Article
Plant Sciences
Viviane Cacefo, Alessandra Ferreira Ribas, Luiz Gonzaga Esteves Vieira
Summary: In response to water deficits, plants accumulate proline to alleviate stress. This study investigated the potential role of exogenous proline application or endogenous overproduction in energy dissipation. Wild-type and transgenic tobacco plants were sprayed with proline and subjected to water deficit, and changes in physiology and biochemistry were analyzed. Exogenous proline reduced the negative effects of water deficit on photosynthesis, especially in transgenic plants. Water deficit increased the expression of proline biosynthesis genes but decreased the expression of catabolism genes in transgenic plants. Proline metabolism may act as a compensatory mechanism for energy dissipation in plants under water deficit.
JOURNAL OF PLANT PHYSIOLOGY
(2023)
Article
Engineering, Environmental
Evren Yildiztugay, Ceyda Ozfidan-konakci, Busra Arikan, Fatma Nur Alp-Turgut, Cagri Guenturk
Summary: The toxicity mechanisms of individual exposure of arsenic (As) and fluoride (F) and their interactions with biochar (BC) are not well understood. This study investigated the defense responses of Lemna minor to combined exposure of As and F under different BC concentrations and found that BC can mitigate the negative effects of As and F on plants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Plant Sciences
Sai Krishna Talla, Bobba Sunil, Duvvarapu Easwar Rao, Pidakala Rajsheel, Deepak Saini, Agepati S. Raghavendra
Summary: We studied the effects of different concentrations of bicarbonate on photosynthesis in Arabidopsis thaliana mesophyll protoplasts. The photosynthetic rate was highest at 1 mM bicarbonate and decreased at higher concentrations. We found that exposure to supra-optimal bicarbonate caused oxidative stress in wild-type protoplasts, but the nadp-mdh mutant had a higher photosynthetic rate and greater sensitivity to high bicarbonate, while the vtc1 mutant had a low photosynthetic rate and no significant inhibition. We concluded that the inhibition of photosynthesis at supra-optimal bicarbonate levels depends on the redox state of mesophyll protoplasts and that the antioxidant enzyme systems in the nadp-mdh mutant may play a role in sustaining high photosynthesis under these conditions.
JOURNAL OF PLANT PHYSIOLOGY
(2023)
Article
Plant Sciences
Cagri Gulenturk, Fatma Nur Alp-Turgut, Busra Arikan, Aysenur Tofan, Ceyda Ozfidan-Konakci, Evren Yildiztugay
Summary: Arsenic is harmful to plants, but treating wheat plants with 1,3-diaminopropane can increase growth rate, improve water content, and protect against oxidative damage caused by arsenic stress.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Plant Sciences
Panagiota Tryfon, Ilektra Sperdouli, Ioannis-Dimosthenis S. Adamakis, Stefanos Mourdikoudis, Catherine Dendrinou-Samara, Michael Moustakas
Summary: The current research explored the behavior of rod-shaped zinc oxide nanoparticles coated with oleylamine (ZnO@OAm NRs) in relation to photosynthetic function and reactive oxygen species (ROS) generation in tomato plants. The results showed that ZnO@OAm NRs reduced the efficiency of PSII photochemistry, while irregularly shaped ZnO@OAm NPs enhanced PSII efficiency. The shape and organic coating of the nanoparticles play a critical role in their mechanism of action and their impact on crop yield in agriculture.
Article
Plant Sciences
Wasifa Hafiz Shah, Aadil Rasool, Sajad Ahmad Padder, Roshan Kumar Singh, Manoj Prasad, Inayatullah Tahir, Reiaz ul Rehman, Khalid Rehman Hakeem
Summary: In this study, it was found that salt stress had deleterious effects on foxtail millet, but foxtail millet showed flexibility in terms of decarboxylation under salt stress conditions. The study also reported that lower doses of selenium alleviated the effects of salinity by enhancing the activity and gene expression of decarboxylation-related enzymes and making the process more energy-efficient.
PLANT GROWTH REGULATION
(2023)
Article
Biochemistry & Molecular Biology
Yuanfen Gao, Xuewu He, Huayang Lv, Hanmei Liu, Yangping Li, Yufeng Hu, Yinghong Liu, Yubi Huang, Junjie Zhang
Summary: This study found that brassinosteroids can improve photosynthesis efficiency in maize by regulating transcription factors ZmNF-YC2 and ZmbHLH157, thus increasing yield.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Plant Sciences
Han Dong, Chaoyi Hu, Chaochao Liu, Jiachun Wang, Yanhong Zhou, Jingquan Yu
Summary: The study reveals that the blue light signal plays a critical role in regulating starch accumulation in tomato chloroplasts through the CRY1a-mediated HY5 transcription factor, affecting starch degradation. HY5 directly binds to the promoters of starch degradation-related genes, activating their transcription and impacting the accumulation of starch and soluble sugars.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Yuting Li, Xin Li, Yujie Li, Shu Zhuang, Yongxiang Feng, Erda Lin, Xue Han
Summary: The study found that the effect of elevated CO2 concentration on the quantum efficiency of PSII photochemistry varies among different winter wheat varieties, with large ear-type and small multiple ear-type showing different responses.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Marine & Freshwater Biology
Charles L. Tilney, Katherine A. Hubbard
Summary: Study evaluated the photobiology and molecular mechanisms of high-light tolerance in K. brevis, showing increased PSII photoinactivation, repair, NPQ, and F-v/F-m under high-light conditions. Phylogeny of ftsH-like genes revealed acquisition during tertiary endosymbiosis, with high-light cultures showing upregulation of thylakoid-associated genes, supporting K. brevis success in the Gulf of Mexico.
