Article
Plant Sciences
Andrej Filacek, Marek Zivcak, Lorenzo Ferroni, Maria Barboricova, Kristina Gasparovic, Xinghong Yang, Marco Landi, Marian Brestic
Summary: The study found that high temperature significantly reduced the photosynthetic assimilation rate due to non-stomatal (biochemical) limitation of photosynthetic processes; chlorophyll fluorescence only showed a mild decrease in the quantum efficiency of photosystem II, indicating mainly reversible heat stress effects; heat stress led to a decrease in the number of active PS II reaction centers (RC/ABS) and overall activity of PSII (PIabs) in all genotypes, while PS I (parameter psi(REo)) was negatively influenced by heat stress only in the non-acclimated variant.
Article
Plant Sciences
Jiafei Zhang, Liang Wan, C. Igathinathane, Zhao Zhang, Ya Guo, Dawei Sun, Haiyan Cen
Summary: This study demonstrated the spatiotemporal heterogeneity of chlorophyll content and fluorescence response within rice leaves and canopies. The research revealed that nitrogen supply affects the occurrence time of the reverse vertical pattern and highlights the potential use of end acceptors at photosystem I electron acceptor side per cross section as a sensitive predictor for leaf chlorophyll content heterogeneity.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Environmental Sciences
Hugo Virgilio Perales-Vela, Martha Ofelia Salcedo-Alvarez, Rogelio Parra-Marcelo, Llarai Carolina Gaviria-Gonzalez, Alfredo De Jesus Martinez-Roldan
Summary: The study found that increasing concentrations of methyl viologen can lead to decreased growth, pigment content, and metabolic activity of Chlorella vulgaris. Inhibition of electron transport between quinone A and quinone B of photosystem II by MV directly impacts photosynthetic electron transport.
Article
Biodiversity Conservation
Kai-Ming Sun, Cuiqiong Zhao, Qing Ju, Yulu Tian
Summary: This study found that marine biofilms selectively utilize different nutrients, and only ammonium induced significant NIFTs phenomenon. We observed a linear relationship between fluorescence changes during ammonium-induced NIFTs and ammonium concentrations, with a final concentration of 500 μM ammonium triggering the most significant fluorescence increase. Therefore, nutrient-limited marine biofilms have the potential to monitor ammonium disturbance in water.
ECOLOGICAL INDICATORS
(2023)
Article
Plant Sciences
Haoyun Wang, Feng Wu, Min Li, Xiaokun Zhu, Changshuang Shi, Changchang Shao, Guijie Ding
Summary: Primary needles of one-year-old Pinus massoniana seedlings exhibit greater mesophyll tissue and stomata compared to secondary needles. Primary needles show high photoprotection through thermal dissipation, while secondary needles increase Chl b and carotenoids content in November for enhanced photoprotection against low temperatures.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Plant Sciences
Antonio J. Serrato, Jose A. Rojas-Gonzalez, Diego Torres-Romero, Paola Vargas, Angel Merida, Mariam Sahrawy
Summary: The different isoforms of Thioredoxins (TRXs) play essential roles in light energy uptake and primary metabolism regulation in plants. Disruption of TRX m signalling can have harmful consequences on chloroplast metabolism and plant development levels. Furthermore, TRX m isoforms are involved in fine-tuning the response to high light conditions, such as regulating the accumulation of protective pigments like anthocyanin.
Article
Spectroscopy
P. Vitek, K. B. Mishra, A. Mishra, B. Vesela, H. Findurova, K. Svobodova, M. Oravec, P. P. Sahu, K. Klem
Summary: Exploring photosynthetic processes via non-invasive means provides additional advantages in phenotyping and precision agriculture. This study used Raman spectroscopy and fluorescence-based methods to investigate the changes in photosynthetic processes and protective mechanisms in Arabidopsis thaliana. The results revealed oxidative damage and depletion of carotenoids under high light conditions, as well as increased accumulation of phenolics. The mutant ros1 showed lower accumulation of anthocyanin compared to the wild-type, supporting the findings from Raman spectroscopy.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
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
Jie Huang, Xiaoling Li, Xuesong Wang, Shijiang Zhu, Kun Lv, Jin Yang, Yingping Huang, Tao Xu, Guiyun Huang, Liwen Qiu, Chen Ye
Summary: This study investigated the photosynthetic adaptability and habitat adaptation strategies of Distylium chinense under heterogeneous habitats. The results showed significant differences in photosynthetic characteristics among different habitats. Water use efficiency and stomatal conductance were found to be correlated with specific leaf area, leaf area, and leaf dry weight. Light intensity, soil water content, air humidity, and temperature were identified as the main factors affecting photosynthetic characteristics and leaf functional traits. The findings provide baseline information for the conservation and ecological restoration of the newly formed hydro-fluctuation zone and other similar degenerative riparian ecosystems.
