Photosynthetica, 2020 (vol. 58), issue 1
Inhibition of photosynthesis in cucumber leaves by oxybenzone
X. ZHONG, Y.T. LI, Z.S. ZHANG, S.H. LI, Y.M. LI, B.B. LIU, Q.M. LI, H.Y. GAO
Photosynthetica 2020, 58(1):1-8 | DOI: 10.32615/ps.2019.135 
Oxybenzone (OBZ), a popular additive in sunscreen, can protect human skin by blocking ultraviolet (UV) rays from the sun (Baker et al. 2015). In addition to being used in sunscreens, OBZ is also widely used in perfumes, shampoos, lip balms, and other pharmaceuticals and personal care products (PPCPs) (Aguirre et al. 1992, Emonet et al. 2001, Kasichayanula et al. 2007). OBZ can enter rivers, lakes, groundwater, sewage, and so on through human activities and was identified as an 'emerging environmental pollutant' by the Environmental Protection Agency of the USA (Rodil et al. 2012, Agüera et al. 2013). With...
Photosynthetic characteristics and chlorophyll a fluorescence induction parameters in elite clone (GS1) of Pinus sylvestris var. mongolica
P. MENG, G.C. YOU
Photosynthetica 2020, 58(1):9-18 | DOI: 10.32615/ps.2019.133
We selected the elite clone of Pinus sylvestris var. mongolica 'GS1' from 365 clones in a primary seed orchard in Liaoning Province, China. To understand the photosynthesis characteristics and mechanisms, 40-year-old 'GS1' trees were compared with a common clone 'H524' of the same age at the same seed orchard. Results showed that 'GS1' had higher net photosynthetic rate because of higher stomatal conductance (gs); the larger external and inner diameters of stomata were the structural factors enabling maintenance of higher gs. The higher light-saturated net photosynthetic rate of 'GS1' was mainly due...
Leaf photosynthetic light response of summer maize: comparison of models and analysis of parameters
T.T. ZHU, J. LI, Y.Y. LIU, X.J. TONG, Q. YU
Photosynthetica 2020, 58(1):19-28 | DOI: 10.32615/ps.2019.134
An experiment was performed in order to study the applicability of light-response models for summer maize (Zea mays L.) by using rectangular hyperbola model, nonrectangular hyperbola model, exponential model, binomial regression model, and modified rectangular hyperbola model (Ye model), respectively. Our results showed that the fitted effect of Ye model was best and photosynthetic parameters were closest to the observation. The photoinhibition coefficient was significantly negatively correlated with the light-saturation point (Is), the light-saturation coefficient (γ), and maximum net photosynthetic rate at light-saturation...
Photosynthesis, growth, and yield of Paeonia ostii in tree-based agroforestry systems
Y.ZH. YANG, ZH.H. ZHANG, G.X. WANG, Y.Y. YANG, H. GUO
Photosynthetica 2020, 58(1):29-36 | DOI: 10.32615/ps.2019.139
Paeonia ostii T. Hong & J.X. Zhang, an emerging oil crop, was intercropped with 3-year-old plantations of pawpaw [Chaenomeles sinensis (Thouin.) Koehne], Chinese toon (Toona sinensis Roem.), and walnut (Juglans regia L.). In order to achieve a better production system, we studied the effects of intercropping on the photosynthesis, growth, and yield of P. ostii. The results showed that different pattern of agroforestry systems changed microclimatic and growing site conditions in comparison to the control treatment. The correlation analysis demonstrated that both similarities and differences were found in relationship...
Ultraviolet (UV) B effects on growth and yield of three contrasting sweet potato cultivars
Z. CHEN, W. GAO, K.R. REDDY, M. CHEN, S. TADURI, S.L. MEYERS, M.W. SHANKLE
Photosynthetica 2020, 58(1):37-44 | DOI: 10.32615/ps.2019.137
Ground-level UV-B will stay at a high level in the next several decades and influence sweet potato growth and yield because of the remaining chlorofluorocarbons in the atmosphere. The study explored three UV-B (none, ambient, and elevated/projected) levels on three contrasting sweet potato cultivars (Beauregard, Hatteras, and Louisiana 1188) using sunlit plant growth chambers at Mississippi State University. The results showed that UV-B influenced three cultivars differently. Growth, photosynthetic rate, epidermal and leaf structure of Beauregard were negatively influenced under ambient and elevated UV-B. On the contrary, Hatteras was positively influenced,...
