Article
Plant Sciences
Leonardo Basso, Kazuma Sakoda, Ryouhei Kobayashi, Wataru Yamori, Toshiharu Shikanai
Summary: This study demonstrates that overexpressing K+ exchange antiporter 3 (KEA3) and introducing Flv proteins can alleviate photodamage of photosystem I and enhance the rate of CO2 fixation under fluctuating light conditions.
Review
Plant Sciences
Roberto Bassi, Luca Dall'Osto
Summary: The article explores the photoprotective mechanisms involved in the harmless removal of excess light energy absorbed by green algae and land plants, highlighting specific ways to protect plants from overexcitation. It emphasizes the importance of maintaining photosynthetic organisms within a narrow safety range between efficient light harvesting and photoprotection.
ANNUAL REVIEW OF PLANT BIOLOGY, VOL 72, 2021
(2021)
Article
Plant Sciences
Stephanie Bethmann, Ann-Kathrin Haas, Michael Melzer, Peter Jahns
Summary: Proper acclimation to different growth light intensities is crucial for plant survival and competitiveness. High light exposure leads to down-regulation and photoinhibition of photosystem II (PSII) activity. The xanthophyll zeaxanthin (Zx) plays a central role in these photoprotective processes. Different plant species show varying sensitivity to high light, accompanied by differential down-regulation of PSII and zeaxanthin epoxidase (ZEP) activity. This research highlights the species-specific acclimation strategies and the central role of Zx in photoprotection.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Biochemistry & Molecular Biology
Qi-Shi, Shi-Bao Zhang, Ji-Hua Wang, Wei Huang
Summary: The study showed that pre-illumination under high light conditions accelerates the activation rate of cyclic electron flow (CEF) and reduces the over-reduction of Photosystem I (PSI) under fluctuating light, by facilitating the electron sink downstream of PSI.
Article
Biochemistry & Molecular Biology
Yan-Bao Lei, Hong-Xia Xia, Ke Chen, Andelka Plenkovic-Moraj, Wei Huang, Geng Sun
Summary: Mosses can grow under fluctuating light conditions due to the roles of FLVs and CEF in regulating photosynthesis, especially when exposed to temperature stress. The coordination between FLV activity and CEF under fluctuating light and temperature stress is crucial for the photosynthetic acclimation of different moss species. The mosses with different light requirements show distinct FLV activity and CEF levels, indicating a species-specific response to fluctuating light and temperature stress.
Article
Plant Sciences
Gustaf E. Degen, Federica Pastorelli, Matthew P. Johnson
Summary: The production and consumption of ATP and NADPH in photosynthesis need to be carefully regulated. The PGR5 protein plays an important role in suppressing photosynthetic oscillations, and its absence leads to increased oscillatory behavior in Arabidopsis mutants.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Review
Plant Sciences
Mai Duy Luu Trinh, Shinji Masuda
Summary: The pH of different compartments in chloroplasts, such as the thylakoid lumen and stroma, is dependent on light. Light induces electron transfer and proton translocation, resulting in acidification and alkalization of the thylakoid lumen and stroma, respectively. Maintaining proper chloroplast pH levels during light and dark phases is crucial for efficient photosynthesis and other metabolic pathways. Understanding the molecular mechanisms of pH control in chloroplasts is important for understanding plant biology.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Yuki Okegawa, Nozomi Sato, Rino Nakakura, Ryota Murai, Wataru Sakamoto, Ken Motohashi
Summary: Plants use various photoprotective mechanisms to cope with sudden increases in light intensity. Redox regulation by thioredoxin (Trx) systems is also involved in this process. However, the functions of x- and y-type Trxs in response to fluctuating light conditions are not well understood.
Article
Microbiology
Hui-Yuan Steven Chen, Dariusz M. Niedzwiedzki, Anindita Bandyopadhyay, Sandeep Biswas, Himadri B. Pakrasi
Summary: Oxygenic photosynthetic organisms have evolved mechanisms, such as the cysteine-mediated excitation quenching mechanism of IsiA protein, to dissipate excess light energy and provide photoprotection under stress conditions, ensuring optimal photosynthetic productivity and minimizing photodamage to cells.