SOUTH AFRICAN JOURNAL OF BOTANY
(2022)
Article
Agronomy
Jaroslav Lang, Peter Vaczi, Milos Bartak, Josef Hajek, Antonin Kintl, Barbora Zikmundova, Jakub Elbl
Summary: An evaluation was conducted to assess the influence of photosynthetic mechanisms on the yields of an intercropping system consisting of maize, Lupinus sp., and Melilotus albus. The results showed that the photosystem II capacity and electron transport rate of maize declined during a four-day episode of warm weather. Additionally, the performance index, which indicates plant vitality, also decreased. Intercropping systems had a positive effect on the primary photosynthetic parameters of maize.
Article
Horticulture
Tassia Fernanda Santos Neri Soares, Ana Veruska Cruz da Silva, Rajeev Arora
Summary: This study assessed the chilling tolerance of Moringa oleifera Lam. and found that chilling injury caused irreversible damage to the physiological indicators of the tree.
SCIENTIA HORTICULTURAE
(2023)
Article
Limnology
Sarina Niedzwiedz, Kai Bischof
Summary: Kelps play a crucial role as ecosystem engineers in polar rocky shore coastlines. The distribution of kelps is influenced by underwater light climate and temperature. With global temperatures rising, it is predicted that temperate kelp species will expand into the Arctic, aided by accelerating glacial melt. This study investigated the effects of retreating glaciers and rising temperatures on the potential habitat of kelps in Arctic fjords. The results showed that glacial meltwater plumes led to reduced light intensities and changed spectral composition, possibly causing an upward shift of the lower depth limit of kelp. Furthermore, rising temperatures affected the light-use characteristics of two kelp species, potentially leading to changes in species composition.
LIMNOLOGY AND OCEANOGRAPHY
(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
Multidisciplinary Sciences
Atsushi Ishida, Tomomi Nakamura, Shin-Taro Saiki, Jin Yoshimura, Satoshi Kakishima
Summary: Despite extensive studies on plant life history, physiology, and molecular phylogeny, how physiology changes with evolution of life history remains largely unknown. Research on two closely related Strobilanthes plants showed differences in thermal acclimation and assimilation between monocarpic and polycarpic species, highlighting a potential impact on vulnerability to global warming due to evolutionary changes in thermal adaptation in plants.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Lars Nichelmann, Frauke Pescheck
Summary: The study found that seasonal increases of UV-B radiation had slight negative effects on HCAs in plants, while low temperatures increased the content of HCAs. Kaempferol and quercetin derivatives increased significantly under ambient UV-B radiation, with low temperatures interacting with this effect. The shift of epidermal UV-A shielding from kaempferol to quercetin derivatives was observed in the presence of UV-B, but a substantial increase in quercetin derivatives did not affect UV absorbance.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Plant Sciences
H. Mattila, D. Valev, K. B. Mishra, V. Havurinne, O. Virtanen, M. Antinluoma, E. Tyystjarvi
Summary: The growth rates during batch and turbidostat modes varied independently of each other, indicating that a growth rate measured in a batch cannot be used to determine the continuous growth rate. Different photoinhibition susceptibilities in tested algae suggest different amounts of energy invested in repair. However, photoinhibition tolerance did not necessarily lead to a fast growth rate at a moderate light intensity.
Article
Plant Sciences
Marcel A. K. Jansen, Alexander Ac, Karel Klem, Otmar Urban
Summary: Interactions between climate change and UV penetration in the biosphere are causing plants to be exposed to new combinations of UV radiation and drought, with potential additive, synergistic, or antagonistic impacts. Lack of understanding of the impacts of combined treatments creates uncertainties that hinder predictions of future ecological change. In plants exposed to both UV and drought, the defense responses appear to be less-than-additive, indicating possible cross-resistance mechanisms. Increases in drought exposure in future climates may be mitigated by naturally high UV regimes.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Filip Oulehle, Karolina Tahovska, Alexandr Ac, Tomas Kolar, Michal Rybnicek, Petr Cermak, Petr Stepanek, Miroslav Trnka, Otmar Urban, Jakub Hruska
Summary: Stable N isotopes in tree rings provide helpful information on the trajectory of the N cycle over the last century with direct consequences for a better understanding of future interactions among N, P and C cycles in terrestrial ecosystems.
ENVIRONMENTAL POLLUTION
(2022)
Article
Plant Sciences
Uthman O. Badmus, Alexander Ac, Karel Klem, Otmar Urban, Marcel A. K. Jansen
Summary: UV exposure induces changes in carotenoid biosynthesis and accumulation in plants, but there is no consensus on the direction and amplitude of these effects. Meta-analysis of published studies revealed that only violaxanthin was consistently induced by UV exposure. Changes in violaxanthin accumulation were accompanied by decreases in antheraxanthin and zeaxanthin.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Plant Sciences
Sravankumar Thula, Taraka Ramji Moturu, Hymavathi Salava, Veronika Balakhonova, Miroslav Berka, Pavel Kerchev, Kumud Bandhu Mishra, Tomasz Nodzynski, Sibu Simon
Summary: Strigolactones (SLs), derived from carotenoids, play a unique and dynamic role in regulating photosynthetic pathways and high light-driven stress adaptation in plants.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Spectroscopy
P. Vitek, K. B. Mishra, A. Mishra, B. Vesela, H. Findurova, K. Svobodova, M. Oravec, P. P. Sahu, K. Klem
Summary: Exploring photosynthetic processes via non-invasive means provides additional advantages in phenotyping and precision agriculture. This study used Raman spectroscopy and fluorescence-based methods to investigate the changes in photosynthetic processes and protective mechanisms in Arabidopsis thaliana. The results revealed oxidative damage and depletion of carotenoids under high light conditions, as well as increased accumulation of phenolics. The mutant ros1 showed lower accumulation of anthocyanin compared to the wild-type, supporting the findings from Raman spectroscopy.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Plant Sciences
Jiri Kubasek, Tereza Kalistova, Jitka Janova, Balzhan Askanbayeva, Jan Bednar, Jiri Santrucek
Summary: In this study, a new isotope labeling method was used to investigate the dynamics of cuticular waxes in Clusia rosea plants. The results showed that the wax composition differs between epicuticular and intracuticular wax, and that the wax is renewed during leaf ontogeny. These findings have important implications for ecophysiology.
