Article
Environmental Sciences
Jaakko Oivukkamaki, Jon Atherton, Shan Xu, Anu Riikonen, Chao Zhang, Teemu Hakala, Eija Honkavaara, Albert Porcar-Castell
Summary: The potential of chlorophyll fluorescence and photoprotection-based indices for the detection of a wide range of nutrient contents in vegetation was investigated. Leaf-level observations showed that the relationships between these indices and foliar nutrient contents were influenced by leaf chlorophyll contents and leaf morphology. Canopy-level observations further revealed that spectral indices were also influenced by canopy structure, affecting their capacity to detect foliar nutrient contents.
Article
Plant Sciences
Jiewei Hao, Xueyan Xu, Lina Zhang
Summary: The study revealed significant impacts of seasonal climatic factors on the photochemical performance of terrestrial mosses, with different species developing various mechanisms to cope with adverse abiotic stresses. Some moss species showed good adaptation to habitat temperature and water pattern changes, although they still experienced reduced CO2 assimilation efficiency during drier months, while others were more susceptible to seasonality, especially during periods of lower rainfall and relative humidity. Certain moss species were identified as ideal ecological indicators for photosynthetic acclimation to stressed environments due to their sensitivity to water pattern changes resulting from climate change.
Article
Plant Sciences
James Bunce
Summary: Experimental systems simulating future elevated CO2 conditions often have fluctuating CO2, which can reduce photosynthesis by decreasing stomatal conductance and the photochemical efficiency of photosystem II. However, the impact of CO2 fluctuations varies among different species, with some showing no change in photosynthesis and stomatal conductance.
Article
Biochemistry & Molecular Biology
Aleksandra Orzechowska, Anna Czaderna-Lekka, Martin Trtilek, Piotr Rusiniak
Summary: This study investigated the antifouling effect of copper oxide (Cu2O)- and zineb-based coatings on Cyanothece sp. ATCC 51142 by analyzing chlorophyll fluorescence. It was found that Cyanothece cultures are sensitive to biocides released from antifouling paints and exhibited by contact with the coated surfaces. The maximum quantum yield of photosystem II (F-V/F-M) changed within the first 12 hours of exposure, and partial recovery was observed 24 hours after exposure to a copper- and zineb-free coating.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
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
Plant Sciences
Shubhangani Sharma, Upma Bhatt, Jyotshana Sharma, Ahmad Darkalt, Jacek Mojski, Vineet Soni
Summary: This study evaluated the response of peanuts to various waterlogging conditions in terms of their development, metabolic processes, and chlorophyll fluorescence characteristics. The results indicated that long-term waterlogging significantly affected the growth and physiological performance of peanuts, with an interaction between different parameters.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Agronomy
Xiaojie Qin, Deke Xing, Yanyou Wu, Weixu Wang, Meiqing Li, Kashif Solangi
Summary: This study investigated the diurnal variations in leaf electrophysiology, water potential, gas exchange, and chlorophyll fluorescence parameters of three plant species in karst areas. The results showed that different plant species have different strategies for regulating photosynthetic performance.
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
Plant Sciences
Kouki Hikosaka, Katsuto Tsujimoto
Summary: Solar-induced chlorophyll fluorescence (SIF) and photochemical reflectance index (PRI) can be useful for remote sensing of photosynthetic activity at various spatial scales. The relationship between chlorophyll fluorescence and PRI with the CO2 assimilation rate at a leaf scale can provide valuable insights into the efficiency of photosynthesis.
JOURNAL OF PLANT RESEARCH
(2021)
Article
Plant Sciences
Ze Wei, Fengying Duan, Xuezhen Sun, Xianliang Song, Wenbin Zhou
Summary: Long-term fluctuating light conditions inhibit rice growth, affecting processes such as PSI and PSII inhibition, reduced ATP synthase activity, and NPQ regulation.
PLANT CELL AND ENVIRONMENT
(2021)
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
Beat Keller, Lars Zimmermann, Uwe Rascher, Shizue Matsubara, Angelina Steier, Onno Muller
Summary: Photosynthesis rapidly adapts to fluctuating environments to optimize sunlight energy absorption, with high-efficiency genotypes successfully converting photochemical energy uptake into biomass production. Monitoring photochemical energy uptake allows for estimating biomass production and identifying energy-efficient genotypes for improved crop growth models and ecosystem productivity estimates.
Article
Environmental Sciences
Hao Jiang, Zhigang Liu, Jin Wang, Peiqi Yang, Runfei Zhang, Xiuping Zhang, Pu Zheng
Summary: This study explores the feasibility of estimating non-photochemical quenching (NPQ) using remote sensing technology, considering the two components of NPQ. The experimental results show that fF captures NPQ variations well under high illumination, while IRECI and NIRv are sensitive to the non-qE component variation under low illumination. Coupling fF with either IRECI or NIRv improves the accuracy of NPQ estimation. These findings contribute to the further development of remote sensing methods for NPQ estimation at the canopy scale in the future.
Article
Environmental Sciences
Asma Hanif, Zainul Abideen, Khwaja Ali Hasan, Basit Ali, Ali El-Keblawy, Muhammad Umar, Yamna Rao, Zamin Shaheed Siddiqui
Summary: Microbial inoculants are an environmentally sustainable approach for controlling soil pathogens and achieving agricultural intensification. This research aimed to examine the impact of newly isolated microbial biocontrol agents on growth and photosynthetic efficiency in pathogen-infected plants. The results showed that these agents inhibited the colonization of pathogenic fungus and significantly improved the growth of corn plants. Additionally, they improved various parameters of photosystem II, enhancing the efficiency of light reaction. These findings demonstrate that microbial antagonists offer an effective and eco-friendly alternative for sustainable agriculture.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Agronomy
Jaroslav Lang, Barbora Zikmundova, Josef Hajek, Milos Bartak, Peter Vaczi
Summary: The sensitivity of fodder galega to herbicides and its photosynthetic performance were evaluated. The application of selected herbicides had negative effects on the primary photosynthetic processes. MCPA and MCPB had a greater impact on the plants compared to IMA.