, Tang X, Wang M, Zhang W, Zhou B, Wang Y. ROS and calcium signaling mediated pathways involved in stress responses of the marine microalgae Dunaliella salina to enhanced UV-B radiation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017. [DOI: 10.1016/j.jphotobiol.2017.05.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Mawphlang OIL, Kharshiing EV. Photoreceptor Mediated Plant Growth Responses: Implications for Photoreceptor Engineering toward Improved Performance in Crops. FRONTIERS IN PLANT SCIENCE 2017; 8:1181. [PMID: 28744290 PMCID: PMC5504655 DOI: 10.3389/fpls.2017.01181] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 06/20/2017] [Indexed: 05/18/2023]
Abstract
Rising temperatures during growing seasons coupled with altered precipitation rates presents a challenging task of improving crop productivity for overcoming such altered weather patterns and cater to a growing population. Light is a critical environmental factor that exerts a powerful influence on plant growth and development ranging from seed germination to flowering and fruiting. Higher plants utilize a suite of complex photoreceptor proteins to perceive surrounding red/far-red (phytochromes), blue/UV-A (cryptochromes, phototropins, ZTL/FKF1/LKP2), and UV-B light (UVR8). While genomic studies have also shown that light induces extensive reprogramming of gene expression patterns in plants, molecular genetic studies have shown that manipulation of one or more photoreceptors can result in modification of agronomically beneficial traits. Such information can assist researchers to engineer photoreceptors via genome editing technologies to alter expression or even sensitivity thresholds of native photoreceptors for targeting aspects of plant growth that can confer superior agronomic value to the engineered crops. Here we summarize the agronomically important plant growth processes influenced by photoreceptors in crop species, alongwith the functional interactions between different photoreceptors and phytohormones in regulating these responses. We also discuss the potential utility of synthetic biology approaches in photobiology for improving agronomically beneficial traits of crop plants by engineering designer photoreceptors.
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26
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Song L, Ma Q, Zou Z, Sun K, Yao Y, Tao J, Kaleri NA, Li X. Molecular Link between Leaf Coloration and Gene Expression of Flavonoid and Carotenoid Biosynthesis in Camellia sinensis Cultivar 'Huangjinya'. FRONTIERS IN PLANT SCIENCE 2017; 8:803. [PMID: 28596773 PMCID: PMC5443146 DOI: 10.3389/fpls.2017.00803] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 04/28/2017] [Indexed: 05/18/2023]
Abstract
'Huangjinya' is an excellent albino tea germplasm cultivated in China because of its bright color and high amino acid content. It is light sensitive, with yellow leaves under intense light while green leaves under weak light. As well, the flavonoid and carotenoid levels increased after moderate shading treatment. However, the mechanism underlying this interesting phenomenon remains unclear. In this study, the transcriptome of 'Huangjinya' plants exposed to sunlight and shade were analyzed by high-throughput sequencing followed by de novo assembly. Shading 'Huangjinya' made its leaf color turn green. De novo assembly showed that the transcriptome of 'Huangjinya' leaves comprises of 127,253 unigenes, with an average length of 914 nt. Among the 81,128 functionally annotated unigenes, 207 differentially expressed genes were identified, including 110 up-regulated and 97 down-regulated genes under moderate shading compared to full light. Gene ontology (GO) indicated that the differentially expressed genes are mainly involved in protein and ion binding and oxidoreductase activity. Antioxidation-related pathways, including flavonoid and carotenoid biosynthesis, were highly enriched in these functions. Shading inhibited the expression of flavonoid biosynthesis-associated genes and induced carotenoid biosynthesis-related genes. This would suggest that decreased flavonoid biosynthetic gene expression coincides with increased flavonoids (e.g., catechin) content upon moderate shading, while carotenoid levels and biosynthetic gene expression are positively correlated in 'Huangjinya.' In conclusion, the leaf color changes in 'Huangjinya' are largely determined by the combined effects of flavonoid and carotenoid biosynthesis.