Review
Biochemistry & Molecular Biology
Sarvesh Jonwal, Neetu Verma, Alok Krishna Sinha
Summary: This article summarizes the progress made in the field of phosphorylation of photosynthetic proteins and highlights the missing links that need immediate attention.
Article
Environmental Sciences
Takako Masuda, Ondrej Prasil, Virginia E. Villafane, Macarena S. Valinas, Keisuke Inomura, E. Walter Helbling
Summary: This study assessed the impact of global change variables on phytoplankton communities in different sites along the Patagonian coast. The results showed that under future conditions, phytoplankton growth was higher in estuarine areas compared to enclosed bays and open waters, especially among large diatoms. Although an increase in photosynthetic activity was not always observed in the future scenario, the lower photosynthetic electron requirement for carbon fixation suggests a more efficient energy utilization.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Bo Zhuang, Daisuke Seo, Alexey Aleksandrov, Marten H. Vos
Summary: This study investigates the key reactive intermediates in flavoproteins using ultrafast spectroscopic studies, revealing that ultrafast electron transfer from Tyr50 to the excited FAD cofactor in WT BsFNR occurs within approximately 260 fs. The effects of protein environment and relaxations on the spectral properties of radical intermediates are explored, demonstrating the sensitivity of the spectral features of radical anionic FAD to its environment and the nature of counterions formed in the photoproducts. Overall, comprehensive characterizations of important radical intermediates involved in functional processes of flavoproteins are provided.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Plant Sciences
Qingchen Zhang, Yan Li, Weigang Xu, Yu Zhang, Xueli Qi, Yuhui Fang, Chaojun Peng
Summary: This study found that various combinations of maize genes had significant effects on the photosynthesis of Arabidopsis, with PCKM showing the best performance in improving photosynthetic rate and plant dry weight.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Ikram, Ali Haider, Syeda Tayaba Bibi, Anwar Ul-Hamid, Junaid Haider, Iram Shahzadi, Walid Nabgan, Sawaira Moeen, Salamat Ali, Souraya Goumri-Said, Mohammed Benali Kanoun
Summary: In this study, aluminum/starch-doped CaO nanoparticles were synthesized and their influence on the composition, crystal structure, optical characteristics, and morphology of CaO nanoparticles was investigated. The results showed that the doping of Al and St reduced the band gap energy and enhanced the catalytic potential of CaO nanoparticles.
Article
Plant Sciences
Ewa Niewiadomska, Maria Pilarska
Summary: The study found that acclimation to salinity in Mesembryanthemum crystallinum plants is not dependent on the activation of PGR5-PGRL1-dependent CET, but rather associated with leaf senescence and regulation of photosynthesis.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Eugeniusz Parys, Tomasz Krupnik, Ilona Kulak, Kinga Kania, Elzbieta Romanowska
Summary: The study measured the photosynthesis and respiration rates of Cyanidioschizon merolae grown in different light qualities, showing that blue light significantly reduces photosynthesis rates while red light has a smaller impact. Blue light enhances respiration rate, while red light promotes the accumulation of chlorophyll a, zeaxanthin, and beta-carotene.
PHOTOSYNTHESIS RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Urban, Pawel Rogowski, Wioleta Wasilewska-Debowska, Elzbieta Romanowska
Article
Physics, Multidisciplinary
A. Orzechowska, M. Trtilek, E. Niewiadomska
Summary: Thermal imaging was used to study plants' rapid response to excessive light and stomatal movement. Temperature changes over time on leaf blades revealed that Thellungiella salsuginea had a smaller stomata size and higher temperature compared to controls. The study suggests that thermal imaging is useful for analyzing stomatal aperture and monitoring plants' initial response to excess irradiation.