Article
Biochemistry & Molecular Biology
Wei Huang, Hong Hu, Shi-Bao Zhang
Summary: The study found that fluctuating light combined with chilling temperature leads to over-reduction of photosynthetic electron chain in deciduous species, mainly caused by increased electron flow from PSII.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2021)
Editorial Material
Plant Sciences
Johannes Kromdijk, Alistair J. McCormick
Summary: Breeding practices during the Green Revolution have helped maintain crop yields, but climate change poses challenges and requires new technologies for further improvements. Genetic engineering strategies, high-throughput phenotyping approaches, and utilization of genetic variation within crop germplasms are crucial for solutions. Efficiently combining traditional breeding practices with new technologies is a major goal for enhancing crop photosynthetic efficiencies.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Cell Biology
Hui Wang, Xiao-Qian Wang, Yi-Zhang Xing, Qing-Yun Zhao, Hui-Fa Zhuang, Wei Huang
Summary: In CAM plants, such as Vanilla planifolia, the enhancement of NPQ and Y(ND) for photoprotection when CO2 assimilation is restricted is mainly regulated by the activity of chloroplast ATP synthase (g(H)(+)) rather than cyclic electron flow (CEF).
Article
Plant Sciences
Ying-Jie Yang, Qi Shi, Hu Sun, Ren-Qiang Mei, Wei Huang
Summary: This study demonstrated that different ontogenetic stages of leaves in epiphytic orchid Dendrobium officinale utilize different photoprotective mechanisms to deal with fluctuating light. Mature leaves use water-water cycle (WWC) to prevent over-reduction of PSI, while young leaves enhance cyclic electron flow (CEF) around PSI to compensate for the lack of WWC, thus avoiding uncontrolled PSI over-reduction induced by fluctuating light.
FRONTIERS IN PLANT SCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Yasuhito Sakuraba
Summary: Light plays a crucial role in regulating various biological processes during the plant life cycle, including leaf senescence and the expression of nuclear genes. Various photoreceptors in plants perceive light of specific wavelengths and induce wavelength-specific responses.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Anthi Chrysafoudi, Sayan Maity, Ulrich Kleinekathoefer, Vangelis Daskalakis
Summary: Diatoms play a significant role in producing oxygen on Earth due to their exceptional light-harvesting properties, while their efficient adaptation to fluctuating light conditions is critical for photoprotection. A computational study reveals a pH-dependent adaptation at the molecular level in diatoms, with conformational changes in the FCP protein leading to a significant change in exciton transfer rate. A common photoprotective strategy between diatoms and higher plants is identified and discussed based on the interaction between FCP and LHCX proteins.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Biochemistry & Molecular Biology
Maria Ladeynova, Darya Kuznetsova, Maxim Mudrilov, Vladimir Vodeneev
Summary: Plants respond to environmental stresses by transmitting long-distance signals and changing hormone levels. Long-distance electrical signals, induced by local stimulation, regulate hormone levels and interact with phytohormones. This review provides insights into the interactions between electrical signals and phytohormones, highlighting important integration nodes involving changes in pH, Ca2+, and ROS levels, and gives an overview of how electrical signals and hormones work together to induce a systemic response.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Anna Pecherina, Marina Grinberg, Maria Ageyeva, Daria Zanegina, Elena Akinchits, Anna Brilkina, Vladimir Vodeneev
Summary: Salinity is a common factor that limits crop productivity. The negative effects of salt stress on plant processes are caused by osmotic stress and toxic ions. The study investigated how salinity affects photosynthesis, transpiration, water content, and cytosolic pH in tobacco and potato plants. Salinity decreased photosynthesis activity and led to a decrease in water content and transpiration. The cytosolic pH also decreased in tobacco and potato plants. The study analyzed potential mechanisms of the effects of salinity on photosynthesis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Plant Sciences
Lyubov Yudina, Ekaterina Sukhova, Ekaterina Gromova, Maxim Mudrilov, Yuriy Zolin, Alyona Popova, Vladimir Nerush, Anna Pecherina, Andrey A. A. Grishin, Artem A. A. Dorokhov, Vladimir Sukhov
Summary: Parameters of illumination, including spectra, intensity, and photoperiod, have a significant impact on plant cultivation under greenhouse conditions, especially for vegetables like lettuce. This study investigated the influence of photoperiod on lettuce production and photosynthesis parameters. The results showed that increasing the duration of illumination can stimulate dry weight accumulation, which can be achieved by either increasing light period or decreasing light intensity.
Article
Plant Sciences
Marina Grinberg, Yuliya Nemtsova, Maria Ageyeva, Anna Brilkina, Vladimir Vodeneev
Summary: This study investigated the mechanisms of systemic functional responses induced by electrical signals. It was found that chronic beta-irradiation had a positive effect on the morphometric parameters and photosynthetic activity of tobacco plants. Irradiation enhanced the plant's response to electrical signals, resulting in temporary changes in chlorophyll fluorescence parameters and increased amplitude and leaf coverage. Irradiation also enhanced signal-induced cytoplasmic acidification and showed stronger inhibition of stomatal conductance in the plants. The study concluded that the effect of irradiation on the systemic response induced by electrical signals mainly occurs during the transformation stage.