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Affiliation(s)
- Lubin Song
- Tea Research Center, Shandong Institute of PomologyTai'an, China
| | - Qingping Ma
- Tea Research Institute, College of Horticulture, Nanjing Agricultural UniversityNanjing, China
| | - Zhongwei Zou
- Department of Plant Science, University of Manitoba, WinnipegMB, Canada
| | - Kang Sun
- Tea Research Institute, College of Horticulture, Nanjing Agricultural UniversityNanjing, China
| | - Yuantao Yao
- Tea Research Center, Shandong Institute of PomologyTai'an, China
| | - Jihan Tao
- Tea Research Center, Shandong Institute of PomologyTai'an, China
| | - Najeeb A Kaleri
- Tea Research Institute, College of Horticulture, Nanjing Agricultural UniversityNanjing, China
| | - Xinghui Li
- Tea Research Institute, College of Horticulture, Nanjing Agricultural UniversityNanjing, China
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27
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Luengo Escobar A, Alberdi M, Acevedo P, Machado M, Nunes-Nesi A, Inostroza-Blancheteau C, Reyes-Díaz M. Distinct physiological and metabolic reprogramming by highbush blueberry (Vaccinium corymbosum) cultivars revealed during long-term UV-B radiation. PHYSIOLOGIA PLANTARUM 2017; 160:46-64. [PMID: 27943328 DOI: 10.1111/ppl.12536] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 11/04/2016] [Accepted: 11/27/2016] [Indexed: 05/14/2023]
Abstract
Despite the Montreal protocol and the eventual recovery of the ozone layer over Antarctica, there are still concerns about increased levels of ultraviolet-B (UV-B) radiation in the Southern Hemisphere. UV-B induces physiological, biochemical and morphological stress responses in plants, which are species-specific and different even for closely related cultivars. In woody plant species, understanding of long-term mechanisms to cope with UV-B-induced stress is limited. Therefore, a greenhouse UV-B daily course simulation was performed for 21 days with two blueberry cultivars (Legacy and Bluegold) under UV-BBE irradiance doses of 0, 0.07 and 0.19 W m-2 . Morphological changes, photosynthetic performance, antioxidants, lipid peroxidation and metabolic features were evaluated. We found that both cultivars behaved differently under UV-B exposure, with Legacy being a UV-B-resistant cultivar. Interestingly, Legacy used a combined strategy: initially, in the first week of exposure its photoprotective compounds increased, coping with the intake of UV-B radiation (avoidance strategy), and then, increasing its antioxidant capacity. These strategies proved to be UV-B radiation dose dependent. The avoidance strategy is triggered early under high UV-B radiation in Legacy. Moreover, the rapid metabolic reprogramming capacity of this cultivar, in contrast to Bluegold, seems to be the most relevant contribution to its UV-B stress-coping strategy.
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Affiliation(s)
- Ana Luengo Escobar
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, 54-D, Chile
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile
| | - Miren Alberdi
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile
| | - Patricio Acevedo
- Departamento de Física, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile
- Center for Optics and Photonics, Universidad de Concepción, Concepción, 4012, Chile
| | - Mariana Machado
- Max Planck Partner Group at Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa-Minas Gerais, 36570-900, Brazil
| | - Adriano Nunes-Nesi
- Max Planck Partner Group at Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa-Minas Gerais, 36570-900, Brazil
| | - Claudio Inostroza-Blancheteau
- Núcleo de Investigación en Producción Alimentaría, Facultad de Recursos Naturales, Escuela de Agronomía, Universidad Católica de Temuco, Temuco, 56-D, Chile
| | - Marjorie Reyes-Díaz
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile
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28
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Czégény G, Mátai A, Hideg É. UV-B effects on leaves-Oxidative stress and acclimation in controlled environments. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 248:57-63. [PMID: 27181947 DOI: 10.1016/j.plantsci.2016.04.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 04/21/2016] [Accepted: 04/23/2016] [Indexed: 05/14/2023]
Abstract
As the steady decline in the Earth's stratospheric ozone layer and parallel increase in solar ultraviolet-B (UV-B: 280-315nm) has come to an end, the focus of plant UV research has been shifted from regarding UV-B as threatening plant life to recognizing it as a regulatory factor. While UV-B photoreceptor mediated signaling is increasingly understood, the role of UV-B inducible reactive oxygen species is still to be explored. Earlier experiments with high UV-B irradiation doses and isolated thylakoid membranes demonstrated the potential of UV-B to trigger oxidative stress. However, under realistic UV conditions pro-oxidants cannot be reliably traced in more complex biological samples possessing an array of antioxidant defenses. In the absence of direct experimental evidence we must rely on indications and propose hypotheses on how and whether pro-oxidants, such as reactive oxygen species contribute to acclimative responses. Here we briefly review how a balance between pro-oxidants and antioxidants is affected by UV-B in whole plant experiments performed in controlled environments. A working hypothesis is proposed in which the extents of UV-induced peroxidase and superoxide dismutase activations affect the success of acclimation to UV-B.
