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Light and Phytohormones in Plant Secondary Metabolism

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 1928

Special Issue Editor

Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow 127276, Russia
Interests: cell cycle; plant cell culture; plant molecular biology; photomyxotrophy; phytohormones; ethylene; signaling; plant secondary metabolism; biotechnology; exoproteome

Special Issue Information

Dear Colleagues,

Plants are known to synthesize a great diversity of secondary metabolites that have plenty of biological activities, which makes them extremely important for human health and well-being. In addition, due to their biological properties, secondary metabolites are used in many areas, serving as dietary supplements, pigments, cosmetics, antifeedants, and so on.

Among environmental factors, light is the most important signal influencing plant development and regulating their primary and secondary metabolism through a complex perception of quantity, quality, direction and duration of light. Because the protective role of secondary metabolites in counteracting biotic and abiotic stresses is the leading one, phytohormones – salicylic acid, jasmonates, and ethylene which are indubitable participants in many scenarios of plant protection are usually involved in the regulation of the synthesis of secondary metabolites. Besides, other classical phytohormones also influence this synthesis.

The last three decades have been very successful in gaining new knowledge about the molecular mechanisms of light and phytohormones' action in the control of secondary metabolism. Thus, the forthcoming Special issue of IJMS represents a perfect platform for the discussion of recent developments in this field and is ready to publish original research, reviews and perspectives focused on the Topic: Light and Phytohormones in Plant Secondary Metabolism. Studies of the land plant as well as in vitro plant cell and tissue culture or green algae at the organism, cellular, molecular and omics level are welcome. Works on growing plants or during their postharvest handling are accepted equally.

Dr. Alexander V. Nosov
Guest Editor

Manuscript Submission Information

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Keywords

  • secondary metabolism
  • biosynthetic pathways
  • light intensity
  • light quality
  • receptors
  • phytohormones
  • signaling
  • regulation
  • gene expression

Published Papers (2 papers)

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Research

17 pages, 2183 KiB  
Article
Interactive Effects of Ceftriaxone and Chitosan Immobilization on the Production of Arachidonic Acid by and the Microbiome of the Chlorophyte Lobosphaera sp. IPPAS C-2047
by Svetlana Vasilieva, Alexandr Lukyanov, Christina Antipova, Timofei Grigoriev, Elena Lobakova, Olga Chivkunova, Pavel Scherbakov, Petr Zaytsev, Olga Gorelova, Tatiana Fedorenko, Dmitry Kochkin and Alexei Solovchenko
Int. J. Mol. Sci. 2023, 24(13), 10988; https://doi.org/10.3390/ijms241310988 - 01 Jul 2023
Viewed by 719
Abstract
Pharmaceuticals including antibiotics are among the hazardous micropollutants (HMP) of the environment. Incomplete degradation of the HMP leads to their persistence in water bodies causing a plethora of deleterious effects. Conventional wastewater treatment cannot remove HMP completely and a promising alternative comprises biotechnologies [...] Read more.
Pharmaceuticals including antibiotics are among the hazardous micropollutants (HMP) of the environment. Incomplete degradation of the HMP leads to their persistence in water bodies causing a plethora of deleterious effects. Conventional wastewater treatment cannot remove HMP completely and a promising alternative comprises biotechnologies based on microalgae. The use of immobilized microalgae in environmental biotechnology is advantageous since immobilized cultures allow the recycling of the microalgal cells, support higher cell densities, and boost tolerance of microalgae to stresses including HMP. Here, we report on a comparative study of HMP (exemplified by the antibiotic ceftriaxone, CTA) removal by suspended and chitosan-immobilized cells of Lobosphaera sp. IPPAS C-2047 in flasks and in a column bioreactor. The removal of CTA added in the concentration of 20 mg/L was as high as 65% (in the flasks) or 85% (in the bioreactor). The adsorption on the carrier and abiotic oxidation were the main processes contributing 65–70% to the total CTA removal, while both suspended and immobilized cells took up 25–30% of CTA. Neither the immobilization nor CTA affected the accumulation of arachidonic acid (ARA) by Lobosphaera sp. during bioreactor tests but the subsequent nitrogen deprivation increased ARA accumulation 2.5 and 1.7 times in the suspended and chitosan-immobilized microalgae, respectively. The study of the Lobosphaera sp. microbiome revealed that the immobilization of chitosan rather than the CTA exposure was the main factor displacing the taxonomic composition of the microbiome. The possibility and limitations of the use of chitosan-immobilized Lobosphaera sp. IPPAS C-2047 for HMP removal coupled with the production of valuable long-chain polyunsaturated fatty acids is discussed. Full article
(This article belongs to the Special Issue Light and Phytohormones in Plant Secondary Metabolism)
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15 pages, 3202 KiB  
Article
Investigating the Physiological and Molecular Responses of Solanum lycopersicum hp Mutants to Light of Different Quality for Biotechnological Applications
by Mikhail Vereshchagin, Vladimir Kreslavski, Yury Ivanov, Alexandra Ivanova, Tamara Kumachova, Andrey Ryabchenko, Anatoliy Kosobryukhov, Vladimir Kuznetsov and Pavel Pashkovskiy
Int. J. Mol. Sci. 2023, 24(12), 10149; https://doi.org/10.3390/ijms241210149 - 15 Jun 2023
Cited by 2 | Viewed by 853
Abstract
The effect of the light of different spectral compositions, white fluorescent light (WFL), red light (RL, 660 nm), blue light (BL, 450 nm), green light (GL, 525 nm), and white LED light (WL, 450 + 580 nm), on the physiological parameters of Solanum [...] Read more.
The effect of the light of different spectral compositions, white fluorescent light (WFL), red light (RL, 660 nm), blue light (BL, 450 nm), green light (GL, 525 nm), and white LED light (WL, 450 + 580 nm), on the physiological parameters of Solanum lycopersicum 3005 hp-2 (defective for a DET1 gene) and 4012 hp-1w; 3538 hp-1; 0279 hp-1.2 (defective for a DDB1a gene) photomorphogenetic mutants was studied. The parameters of the primary photochemical processes of photosynthesis, photosynthetic and transpiration rates, the antioxidant capacity of low-molecular weight antioxidants, the content of the total phenolic compounds, including flavonoids, and the expression of the genes involved in light signaling and biosynthesis of secondary metabolites were determined. Under BL, the 3005 hp-2 mutant showed the highest nonenzymatic antioxidant activity, which occurred to a greater extent due to the increase in flavonoid content. At the same time, under BL, the number of secretory trichomes on the surface of the leaves of all mutants increased equally. This suggests the accumulation of flavonoids inside leaf cells rather than in trichomes on the leaf surface. The data obtained indicate the possibility of using the hp-2 mutant for biotechnology to increase its nutritional value by enhancing the content of flavonoids and other antioxidants by modulating the spectral composition of light. Full article
(This article belongs to the Special Issue Light and Phytohormones in Plant Secondary Metabolism)
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