Article
Plant Sciences
Olli Virtanen, Sergey Khorobrykh, Esa Tyystjarvi
Summary: The study demonstrates that algae adapted to extreme high light can grow and thrive in such conditions, potentially involving genetic or epigenetic variations. In addition, extreme light acclimation is associated with a high carotenoid-to-chlorophyll ratio, slowed down PSII charge recombination reactions, and reduced levels of O-1(2).
PHOTOSYNTHESIS RESEARCH
(2021)
Article
Plant Sciences
Vasily V. Terentyev
Summary: The study reveals that the mutant cai3 in C. reinhardtii cells exhibits an unusual chloroplast morphology under moderate light, deficiency in CAH3 leads to an increase in PSII photoprotective mechanisms, and a shift in the balance of the PSII damage-repair cycle.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Environmental Sciences
Lingyang Zhang, Genji Yang, Hassimi Abu Hasan, Jie Fan, Bin Ji
Summary: This study investigates the biological adaptation mechanisms of microalgal-bacterial granular sludge (MBGS) under outdoor light-limited conditions. The results show that MBGS has excellent pollutant removal performance and that the extracellular polymeric substances and glycogen content of MBGS significantly increase. The main functional microalgae and bacteria are Leptolyngbyaceae and Rhodanobacteria, respectively. Additionally, MBGS can adjust the photosynthetic pathway to ensure the completion of photosynthesis.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Applied
Yuehui Li, Duanhui Si, Wangyin Wang, Song Xue, Wenzhe Shang, Zhanyou Chi, Can Li, Ce Hao, Govindjee Govindjee, Yantao Shi
Summary: In a groundbreaking discovery, researchers have found that the PSII core complex can drive the assimilation of CO2 to produce methanol under light, challenging the conventional understanding of photosynthesis. This finding holds significant implications for our understanding of the mechanism behind photosynthesis.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Wen-He Cai, Xin-Qiang Zheng, Yue-Rong Liang
Summary: The PSII of the light-sensitive albino tea plant is more vulnerable to high-light stress, which leads to the degradation of PSII subunits and disruption of light-harvesting chlorophyll-protein complexes, resulting in leaf bleaching. The de novo synthesis and repair of PSII subunits are involved in the impairment of PSII complexes, leading to the albino phenotype in the tea plant.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Optics
Kotaro Inoue, Arun Anand, Myungjin Cho
Summary: Digital holographic microscopy is a promising technique for high-resolution 3D imaging, but faces challenges with high-power lasers and light-sensitive samples. A new hologram recovery algorithm called angular spectrum matching is proposed to recover holograms at low light intensities, improving digital holographic microscopy imaging.
Article
Biochemistry & Molecular Biology
Ying-Qi Wang, Jing-Jing Ye, Hong-Zhiyuan Yang, Da Li, Xiao-Xiang Li, Yong-Kang Wang, Xin-Qiang Zheng, Jian-Hui Ye, Qing-Sheng Li, Yue-Rong Liang, Jian-Liang Lu
Summary: The light-sensitive albino tea plant can gradually recover its photosynthetic pigments, chloroplast ultrastructure, and photosynthesis parameters from pale yellow to green through short-term shading treatment. This is attributed to the proper formation of pigment-protein complexes on the thylakoid membrane, benefiting from increased levels of LHCII subunits, particularly the deficiency of Lhcb1, in the shaded leaves of 'HJY'.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Hyun-Woo Kim, Myungjin Cho, Min-Chul Lee
Summary: This study focuses on the research of three-dimensional reconstruction under low illumination environment. Photon-counting integral imaging is a technique to visualize 3D images under low light conditions. However, the conventional method has the issue of randomness due to the temporal and spatial independence of Poisson random numbers. In this paper, the Kalman filter is applied to improve the visual quality by correcting the errors in the photon-counting integral imaging. The proposed method shows better structure similarity, peak signal-to-noise ratio, and cross-correlation values compared to the conventional method, indicating a more accurate visualization of low illuminated images. Furthermore, it is expected to contribute to the development of autonomous driving technology and security camera technology.