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Affiliation(s)
- Gyula Czégény
- Department of Plant Biology, University of Pécs, Hungary
| | - Anikó Mátai
- Department of Plant Biology, University of Pécs, Hungary
| | - Éva Hideg
- Department of Plant Biology, University of Pécs, Hungary.
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29
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He Y, Zhan F, Li Y, Xu W, Zu Y, Yue M. Effect of enhanced UV-B radiation on methane emission in a paddy field and rice root exudation of low-molecular-weight organic acids. Photochem Photobiol Sci 2016; 15:735-43. [PMID: 27194164 DOI: 10.1039/c6pp00023a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A local rice variety, "Baijiaolaojing", was grown in a paddy field in the Yuanyang rice terraces under ambient and supplemental levels of ultraviolet-B (UV-B, 280-315 nm) radiation. The effects of enhanced UV-B radiation (5 and 10 kJ m(-2) d(-1)) on methane emissions in the paddy field were evaluated using a closed-chamber gas chromatography-based system, and the contents of low-molecular-weight organic acids (LMWOAs) in root exudates were determined by high-performance liquid chromatography (HPLC). Peaks in methane emissions in the paddy field were detected at 60, 80 and 100 days after rice transplantation. The highest level of cumulative methane emissions occurred at the tillering stage, followed by the jointing-booting and maturity stages. The lowest level was found at the flowering stage. The enhanced UV-B radiation did not change the seasonal variation in methane emissions in the paddy field; however, it induced a significant increase in the flux of methane emissions at the jointing-booting and maturity stages, as well as a significant increase in the cumulative flux of methane emissions throughout the growth period. In addition, the enhanced UV-B radiation caused an increase in the contents of oxalic acid and succinic acid and a decrease in the contents of tartaric acid and malic acid in rice root exudates. Furthermore, a significant positive correlation (r = 0.725, p < 0.01) was found between the content of oxalic acid and the methane emissions in the paddy field. The results indicated that enhanced UV-B radiation promoted methane emissions in the paddy field, which was closely associated with its impact on the exudation of LMWOAs by rice roots.
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Affiliation(s)
- Yongmei He
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi'an 710069, China.
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de Oliveira EM, Schmidt ÉC, Pereira DT, Bouzon ZL, Ouriques LC. Effects of UV-B radiation on germlings of the red macroalga Nemalion helminthoides (Rhodophyta). J Microsc Ultrastruct 2016; 4:85-94. [PMID: 30023214 PMCID: PMC6014211 DOI: 10.1016/j.jmau.2015.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/26/2015] [Accepted: 11/10/2015] [Indexed: 11/11/2022] Open
Abstract
Studies have clearly demonstrated the damaging effects of UV-B exposure on macroalgae, but few have reported the impact of UV-B on spore germination and development at juvenile stages. Therefore, this work aimed to analyze the effects of UV-B radiation on germlings of Nemalion helminthoides at the tetrasporophytic phase. To accomplish this, germlings of N. helminthoides were cultivated in the laboratory and separated into two groups. The control group was exposed onlyto photosynthetic radiation, while the treatment group was exposed to photosynthetic radiation + UV-B for 2 hours during a period of 12 days. Control germlings showed increasing cellular proliferation and accumulation of reserve substances, as well as intense ramification in the last observed stages between 9 days and 12 days of development. Moreover, the chloroplasts presented a typical globular pyrenoid, profusely traversed by thylakoid membranes. Treated germlings, by contrast, showed intracellular damage, such as cell wall thickness, loss of chloroplast organization, changes in mitochondrial cristae, and increasing atrophy of the Golgi bodies. Additionally, changes in developmental patterns were observed, including loss of polarity in the first divisions of carpospores and abnormal stem ramification. The quantification of autofluorescence data coincided with the ultrastructural changes observed in the chloroplasts of cells exposed to UV-B. It can be concluded that exposure to radiation changed the developmental pattern and morphology of the germlings of N. helminthoides.