ACTA PHYSICA POLONICA A
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Orzechowska, Martin Trtilek, Krzysztof Michal Tokarz, Renata Szymanska, Ewa Niewiadomska, Piotr Rozpadek, Katarzyna Wator
Summary: A non-destructive thermal imaging method was used to study the stomatal response of salt-treated Arabidopsis thaliana plants to excessive light. The study found that saline-induced impairment in stomatal movement caused reduced stomatal conductance and transpiration rate, and thermal imaging technique can be useful for analyzing stomatal aperture and movement under dynamic environmental conditions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Michal Nosek, Katarzyna Gawronska, Piotr Rozpadek, Marzena Sujkowska-Rybkowska, Zbigniew Miszalski, Andrzej Kornas
Summary: The common ice plant, a facultative CAM plant, showed a high degree of adaptability in photosynthetic metabolism during recovery from salinity stress, with rapid restoration of chloroplast ultrastructure and photosynthetic efficiency. This demonstrates the strong adaptability and flexibility of photosynthetic metabolism in the common ice plant.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Natalia Repkina, Anna Ignatenko, Ekaterina Holoptseva, Zbigniew MiszalskI, Pawel Kaszycki, Vera Talanova
Summary: Exogenous Methyl Jasmonate (MJ) can enhance cold tolerance in wheat by promoting the recovery of photosynthesis, increasing antioxidant enzyme activity, and promoting proline accumulation, thus increasing wheat cold tolerance.
Review
Plant Sciences
Aleksandra Urban, Pawel Rogowski, Wioleta Wasilewska-Debowska, Elzbieta Romanowska
Summary: The photosynthetic capacity of leaves is determined by nitrogen content, which is divided between soluble proteins and thylakoid membrane proteins. In C4 plants, the photosynthetic apparatus is partitioned between mesophyll cells and bundle sheath, with enzymes localized in a cell-specific manner. Changes in light intensity and nitrogen concentration influence nitrates content in leaves, affecting the activity of enzymes involved in nitrogen metabolism and ultimately reducing photosynthetic N use efficiency.
Article
Biochemistry & Molecular Biology
Ewa Surowka, Dariusz Latowski, Michal Dziurka, Magdalena Rys, Anna Maksymowicz, Iwona Zur, Monika Olchawa-Pajor, Christine Desel, Monika Krzewska, Zbigniew Miszalski
Summary: Salt stress caused different responses in Arabidopsis thaliana mutants with altered tocopherol composition, with gamma-TC accumulating plants showing greater flexibility in regulating biocompound levels. Changes in tocopherol composition also affected xanthophyll cycle and metabolite levels under salt stress, suggesting distinct metabolic pathways regulated by alpha- and gamma-tocopherol.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Maria Pilarska, Dorothea Bartels, Ewa Niewiadomska
Summary: This research investigated differences in the regulation of NOX-dependent signalling under salt stress between the halophyte Eutrema salsugineum and the glycophyte Arabidopsis thaliana. The study revealed distinct expression patterns of NOX genes and differences in NOX activity between the two plants under salinity, implicating modified regulation possibly through ABA- and/or ethylene-dependent pathways in the halophyte.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Monika Kula-Maximenko, Ewa Niewiadomska, Anna Maksymowicz, Agnieszka Ostrowska, Jana Oklestkova, Ales Pencik, Anna Janeczko
Summary: The study found that blue/red light had a negative effect on PSII, while far red light combined with blue/red light had a negative impact on PSI. The growth and morphological parameters of plants under different lighting conditions were only partially correlated with photosynthetic efficiency.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Pawel Rogowski, Aleksandra Urban, Elzbieta Romanowska
Summary: For the first time, the Michaelis-Menten model was extended to describe the kinetics of photosystem I complexes using light, demonstrating that the affinity of light to PSI complex depends on LHCII antennas. The study also revealed that far red light can increase the energy gain at PSI reaction centers, and redistribution of excitation energy is not only via LHCII migration but also through association of photosystems in megacomplexes.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2021)
Article
Plant Sciences
Aleksandra Urban, Pawel Rogowski, Elzbieta Romanowska
Summary: This study investigates the influence of PTOX activity on the regulation of cyclic electron transport (CET) pathways and ATP production in chloroplasts. The results demonstrate differential responses of CET and PTOX regulation to environmental changes and provide insights into the adjustment of ATP content in C3 and C4 metabolism. The study also reveals the involvement of NDH-CET pathway in maize chloroplasts and the dominance of PGR5/PGRL1 proteins in pea chloroplasts.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Biochemistry & Molecular Biology
Rogowski Pawe, Urban Aleksandra, Romanowska Elzbieta
Summary: This study examined the enzymatic kinetics of photosystem II (PSII) in maize mesophyll chloroplasts using the artificial electron acceptor 2,6-dichloro-1,4-benzoquinone (DCBQ) as a substrate. The study found that DCBQ can act as both an electron acceptor and an inhibitor for PSII, and its concentration affects the activity and affinity of PSII. The kinetic parameters of PSII varied based on light intensity, indicating changes in thylakoid stacking and electron transport.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2023)
Review
Plant Sciences
Elzbieta Romanowska, Wioleta Wasilewska-Debowska
Summary: Plants experience different light intensities and qualities in their environment, and they have evolved mechanisms to adapt to these conditions. In C4 plants, light intensity is a major limiting factor for photosynthesis. Differences in light quality and intensity have a profound impact on C4 photosynthesis.
ACTA SOCIETATIS BOTANICORUM POLONIAE
(2022)