Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017

Photochemical & Photobiological Sciences, Год журнала: 2018, Номер 17(2), С. 127 - 179

Опубликована: Фев. 1, 2018

Язык: Английский

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Plant secondary metabolites synthesis and their regulations under biotic and abiotic constraints

Journal of Plant Biology, Год журнала: 2020, Номер 63(3), С. 203 - 216

Опубликована: Апрель 8, 2020

Язык: Английский

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Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020

Photochemical & Photobiological Sciences, Год журнала: 2021, Номер 20(1), С. 1 - 67

Опубликована: Янв. 1, 2021

Abstract This assessment by the Environmental Effects Assessment Panel (EEAP) of United Nations Environment Programme (UNEP) provides latest scientific update since our most recent comprehensive (Photochemical and Photobiological Sciences, 2019, 18, 595–828). The interactive effects between stratospheric ozone layer, solar ultraviolet (UV) radiation, climate change are presented within framework Montreal Protocol Sustainable Development Goals. We address how these global environmental changes affect atmosphere air quality; human health; terrestrial aquatic ecosystems; biogeochemical cycles; materials used in outdoor construction, energy technologies, fabrics. In many cases, there is a growing influence from seasonality extreme events due to change. Additionally, we assess transmission severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which responsible for COVID-19 pandemic, context linkages with UV radiation Protocol.

Язык: Английский

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Integration of silicon and secondary metabolites in plants: a significant association in stress tolerance

Journal of Experimental Botany, Год журнала: 2020, Номер 71(21), С. 6758 - 6774

Опубликована: Июнь 17, 2020

As sessile organisms, plants are unable to avoid being subjected environmental stresses that negatively affect their growth and productivity. Instead, they utilize various mechanisms at the morphological, physiological, biochemical levels alleviate deleterious effects of such stresses. Amongst these, secondary metabolites produced by represent an important component defense system. Secondary metabolites, namely phenolics, terpenes, nitrogen-containing compounds, have been extensively demonstrated protect against multiple stresses, both biotic (herbivores pathogenic microorganisms) abiotic (e.g. drought, salinity, heavy metals). The regulation metabolism beneficial elements as silicon (Si) is topic. Silicon-mediated alleviation has well documented in numerous plant species. Recently, many studies involvement Si strengthening stress tolerance through modulation metabolism. In this review, we discuss Si-mediated synthesis, metabolism, modification lead enhanced tolerance, with a focus on biochemical, molecular aspects. Whilst involved pathogen resistance via established plants, largely unknown case thus leaving gap our current knowledge.

Язык: Английский

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Polyphenols in Plants: Structure, Biosynthesis, Abiotic Stress Regulation, and Practical Applications (Review)

International Journal of Molecular Sciences, Год журнала: 2023, Номер 24(18), С. 13874 - 13874

Опубликована: Сен. 9, 2023

Phenolic compounds or polyphenols are among the most common of secondary metabolism in plants. Their biosynthesis is characteristic all plant cells and carried out with participation shikimate acetate-malonate pathways. In this case, various structures formed, such as phenylpropanoids, flavonoids, oligomeric polymeric phenolic nature. number already exceeds 10,000. The diversity phenolics affects their biological activity functional role. Most representatives characterized by interaction reactive oxygen species, which manifests itself not only plants but also human body, where they enter through food chains. Having a high activity, successfully used medicines nutritional supplements for health population. accumulation depend on many factors, including physiological-biochemical, molecular-genetic, environmental factors. review, we present latest literature data structure classes compounds, antioxidant biosynthesis, molecular genetic aspects (genes transfactors). Since grow significant changes planet, response to action abiotic factors (light, UV radiation, temperature, heavy metals) at level composition these metabolites, well metabolic regulation, considered. Information given about important necessary components nutrition pharmaceutically valuable substances Proposals promising areas research development field presented.

Язык: Английский

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Nano-Structured Lignin as Green Antioxidant and UV Shielding Ingredient for Sunscreen Applications

Antioxidants, Год журнала: 2021, Номер 10(2), С. 274 - 274

Опубликована: Фев. 10, 2021

Green, biocompatible, and biodegradable antioxidants represent a milestone in cosmetic cosmeceutical applications. Lignin is the most abundant polyphenol nature, recovered as low-cost waste from pulp paper industry biorefinery. This polymer characterized by beneficial physical chemical properties which are improved at nanoscale level due to emergence of antioxidant UV shielding activities. Here we review use lignin nanoparticles applications, focusing on sunscreen antiaging formulations. Advances technology for preparation described highlighting structure activity relationships.