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Affiliation(s)
- Eliana M de Oliveira
- Post-Graduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil.,Central Laboratory of Electron Microscopy, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Éder C Schmidt
- Post-Graduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Debora T Pereira
- Post-Graduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Zenilda L Bouzon
- Post-Graduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Luciane C Ouriques
- Post-Graduate Program in Cell Biology and Development, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
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Klem K, Holub P, Štroch M, Nezval J, Špunda V, Tříska J, Jansen MAK, Robson TM, Urban O. Ultraviolet and photosynthetically active radiation can both induce photoprotective capacity allowing barley to overcome high radiation stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 93:74-83. [PMID: 25583309 DOI: 10.1016/j.plaphy.2015.01.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 01/06/2015] [Indexed: 05/05/2023]
Abstract
The main objective of this study was to determine the effects of acclimation to ultraviolet (UV) and photosynthetically active radiation (PAR) on photoprotective mechanisms in barley leaves. Barley plants were acclimated for 7 days under three combinations of high or low UV and PAR treatments ([UV-PAR-], [UV-PAR+], [UV+PAR+]). Subsequently, plants were exposed to short-term high radiation stress (HRS; defined by high intensities of PAR - 1000 μmol m(-2) s(-1), UV-A - 10 W m(-2) and UV-B 2 W m(-2) for 4 h), to test their photoprotective capacity. The barley variety sensitive to photooxidative stress (Barke) had low constitutive flavonoid content compared to the resistant variety (Bonus) under low UV and PAR intensities. The accumulation of lutonarin and 3-feruloylquinic acid, but not of saponarin, was greatly enhanced by high PAR and further increased by UV exposure. Acclimation of plants to both high UV and PAR intensities also increased the total pool of xanthophyll-cycle pigments (VAZ). Subsequent exposure to HRS revealed that prior acclimation to UV and PAR was able to ameliorate the negative consequences of HRS on photosynthesis. Both total contents of epidermal flavonols and the total pool of VAZ were closely correlated with small reductions in light-saturated CO2 assimilation rate and maximum quantum yield of photosystem II photochemistry caused by HRS. Based on these results, we conclude that growth under high PAR can substantially increase the photoprotective capacity of barley plants compared with plants grown under low PAR. However, additional UV radiation is necessary to fully induce photoprotective mechanisms in the variety Barke. This study demonstrates that UV-exposure can lead to enhanced photoprotective capacity and can contribute to the induction of tolerance to high radiation stress in barley.
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Affiliation(s)
- Karel Klem
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic
| | - Petr Holub
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic
| | - Michal Štroch
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic; University of Ostrava, 30. dubna 22, CZ 70103 Ostrava, Czech Republic
| | - Jakub Nezval
- University of Ostrava, 30. dubna 22, CZ 70103 Ostrava, Czech Republic
| | - Vladimír Špunda
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic; University of Ostrava, 30. dubna 22, CZ 70103 Ostrava, Czech Republic
| | - Jan Tříska
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic
| | - Marcel A K Jansen
- University of Cork, School of Biological, Earth and Environmental Science, Distillery Fields, Cork, Ireland
| | - T Matthew Robson
- University of Helsinki, Department of Biosciences, Plant Biology, P.O. Box 65, 00014 University of Helsinki, Finland
| | - Otmar Urban
- Global Change Research Center AS CR, v.v.i., Bělidla 4a, CZ 60300 Brno, Czech Republic.
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Wang Y, Yu G, Li K, Wu M, Ma J, Xu J, Chen G. Responses of photosynthetic properties and antioxidant enzymes in high-yield rice flag leaves to supplemental UV-B radiation during senescence stage. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:4695-4705. [PMID: 25328096 DOI: 10.1007/s11356-014-3714-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
Despite the increasing occurrence of ultraviolet-B (UV-B) radiation, its molecular mechanism is poorly documented in higher plants compared to other environmental stress. In present study, the influence of supplemental UV-B radiation on photosynthetic performance and antioxidant enzymes in rice (Oryza sativa L.) was investigated. Supplemental UV-B radiation reduced net photosynthetic rate in rice flag leaves during senescence stage. By means of the JIP-test, it was found that the potential of processing light energy through the photosynthetic machinery was slightly inhibited by the increased thermal dissipation. Furthermore, 18 thylakoid membrane protein spots were differentially expressed (5-fold or greater variation compared to the control) in supplemental UV-B-treated rice. These identified proteins were involved in various cellular responses and metabolic processes including photosynthesis, stress defense, Calvin cycle, and others of unknown functions. Taken together, these results suggested that physiological changes that resulted from supplemental UV-B radiation were linked to the light reaction, carbon metabolism, and antioxidant enzymes in rice leaves during senescence stage.