Photosynthetic activity of common buckwheat (Fagopyrum esculentum Moench) exposed to thermal stress
M. HORNYÁK, A. PŁAŻEK, P. KOPEĆ, M. DZIURKA, J. PASTUSZAK, A. SZCZERBA, T. HURA
Photosynthetica 2020, 58(1):45-53 | DOI: 10.32615/ps.2019.140
The aim of the work was to investigate thermal stress effect on photosynthetic activity of common buckwheat. Seedlings of common buckwheat were exposed to 20°C (control) and 30°C (thermal stress). The research involved the Polish cultivar 'Panda' and strain PA15 and determined kinetics of chlorophyll a fluorescence (Chlf), leaf gas exchange, soluble carbohydrate (SC) content in donor leaves, electrolyte leakage as a parameter of cell membrane permeability, and amount of abscisic acid and jasmonates. In 'Panda' and PA15 plants grown at 30°C, most of Chlf parameters improved. 'Panda' plants grown at 30°C demonstrated a higher increase in...
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa
L. LI, X.L. PAN, G.J. MU
Photosynthetica 2020, 58(1):54-60 | DOI: 10.32615/ps.2019.155
Effects of potassium permanganate (KMnO4) on PSII of Mycrocystis aeruginosa were investigated by measuring the chlorophyll fluorescence in vivo. KMnO4 exposure reduced the rate of oxygen evolution and cell growth. High concentration of KMnO4 (10 mg L-1) decreased the fast phase and increased the slow phase of QA- reoxidation kinetics. Electron transport after QA was blocked, resulting in a considerable amount of QA- reoxidation being performed via S2(QAQB)- charge recombination. KMnO4...
Exogenous spermidine enhances salt-stressed rice photosynthetic performance by stabilizing structure and function of chloroplastand thylakoid membranes
D.X. JIANG, X. CHU, M. LI, J.J. HOU, X. TONG, Z.P. GAO, G.X. CHEN
Photosynthetica 2020, 58(1):61-71 | DOI: 10.32615/ps.2019.160
Spermidine (Spd) is a ubiquitous low-molecular-mass aliphatic amine that acts in abiotic stress tolerance in plants. We investigated how the treatment with exogenous Spd contributed to the protection against salt stress in rice chloroplasts. Analysis of the chlorophyll (Chl) fluorescence showed that there were many negative effects of salinity on different sites of the photosynthetic machinery; however, these were alleviated by adding Spd. Spd prevented the damage of structure and function of chloroplasts under salt stress; thylakoid membrane protein components and photosynthetic pigments were not severely affected by salinity in Spd-treated plants....
N-glycosylation regulates photosynthetic efficiency of Arabidopsis thaliana
Q.-S. JIAO, G.-T. NIU, F.-F. WANG, J.-Y. DONG, T.-S. CHEN, C.-F. ZHOU, Z. HONG
Photosynthetica 2020, 58(1):72-79 | DOI: 10.32615/ps.2019.153
N-glycosylation is one of the most important protein modifications in eukaryotes. It has been well established that N-glycosylation plays multiple roles in regulating stress tolerance of plants. However, the effects and mechanism of N-glycosylation on photosynthesis have not been well understood. In the present study, an obvious decrease in photosynthetic capacity and dry mass were detected in alg3-3 and cgl1-1, two typical mutants in N-glycosylation process. The maximal photochemical efficiency of PSII decreased significantly in cgl1-1. The values of effective quantum yield of PSII photochemistry, rate of photosynthetic electron...
Nitric oxide participates in the regulation of ascorbate-glutathione cycle and water physiological characteristics of Arabidopsis thaliana by NaHS
C.J. SHAN, Y.Y. JIN, Y. ZHOU, H. LI
Photosynthetica 2020, 58(1):80-86 | DOI: 10.32615/ps.2019.158
We investigated the role of nitric oxide (NO) in the regulation of ascorbate-glutathione (AsA-GSH) cycle and water physiological characteristics of Arabidopsis thaliana by sodium hydrosulfide (NaHS). NaHS markedly increased the contents of H2S, NO, chlorophyll (Chl), and carotenoids, the activity of AsA-GSH cycle, ascorbate/dehydroascorbate ratio, net photosynthetic rate, Chl fluorescence parameters, transpiration rate, stomatal conductance, and relative water content in leaves and the biomass of wild-type Arabidopsis. However, NaHS markedly decreased malondialdehyde content and electrolytic leakage. Except H2S,...
