Article
Plant Sciences
Zhu Cun, Xiang-Zeng Xu, Jin-Yan Zhang, Sheng-Pu Shuang, Hong-Min Wu, Tong-Xin An, Jun-Wen Chen
Summary: Photosynthetic adaptive strategies of shade-tolerant species Panax notoginseng to high and low light conditions were investigated. Growth irradiance affected the thickness of leaf tissues and the performance of photosynthesis-related pigments and antioxidant enzymes. The results suggest that PSI photoinhibition and photodamage to PSII acceptor side are key factors influencing the adaptability of P. notoginseng to different light regimes.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Environmental Sciences
Rini Rahul, Pallavi Sharma
Summary: The study identified cadmium-tolerant and cadmium-sensitive genotypes in castor, with sensitive genotypes showing significant declines in various growth parameters and physiological indicators under cadmium treatment. Increased levels of Cu, H2O2, and MDA, along with reduced photosynthetic parameters, may contribute to the observed cadmium sensitivity in the sensitive genotype.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Plant Sciences
Hiroshi Ozaki, Daisuke Takagi, Yusuke Mizokami, Takeshi Tokida, Hirofumi Nakamura, Hidemitsu Sakai, Toshihiro Hasegawa, Ko Noguchi
Summary: The recovery from photoinhibition is slower in PSI than in PSII, and the susceptibility of PSI to photoinhibition is influenced by environmental factors and rice varieties. Chlorophyll and nitrogen content are related to the susceptibility.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Plant Sciences
Ines Mihaljevic, Marija Viljevac Vuletic, Domagoj Simic, Vesna Tomas, Daniela Horvat, Marko Josipovic, Zvonimir Zdunic, Krunoslav Dugalic, Dominik Vukovic
Summary: Genotype-dependent responses of apples to drought stress were evaluated between commercial and traditional apple cultivars, showing that traditional cultivar Crvenka exhibited better tolerance with higher photosynthetic efficiency, leaf water content, chlorophyll content, and lower lipid peroxidation. In contrast, the commercial cultivar Golden Delicious Reinders showed decreased water content in leaves, increased lipid peroxidation levels, and photoinhibition, indicating its adverse response to drought stress.
Article
Biochemistry & Molecular Biology
Jana Knoppova, Jianfeng Yu, Jan Janouskovec, Petr Halada, Peter J. Nixon, Julian P. Whitelegge, Josef Komenda
Summary: Photochemical energy conversion in oxygenic photosynthesis relies on membrane-embedded chlorophyll-binding protein complexes, which are regulated by lipoproteins such as Ycf48. Ycf48, a lipoprotein assembly factor in cyanobacteria, plays a crucial role in the biogenesis and function of the photosystem II complex. The unique lipobox sequence in Ycf48 distinguishes it from canonical lipobox sequences and highlights its importance in cyanobacterial PSII assembly.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Hedayatollah Karimzadeh Soureshjani, Ahmad Nezami, Jafar Nabati, Ehsan Oskoueian, Mohammad Javad Ahmadi-Lahijani
Summary: This study evaluated the physiological, biochemical, and molecular alterations in chickpea genotypes under freezing temperatures and found that the cold-tolerant genotype exhibited better tolerance to low temperatures compared to the cold-sensitive genotype. The cold-tolerant genotype showed higher antioxidant activity in leaves and a more rapid increase in physiological indicators such as proline and enzymatic antioxidants. The over-expression of genes related to antioxidant enzymes and proline in the cold-tolerant genotype led to lower lipid peroxidation and better survival rates under freezing stress.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Chemistry, Analytical
Trina Merrick, Ralf Bennartz, Maria Luisa S. P. Jorge, Stephanie Pau, John Rausch
Summary: Remote sensing using chlorophyll fluorescence is a non-destructive method to detect plant physiological response to the environment. This study used a relatively simple technique with a spectroradiometer and blue-red LED to monitor plant stress.