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Affiliation(s)
- Yuwen Wang
- Jiangsu Key Laboratory of Biodiversity and Biotechnology, Life Sciences College, Nanjing Normal University, Nanjing, 210023, China
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Chen H, Feng Y, Wang L, Yonezawa T, Crabbe MJC, Zhang X, Zhong Y. Transcriptome profiling of the UV-B stress response in the desert shrub Lycium ruthenicum. Mol Biol Rep 2014; 42:639-49. [DOI: 10.1007/s11033-014-3809-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/27/2014] [Indexed: 11/25/2022]
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Yang Q, Li Y, Wang L, Zhou Q, Huang X. Effect of lanthanum(III) on the production of ethylene and reactive oxygen species in soybean seedlings exposed to the enhanced ultraviolet-B radiation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 104:152-9. [PMID: 24675444 DOI: 10.1016/j.ecoenv.2014.02.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 02/25/2014] [Accepted: 02/28/2014] [Indexed: 06/03/2023]
Abstract
The enhanced ultraviolet-B (UV-B) radiation caused by ozone depletion may exert deleterious effects on plants. Therefore, studies on the effect of UV-B radiation on plants, as well as studies on the methods for alleviating the deleterious effects by chemical control, are of great significance. In this study, after soybean (Glycine max) seedlings were exposed to UV-B radiation (10.2 and 13.8kJ m(-2)day(-1)) for 5 days and the followed 6 days of restoration, respectively, the effects of 20mg L(-1) lanthanum (III) [La(III)] on leaf phenotype, photosynthetic rate, and production of ethylene and reactive oxygen species (ROS) were investigated. The results indicated that the exposure to 10.2 and 13.8kJ m(-2)day(-1) UV-B radiation could cause injury to the leaf phenotype, and lead to the decrease in the content of chlorophyll and the net photosynthetic rate, and the increase in the contents of ROS, ethylene and 1-aminocyclopropanecarboxylic acid, and 1-aminocyclopropanecarboxylic acid synthase activity in soybean seedlings. Following the withdrawal of the enhanced UV-B radiation, the above mentioned parameters gradually recovered, and the recovery of soybean seedlings exposed to 10.2kJ m(-2)day(-1) UV-B radiation was faster than those in soybean seedlings exposed to 13.8kJ m(-2)day(-1) UV-B radiation. The leaf injury and the changes in the above indices that were induced by the enhanced UV-B radiation, especially at 10.2kJ m(-2)day(-1), were alleviated after the pretreatment of soybean seedlings with 20mg L(-1) La(III). The results of the correlation analysis demonstrated that the injury to the leaf phenotype and the decrease in the photosynthetic rate of soybean seedlings were correlated with the increase in the ROS content that was induced by ethylene in soybean seedlings. The pretreatment with 20mg L(-1) La(III) alleviated the injury caused by the enhanced UV-B radiation through the regulation of the ROS production.
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Affiliation(s)
- Qing Yang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yueli Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Lihong Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Qing Zhou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xiaohua Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
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Zhang JJ, Li XQ, Sun JW, Jin SH. Nitric oxide functions as a signal in ultraviolet-B-induced baicalin accumulation in Scutellaria baicalensis suspension cultures. Int J Mol Sci 2014; 15:4733-46. [PMID: 24646913 PMCID: PMC3975422 DOI: 10.3390/ijms15034733] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 02/26/2014] [Accepted: 03/11/2014] [Indexed: 01/05/2023] Open
Abstract
Stress induced by ultraviolet-B (UV-B) irradiation stimulates the accumulation of various secondary metabolites in plants. Nitric oxide (NO) serves as an important secondary messenger in UV-B stress-induced signal transduction pathways. NO can be synthesized in plants by either enzymatic catalysis or an inorganic nitrogen pathway. The effects of UV-B irradiation on the production of baicalin and the associated molecular pathways in plant cells are poorly understood. In this study, nitric oxide synthase (NOS) activity, NO release and the generation of baicalin were investigated in cell suspension cultures of Scutellaria baicalensis exposed to UV-B irradiation. UV-B irradiation significantly increased NOS activity, NO release and baicalin biosynthesis in S. baicalensis cells. Additionally, exogenous NO supplied by the NO donor, sodium nitroprusside (SNP), led to a similar increase in the baicalin content as the UV-B treatment. The NOS inhibitor, Nω-nitro-l-arginine (LNNA), and NO scavenger, 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) partially inhibited UV-B-induced NO release and baicalin accumulation. These results suggest that NO is generated by NOS or NOS-like enzymes and plays an important role in baicalin biosynthesis as part of the defense response of S. baicalensis cells to UV-B irradiation.