Different responses of photosystem and antioxidant defense system to three environmental stresses in wheat seedlings
N. WU, H.T. MAO, M.Y. CHEN, J. DONG, M. YUAN, Z.W. ZHANG, S. YUAN, H.Y. ZHANG, Y.E. CHEN
Photosynthetica 2020, 58(1):87-99 | DOI: 10.32615/ps.2019.156
To investigate the adaptive mechanism of wheat under high light, osmotic stress, and salt stress, redox regulation, and photosynthesis were compared. Under high light, the activities of antioxidant enzymes, except for catalase, significantly increased and then decreased after 1 and 3 h, respectively. Under osmotic stress, antioxidant enzyme activities significantly increased and subsequently declined. Except for superoxide dismutase, salt stress induced a significant increase in all the antioxidant enzyme activities. A significant decrease of D1 protein by high light and osmotic stress, strong photophosphorylation of D1 and D2 under high light and...
Triadimefon increases drought tolerance through the regulation of photosynthesis and carbohydrate metabolism in rapeseed at bolting stage
F. WANG, F. ZHONG, S. ZHANG, P. ZHANG, F. CHEN, W. LI, S. ZHANG, H. JIANG
Photosynthetica 2020, 58(1):100-109 | DOI: 10.32615/ps.2019.141
Drought is a major abiotic factor limiting agricultural crop production. The focus of this study was the effect of triadimefon (TDM) on rapeseed photosynthesis and carbohydrate metabolism in response to drought stress. Results showed that TDM increased plant dry mass per plant and reduced the damage to photosynthetic processes by regulating stomatal and nonstomatal factors, inducing photosynthetic pigment synthesis, and improving photosynthetic activity. Chloroplast degradation and senescence was reduced in rapeseed leaves with TDM under drought stress. TDM restored structural connections between chloroplasts and cell membranes and modified the chloroplasts...
Co-author and co-cited reference network analysis for chlorophyll fluorescence research from 1991 to 2018
K. HU, G. GOVINDJEE, J. TAN, Q. XIA, Z. DAI, Y. GUO
Photosynthetica 2020, 58(1):110-124 | DOI: 10.32615/ps.2019.154
Chlorophyll a fluorescence has been extensively used in studying photosynthesis and overall physiology of plants, algae, and cyanobacteria. As a research hotspot, a large number of papers have been published. This creates a challenge for beginning researchers to gain a holistic view of co-author and co-cited reference network by reading individual publications. Further, these scientists need to understand the research trends in the field. Scientometric analysis, a method for mining publication datasets, was therefore conducted to analyze the co-author and co-cited reference network in the area of chlorophyll fluorescence research. The countries...
Changes in photosynthesis and carotenoid composition of pepper (Capsicum annuum L.) in response to low-light stress and low temperature combined with low-light stress
J.F. ZHANG, J. LI, J.M. XIE, J.H YU, M.M. DAWUDA, J. LYV, Z.Q. TANG, J. ZHANG, X.D. ZHANG, C.N. TANG
Photosynthetica 2020, 58(1):125-136 | DOI: 10.32615/ps.2019.175
Light and temperature are two major factors for plant growth. Carotenoids are important photoprotective and light-harvesting pigments in photosynthetic organs. Therefore, this study explored photosynthesis and carotenoid-related metabolism under control (CK), low-light (L), and low-temperature and low-light (LL) conditions by using the pepper (Capsicum annuum L.) varieties Longjiao 5 and Hangjiao 4. We found the increased inhibition of plant growth and photosynthetic capacity under both L and LL stress. Meanwhile, carotenoid-related metabolic compounds accumulated in pepper showed different responses to the two stresses. Significantly, zeaxanthin...