Язык: Английский

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Sustainable extraction bioactive compounds procedures in medicinal plants based on the principles of green analytical chemistry: A review

Microchemical Journal, Год журнала: 2022, Номер 175, С. 107184 - 107184

Опубликована: Янв. 10, 2022

Язык: Английский

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Rational Synthesis of Solid‐State Ultraviolet B Emitting Carbon Dots via Acetic Acid‐Promoted Fractions of sp³ Bonding Strategy

Advanced Materials, Год журнала: 2022, Номер 34(17)

Опубликована: Март 5, 2022

Carbon dots (CDs) have received tremendous attention for their excellent photoluminescence (PL) properties. However, it remains a great challenge to obtain CDs with ultraviolet (UV, 200-400 nm) emission in solid state, which requires strict control of the structure and overcoming aggregation-caused quenching (ACQ). Herein, new sp3 compartmentalization strategy is developed meet these requirements, by employing acetic acid promote fractions bonding during synthesis CDs. It markedly decreases size sp2 conjugating units CDs, shifts PL B (UVB) region (λmax = 308 nm). Moreover, domains are well spatially compartmentalized ACQ effect minimized, enabling high quantum yield state (20.2%, λex 265 narrow bandwidth 24 nm environmental robustness. The solid-state UVB emissive highly desired application photonic devices. Hence, demo light-emitting diodes fabricated plant lighting, leading 29% increase ascorbic content basil. Overall, rational efficient way construct UVB-CDs phosphors wide applications provided.

Язык: Английский

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Interactive effects of changes in UV radiation and climate on terrestrial ecosystems, biogeochemical cycles, and feedbacks to the climate system

Photochemical & Photobiological Sciences, Год журнала: 2023, Номер 22(5), С. 1049 - 1091

Опубликована: Фев. 1, 2023

Terrestrial organisms and ecosystems are being exposed to new rapidly changing combinations of solar UV radiation other environmental factors because ongoing changes in stratospheric ozone climate. In this Quadrennial Assessment, we examine the interactive effects ozone, climate on terrestrial biogeochemical cycles context Montreal Protocol. We specifically assess organisms, agriculture food supply, biodiversity, ecosystem services feedbacks system. Emphasis is placed role extreme events altering exposure potential biodiversity. also address responses plants increased temporal variability radiation, change (e.g. drought, temperature) crops, driving breakdown organic matter from dead plant material (i.e. litter) biocides (pesticides herbicides). Our assessment indicates that interact various ways affect structure function ecosystems, by protecting layer, Protocol continues play a vital maintaining healthy, diverse land sustain life Earth. Furthermore, its Kigali Amendment mitigating some negative consequences limiting emissions greenhouse gases carbon sequestration vegetation pool.

Язык: Английский

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Amino Acids Biostimulants and Protein Hydrolysates in Agricultural Sciences

Plants, Год журнала: 2024, Номер 13(2), С. 210 - 210

Опубликована: Янв. 11, 2024

The effects of different types biostimulants on crops include improving the visual quality final products, stimulating immune systems plants, inducing biosynthesis plant defensive biomolecules, removing heavy metals from contaminated soil, crop performance, reducing leaching, root development and seed germination, tolerance to abiotic biotic stressors, promoting establishment increasing nutrient-use efficiency. Protein hydrolysates are mixtures polypeptides free amino acids resulting enzymatic chemical hydrolysis agro-industrial protein by-products obtained animal or origins, they able alleviate environmental stress effects, improve growth, promote productivity. Amino involve various advantages such as increased yield components, nutrient assimilation tolerance, improved components characteristics. They generally achieved through hydrolysis, with significant capabilities influence synthesis activity some enzymes, gene expression, redox-homeostasis. Increased yield, quality; regulated oxidation-reduction process, photosynthesis, physiological activities; decreased negative toxic components; anti-fungal activities plants just more important benefits application phenols phenolic biostimulants. aim this manuscript is survey impacts acids, hydrolysates, phenols, by presenting case studies successful paradigms in several horticultural agricultural crops.

Язык: Английский

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