Article
Plant Sciences
Andrea Colpo, Sara Demaria, Costanza Baldisserotto, Simonetta Pancaldi, Marian Brestic, Marek Zivcak, Lorenzo Ferroni
Summary: Wheat mutants with reduced chlorophyll synthesis recover a wild-type phenotype due to recovery of photosynthetic-membrane functionality. Light fluctuations impact productivity of the mutants, making outdoor cultivation challenging. The accumulation of interchain electron carriers is an acclimative response to the environment and affects plant morphogenesis and grain production.
Article
Plant Sciences
Awais Ali, Piero Santoro, Jacopo Mori, Antonio Ferrante, Giacomo Cocetta
Summary: This study used an indoor UV-B chamber to irradiate spearmint with UV-B at a single wavelength of 315nm and found that UV-B had an impact on the accumulation of certain substances in plants, such as chlorophyll and carotenoids, as well as phenolic compounds and anthocyanins. UV-B radiation also led to lipid peroxidation and the production of secondary metabolites. In addition, chlorophyll levels decreased while flavanols increased. Overall, UV-B radiation affected photosystem II and plant yield, and provided new directions for future research on the interaction between plants and UV-B.
PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Bradley C. Posch, Julia Hammer, Owen K. Atkin, Helen Bramley, Yong-Ling Ruan, Richard Trethowan, Onoriode Coast
Summary: Wheat photosynthetic heat tolerance can be quantified using minimal chlorophyll fluorescence to measure the critical temperature. We investigated the intraspecies variation and plasticity of wheat T-crit under elevated temperature and found it to be unrelated to global patterns of interspecies heat tolerance. The observed genotypic variation and plasticity suggest that T-crit could be a useful trait for phenotyping wheat photosynthetic heat tolerance.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Agronomy
Paulina A. Rajewicz, Chao Zhang, Jon Atherton, Shari Van Wittenberghe, Anu Riikonen, Troy Magney, Beatriz Fernandez-Marin, Jose Ignacio Garcia Plazaola, Albert Porcar-Castell
Summary: Chlorophyll fluorescence can be used as a proxy for photosynthesis in boreal forests. This study measured the spectral chlorophyll fluorescence in leaves of three dominant evergreen species in the boreal ecosystem and analyzed the correlations with other traits to understand the spatial and temporal variation in chlorophyll fluorescence. The findings suggest that the diversity of species and light environments within an ecosystem generate baseline variation in leaf spectral chlorophyll fluorescence and contrasting seasonal photosynthetic acclimation patterns.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Plant Sciences
Zihui Zhang, Zhiyuan Teng, Nan Wang, Meng Zhang, Guangyu Sun, Yanbo Hu, Xiuli Zhang
Summary: The study investigated the responses of mulberry seedlings to simulated acid rain at different pH values and found that the seedlings showed higher tolerance to acid rain at pH 4.5, with stimulating effects on growth.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Biology
Joao Serodio, Douglas A. Campbell
Summary: Oxygenic photoautotrophs paradoxically suffer from photoinhibition of Photosystem II (PSII), affecting their photosynthetic productivity. Light attenuation in optically thick samples influences the measurement and detection of photoinhibition.
JOURNAL OF THEORETICAL BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Sujuan Duan, Beibei Dong, Ziqi Chen, Liu Hong, Pengxiang Zhang, Ziyue Yang, Hong-Bin Wang, Hong -Lei Jin
Summary: Nonphotochemical quenching (NPQ) is an important photoprotective mechanism that dissipates excess light energy as heat. A newly discovered form of NPQ, qH, remains unclear in terms of its specific mechanism. This study found that the damage repair factor HHL1 interacts with SOQ1, and together they regulate NPQ.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Than Htwe, Ponlachart Chotikarn, Saowapa Duangpan, Jumpen Onthong, Pimchanok Buapet, Sutinee Sinutok
Summary: Exposure to high copper concentrations resulted in a decline in photosynthetic capacity, delays in flowering, lipid peroxidation, and reduced leaf area for rice. Higher copper concentrations also led to a significant decrease in rice grain yield. The integrated biomarker response values reflected the severity of copper toxicity, showing a decreasing trend from tillering stage to harvesting stage.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)