Effects of exogenous cytokinin on photosynthesis, senescence, and yield performance of inferior rice tillers grown under different nitrogen regimes
Y. WANG, J.W. LU, T. REN, P.F. LI, Q.X. LIU, X.K. LI
Photosynthetica 2020, 58(1):137-145 | DOI: 10.32615/ps.2019.170
Inferior tillers contribute negligibly to rice grain yields as their late occurrence or prematurity curtails growth. However, 6-benzylaminopurine (6-BA, a synthetic cytokinin) can delay tiller senescence. Our results indicate that foliar application of 6-BA enhanced the distribution and allocation of light energy for the photochemical reactions of PSII, under appropriate N supply. The percentage of thermal energy dissipation also decreased following the application of 6-BA as a consequence of the reduced risk of chloroplast oxidative damage through excess excitations. Moreover, leaf peroxidase, catalase, and ascorbate peroxidase activities were augmented...
High humidity alleviates photosynthetic inhibition and oxidative damage of tomato seedlings under heat stress
C. XU, Z.Q. YANG, S.Q. YANG, L. WANG, M.T. WANG
Photosynthetica 2020, 58(1):146-155 | DOI: 10.32615/ps.2019.168
This study investigated the effects of high humidity on the growth and photosynthetic and physiology traits of tomato plants under high temperature stress (HT). The results showed that high humidity effectively alleviated the limitation of HT on plant growth and increased the root-to-shoot ratio. In addition, high humidity also increased the chlorophyll content, net photosynthetic rate, and maximum photochemical quantum yield of PSII in tomato seedlings under HT stress, but declined the stomatal limitation value. Moreover, JIP-test showed that increasing air humidity improved the quantum yields and efficiencies of HT-stressed tomato plants and increased...
Low temperature and low irradiation induced irreversible damage of strawberry seedlings
C. XU, M.T. WANG, Z.Q. YANG, Q.T. ZHENG
Photosynthetica 2020, 58(1):156-164 | DOI: 10.32615/ps.2020.001
Low temperature (LT) and low irradiation (LI) are common factors posing a great risk to plants. The study aimed to elucidate the effects of LT and LI and recovery on the photosynthetic apparatus, photoinhibition of PSII, and reactive oxygen metabolism of strawberry seedlings. The results showed that strawberry growth slowed down or even stopped and total chlorophyll content, stomatal conductance, net photosynthetic rate, and maximal quantum yield of PSII photochemistry decreased, while intercellular CO2 concentration increased under LI, LT, and combined stress (LL). Additionally, JIP-test showed that compared to LI or LT stress, LL-stressed...
Lanthanum chloride enhances the photosynthetic characteristics and increases konjac glucomannan contents in Amorphophallus sinensis Belval
X.X. LI, B. YU, Y.Y. DONG, L.S. WANG, S.L. ZHANG, H.Y. SHANGGUAN, Z.H. HE, X.M. LUO, P.F. LAI
Photosynthetica 2020, 58(1):165-173 | DOI: 10.32615/ps.2019.184
Lanthanum (La) has been used as agricultural inputs in order to enhance yield and improve crop quality. However, little is known about the effect of La on the photosynthesis and growth of Amorphophallus sinensis, a worldwide food source. The effects of La on the photosynthetic and chlorophyll fluorescence parameters, photosynthetic pigments, corm yield, and konjac glucomannan (KGM) of Amorphophallus sinensis were investigated via field experiments. The leaves were sprayed with different concentrations of LaCl3 (20, 80, 160, and 240 mg L-1). The results exhibited an increasing effect of LaCl3 on...
Photosynthetic and physiological responses of small seeded faba bean genotypes (Vicia faba L.) to salinity stress: identification of a contrasting pair towards salinity
I. RAJHI, S. BEN MOUSSA, I. NEJI, B. BACCOURI, M. BEN CHIKHA, C. CHAMMAKHI, M. AMRI, R. BROUQUISSE, H. MHADHBI
Photosynthetica 2020, 58(1):174-185 | DOI: 10.32615/ps.2019.152
In this study, we examined the behavior of six faba bean (Vicia faba L.) genotypes under salinity conditions at the seedling stage. The evaluation was assessed using 21 morphological, physiological, and photosynthetic traits under control, moderate, and severe salinity conditions. The principal component analysis (PCA) was used to identify genotypes of contrasting behavior in response to salt stress and to characterize the important traits for salt tolerance. The result of PCA analysis showed that the genotypes displayed different behavior under the saline conditions. The most discriminating quantitative characters were related to plant biomass...