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Affiliation(s)
- Jin-Jie Zhang
- School of Marine Science, Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Xue-Qin Li
- Tianmu College, Zhejiang A&F University, Zhuji 311800, Zhejiang, China.
| | - Jun-Wei Sun
- Department of Biology, College of Life Sciences, China Jiliang University, No. 258 Xueyuan Road, Hangzhou 310018, Zhejiang, China.
| | - Song-Heng Jin
- Tianmu College, Zhejiang A&F University, Zhuji 311800, Zhejiang, China.
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Kataria S, Jajoo A, Guruprasad KN. Impact of increasing Ultraviolet-B (UV-B) radiation on photosynthetic processes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 137:55-66. [PMID: 24725638 DOI: 10.1016/j.jphotobiol.2014.02.004] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 02/01/2014] [Accepted: 02/07/2014] [Indexed: 12/14/2022]
Abstract
Increased UV-B radiation on the earth's surface due to depletion of stratospheric ozone layer is one of the changes of current climate-change pattern. The deleterious effects of UV-B radiation on photosynthesis and photosynthetic productivity of plants are reviewed. Perusal of relevant literature reveals that UV-B radiation inflicts damage to the photosynthetic apparatus of green plants at multiple sites. The sites of damage include oxygen evolving complex, D1/D2 reaction center proteins and other components on the donor and acceptor sides of PS II. The radiation inactivates light harvesting complex II and alters gene expression for synthesis of PS II reaction center proteins. Mn cluster of water oxidation complex is the most important primary target of UV-B stress whereas D1 and D2 proteins, quinone molecules and cytochrome b are the subsequent targets of UV-B. In addition, photosynthetic carbon reduction is also sensitive to UV-B radiation which has a direct effect on the activity and content of Rubisco. Some indirect effects of UV-B radiation include changes in photosynthetic pigments, stomatal conductance and leaf and canopy morphology. The failure of protective mechanisms makes PS II further vulnerable to the UV-B radiation. Reactive oxygen species are involved in UV-B induced responses in plants, both as signaling and damaging agents. Exclusion of ambient UV components under field conditions results in the enhancement of the rate of photosynthesis, PS II efficiency and subsequently increases the biomass accumulation and crop yield. It is concluded that predicted future increase in UV-B irradiation will have significant impact on the photosynthetic efficiency and the productivity of higher plants.
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Affiliation(s)
- Sunita Kataria
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India.
| | - Anjana Jajoo
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India
| | - Kadur N Guruprasad
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India
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Huang B, Zhu L, Liu S, Li D, Chen Y, Ma B, Wang Y. In vitro and in vivo evaluation of inhibition activity of lotus (Nelumbo nucifera Gaertn.) leaves against ultraviolet B-induced phototoxicity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 121:1-5. [DOI: 10.1016/j.jphotobiol.2013.02.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 02/07/2013] [Accepted: 02/08/2013] [Indexed: 12/18/2022]
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Hideg E, Jansen MAK, Strid A. UV-B exposure, ROS, and stress: inseparable companions or loosely linked associates? TRENDS IN PLANT SCIENCE 2013; 18:107-15. [PMID: 23084465 DOI: 10.1016/j.tplants.2012.09.003] [Citation(s) in RCA: 338] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 09/12/2012] [Accepted: 09/14/2012] [Indexed: 05/18/2023]
Abstract
Ultraviolet-B (UV-B) radiation has long been perceived as a stressor. However, a conceptual U-turn has taken place, and UV-B damage is now considered rare. We question whether UV-stress and UV-B-induced reactive oxygen species (ROS) are still relevant concepts, and if ROS-mediated signaling contributes to UV-B acclimation. Measurements of antioxidants and of antioxidant genes show that both low and high UV-B doses alter ROS metabolism. Yet, there is no evidence that ROS control gene expression under low UV-B. Instead, expression of antioxidant genes is linked to the UV RESISTANCE LOCUS 8 pathway. We hypothesize that low UV-B doses cause 'eustress' (good stress) and that stimuli-specific signaling pathways pre-dispose plants to a state of low alert that includes activation of antioxidant defenses.
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Affiliation(s)
- Eva Hideg
- Institute of Biology, University of Pécs, Ifjuság u. 6. H-7624 Pécs, Hungary
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