Article
Environmental Sciences
Daniel Kovac, Jan Novotny, Ladislav Sigut, John Grace, Otmar Urban
Summary: We measured dynamics of solar-induced chlorophyll fluorescence at telluric oxygen absorption bands and compared it with NDVI. We also analyzed the impact of branch and leaf positions on fluorescence emissions and the relationship between fluorescence and absorbed photosynthetically active radiation (APAR) for both evergreen spruce and deciduous beech forests. Our results showed different seasonal dynamics of fluorescence emissions in the two forests, as well as their connections with gross primary productivity (GPP) and seasonal GPP.
Article
Multidisciplinary Sciences
Jan Vondrak, Stanislav Svoboda, Lucie Zibarova, Lenka Stenclova, Jan Mares, Vaclav Pouska, Jiri Kosnar, Jiri Kubasek
Summary: Alcobiosis is a symbiotic relationship between algae and corticioid fungi. The identities of the algal and fungal partners were determined using DNA barcoding. The activity of the algae was examined through gas exchange and chlorophyll fluorescence techniques. Carbon transfer from algae to fungi was observed in certain fungal species. The presence of algae did not cause harm to the fungal partner, and the fungi were not nutritionally dependent on the algae.
SCIENTIFIC REPORTS
(2023)
Article
Plant Sciences
Milos Bartak, Josef Hajek, Mehmet Goekhan Halici, Michaela Bednarikova, Angelica Casanova-Katny, Peter Vaczi, Anton Puhovkin, Kumud Bandhu Mishra, Davide Giordano
Summary: The Antarctic lichen Xanthoria elegans has effective photoprotective mechanisms to cope with short-term high light stress. It exhibits a high degree of photoinhibition resistance and non-photochemical quenching mechanisms.
Article
Environmental Sciences
Filip Oulehle, Otmar Urban, Karolina Tahovska, Tomas Kolar, Michal Rybnicek, Ulf Buntgen, Jakub Hruska, Josef Caslavsky, Mirek Trnka
Summary: In central European forests, acid air pollution and soil calcium concentration directly regulate the intrinsic water-use efficiency of trees. The observed association between soil acidity, calcium uptake, and transpiration suggests that calcium biogeochemistry has important, yet unrecognized, implications for the plant physiological upregulation of carbon and water cycles.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Plant Sciences
Anamika Mishra, Kumud Bandhu Mishra, Katerina Sura, Barbora Vesela, Karel Klem, Otmar Urban
Summary: Cold acclimation is a natural strategy for increasing plant survival at sub-zero temperatures. However, the regulation of non-photochemical quenching processes during cold acclimation is still unclear.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Forestry
Kojo Kwakye Ofori-Amanfo, Karel Klem, Barbora Vesela, Petr Holub, Thomas Agyei, Stanislav Juran, John Grace, Michal Marek, Otmar Urban
Summary: This study investigates the interactive effects of CO2 concentration, nitrogen supply, and water availability on the physiological, morphological, and stoichiometric traits of Norway spruce saplings. The results show that water and nitrogen limitation can attenuate the stimulatory effects of elevated CO2 concentration on photosynthesis. Furthermore, the combination of high nitrogen supply and reduced water availability is necessary for elevated CO2 concentration to improve water-use efficiency. These findings highlight the importance of incorporating these interactions into future mechanistic models predicting carbon sequestration and forest growth.
Article
Water Resources
Max C. A. Torbenson, Rudolf Brazdil, James H. Stagge, Jan Esper, Ulf Buntgen, Adam Vizina, Martin Hanel, Oldrich Rakovec, Milan Fischer, Otmar Urban, Vaclav Treml, Frederick Reinig, Edurne Martinez del Castillo, Michal Rybnicek, Tomas Kolar, Miroslav Trnka
Summary: This study focuses on the hydrological summer extremes in the Morava River basin in Czech Republic, Danube Basin, Central Europe. By utilizing tree-ring network, the study reconstructs the variability of baseflow from 1745 to 2018 CE. The reconstructions indicate an increased variability of warm-season flow during the past 100 years, with extreme high and low flows occurring after the start of instrumental observations. The study also suggests that even lower flows could likely occur in the future considering the changing trends in baseflow.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)