PHOTOSYNTHESIS RESEARCH
(2023)
Article
Plant Sciences
N. S. Mshenskaya, M. A. Grinberg, E. A. Kalyasova, V. A. Vodeneev, N. V. Ilin, N. N. Slyunyaev, E. A. Mareev, Y. V. Sinitsyna
Summary: Magnetic fields with a frequency of 14.3 Hz were found to have a protective effect on wheat plants under drought conditions, delaying harmful changes in transpiration and photosynthesis processes for several days.
Article
Biochemistry & Molecular Biology
Ekaterina Sukhova, Vladimir Sukhov
Summary: Electrical signals in plants are generated in response to various stressors and can greatly affect different physiological processes. These signals play a crucial role in integrating plant responses to stress, but they may also cause temporary separation between cells or plant parts. This separation can have adaptive benefits by storing energy compounds, limiting damage propagation, and potentially triggering programmed cell death.
Review
Chemistry, Physical
Dmitry A. Serov, Venera V. Khabatova, Vladimir Vodeneev, Ruibin Li, Sergey V. Gudkov
Summary: The resistance of microorganisms to antimicrobial drugs is a global issue, and significant efforts are being made to find antimicrobial components, approaches, and therapies. Selenium nanoparticles have high potential for antimicrobial activity, as evidenced by the increasing number of publications in the past decade. This review provides up-to-date information on the antimicrobial properties of selenium nanoparticles, including susceptible microorganisms, mechanisms of action on bacteria, and the impact of nanoparticle properties on antimicrobial activity. It comprehensively describes the antiviral, antibacterial, and antifungal effects of selenium nanoparticles.
Article
Environmental Sciences
Ekaterina Sukhova, Yuriy Zolin, Alyona Popova, Lyubov Yudina, Vladimir Sukhov
Summary: Salinization is a significant factor that limits agricultural plant productivity. Multispectral imaging and the photochemical reflectance index (PRI) can be used to detect early changes in plants under salinization. In this study, we investigated the sensitivity of modified PRIs to changes in pea plants under salinization treatment. The results showed that long-wavelength PRIs decreased, while short-wavelength PRIs increased under salinization. Long-wavelength PRIs were found to be more sensitive to plant changes and could potentially be used as a universal tool for early detection of stress in plants.
Article
Plant Sciences
Daria Ratnitsyna, Lyubov Yudina, Ekaterina Sukhova, Vladimir Sukhov
Summary: Photodamage is a key mechanism of photosynthetic disruption in plants under stress. Investigating photodamage is important for both basic and applied research. However, the complex mechanisms of photodamage make it difficult to use experimental methods, so developing mathematical models and conducting model-based analysis can overcome these limitations. In this study, a modified Farquhar-von Caemmerer-Berry model was developed to describe photodamage of photosynthetic electron transport in C-3 plants, using experimental results from pea plants. The model analysis showed that inactivation of linear electron flow and Rubisco can both increase and decrease photodamage. Simulation of photodamage under different temperatures and light intensities revealed multi-phase temperature dependences, with paradoxical increases in thermal tolerance observed under high temperatures. It was also found that changes in temperature optimums of linear electron flow and Rubisco can modify temperature dependences of photosynthetic electron transport under photodamage induction, mainly stimulating its photodamage.
Article
Plant Sciences
Lyubov Yudina, Alyona Popova, Yuriy Zolin, Ekaterina Sukhova, Vladimir Sukhov
Summary: By studying the effects of increased pressure, it was found that pressure can induce electrical signals and inhibit photosynthesis in plants.
Article
Plant Sciences
Maria N. Ageyeva, Tatiana A. Zdobnova, Mariia S. Nazarova, Galina N. Raldugina, Denis V. Beliaev, Vladimir A. Vodeneev, Anna A. Brilkina
Summary: Salinity has a significant impact on important processes in plants and decreases their yield. This study revealed that lower concentrations of NaCl result in cytosolic acidification in plant cells, while higher concentrations can cause an increase or return to normal levels of cytosolic pH. Additionally, salinity inhibits plant development and affects morphology-related parameters. The relationship between cell length and NaCl concentration is nonlinear.
Article
Plant Sciences
Alyona Grishina, Oksana Sherstneva, Anna Zhavoronkova, Maria Ageyeva, Tatiana Zdobnova, Maxim Lysov, Anna Brilkina, Vladimir Vodeneev
Summary: This study compares the efficiency of hyperspectral imaging and pulse amplitude modulation fluorometry in detecting plant pathogens, and finds that pulse amplitude modulation fluorometry allows for earlier assessment of physiological changes caused by infection.