Article
Plant Sciences
X. Liu, S. Gao, Y. Liu, B. Cao, Z. Chen, K. Xu
Summary: The research found that high light and drought have different effects on the photosynthesis of Welsh onions. High light causes stomatal limitation leading to a decrease in the net photosynthesis rate, while drought and high light combined lead to non-stomatal limitation. Both conditions result in the damage to the receptor and donor sides of PSII, reducing the photosynthetic efficiency of Welsh onions.
Article
Biochemistry & Molecular Biology
Takuto Ariga, Yasuhito Sakuraba, Mengna Zhuo, Mailun Yang, Shuichi Yanagisawa
Summary: In this study, a new nitrate-activated transcriptional cascade involved in chloroplast development and function maintenance was identified. This cascade regulates the expression of VAR2 gene, which is responsible for quality control of photo-damaged thylakoid membrane proteins. The cascade also plays a role in enhancing photosynthetic light energy utilization, especially in high light environments. These findings provide insights into a novel mechanism for integrating information on nitrogen and light environments, and have implications for improving light energy utilization in plants under low nitrogen conditions.
Article
Multidisciplinary Sciences
Magdalena Lazicka, Adriana Palinska-Saadi, Paulina Piotrowska, Bohdan Paterczyk, Radoslaw Mazur, Magdalena Maj-Zurawska, Maciej Garstka
Summary: The combination of trimeric form of the light-harvesting complex II, a porous graphite electrode, and the application of a quinone derivative allows the construction of a new type of biohybrid photoactive system. The photocurrent generated is directly dependent on the quenching of Chl fluorescence. The system exhibits stability and high photocurrent generation.
SCIENTIFIC REPORTS
(2022)
Article
Horticulture
Xiaohua Ma, Qin Zhou, Qingdi Hu, Xule Zhang, Jian Zheng, Renjuan Qian
Summary: This study analyzed the effects of light intensity on Clematis tientaiensis and found that high light intensity caused chlorosis and reduced photosynthetic efficiency, while moderate light conditions resulted in good adaptability. The results highlight the importance of proper light management for the growth and population expansion of Clematis tientaiensis.
Article
Plant Sciences
Guillem Pascual-Aznar, Grzegorz Konert, Martina Beckova, Eva Kotabova, Zdenko Gardian, Jana Knoppova, Lenka Bucinska, Radek Kana, Roman Sobotka, Josef Komenda
Summary: Photosystem II (PSII) is a large membrane protein complex involved in primary charge separation in oxygenic photosynthesis. The assembly of PSII involves different modules that contain chlorophyll-binding proteins, membrane polypeptides, pigments and cofactors. Psb35 protein, identified in the CP47 antenna module, plays a crucial role in the accumulation and stability of chlorophyll-binding proteins.
PLANT AND CELL PHYSIOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Neha Singh, Ashish Kumar Bhandari
Summary: This article introduces an algorithm that enhances low light images and denoises them to produce visually pleasing outputs. By using L-2-L-P image decomposition, the proposed algorithm obtains reflectance and illumination concurrently, and corrects the illumination layer using a proposed weighting distribution to generate enhanced output. Additionally, a noise suppressed bilateral filter and a gamma function are employed for denoising and contrast improvement. Experimental trials show that the proposed method produces results with good contrast and brightness compared to various enhancement techniques.
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Enrique Ortega-Forte, Anna Rovira, Marta Lopez-Corrales, Alba Hernandez-Garcia, Francisco Jose Ballester, Eduardo Izquierdo-Garcia, Mireia Jorda-Redondo, Manel Bosch, Santi Nonell, Maria Dolores Santana, Jose Ruiz, Vicente Marchan, Gilles Gasser
Summary: Photodynamic therapy (PDT) is a promising cancer treatment method, but it is limited by its oxygen dependency and poor tissue penetration of some photosensitizers (PSs) activatable with short wavelengths. In this study, a novel hypoxia-active PS with operability in the near-infrared (NIR) region was developed, which showed high photoactivity toward cancer cells even under hypoxic environments. This strategy could potentially pave the way for the development of novel NIR- and hypoxia-active Ru(ii)-based theragnostic PSs.