Photosynthetica - Ahead of Print
Speed of light-induced stomatal movement is not correlated to initial or final stomatal conductance in rice
Z. XIONG, Q.W. LUO, D.L. XIONG, K.H. CUI, S.B. PENG, J.L. HUANG
Photosynthetica X:X | DOI: 10.32615/ps.2022.013 
In nature, plants are often confronted with wide variations in light intensity, which may cause a massive carbon loss and water waste. Here, we investigated the response of photosynthetic rate and stomatal conductance to fluctuating light among ten rice genotypes and their influence on plant acclimation and intrinsic water-use efficiency (WUEi). Significant differences were observed in photosynthetic induction and stomatal kinetics across rice genotypes. However, no significant correlation was observed between steady-state and non-steady-state gas exchange. Genotypes with a greater range of steady-state and faster response rate of the gas...
Comparative PSII photochemistry of quinoa and maize under mild to severe drought stress
C. MALAN, J.M. BERNER
Photosynthetica X:X | DOI: 10.32615/ps.2022.022
Quinoa has been identified as a climate-resilient crop that can overcome unfavorable conditions. This study explores the photochemical efficiency of quinoa compared to maize subjected to drought stress. The JIP-test was used to assess the photochemical efficiency of both crops. Proline content, leaf water potential, and membrane leakage were also determined. The maximum photochemical efficiency (Fv/Fm) did not change for quinoa and maize under moderate stress. However, severe drought conditions resulted in a decline in Fv/Fm in maize but not quinoa. Furthermore, the PSII performance index (PIABS,total)...
Diurnal photosynthetic performance of two oak species from two provenances in a Mediterranean and a central European common garden
V. HOLLAND, N. REININGER, F. BANTIS, W. BRÜGGEMANN, K. RADOGLOU, M.N. FOTELLI
Photosynthetica X:X | DOI: 10.32615/ps.2022.023
Oaks may contribute to the stabilization of European forests under climate change. We utilized two common gardens established in contrasting growth regimes, in Greece (Olympiada) and Germany (Schwanheim), to compare the diurnal photosynthetic performance of a Greek and an Italian provenance of two Mediterranean oaks (Quercus pubescens and Q. frainetto) during the 2019 growing season. Although the higher radiation in the southern common garden led to a strong midday depression of chlorophyll a fluorescence parameters (maximum quantum efficiency of PSII, performance index on absorption basis), comparable light-saturated net photosynthetic...
Biochemical, gas exchange, and chlorophyll fluorescence analysis of maize genotypes under drought stress reveals important insights into their interaction and homeostasis
G.M. SINGH, S. GOLDBERG, D. SCHAEFER, F. ZHANG, S. SHARMA, V.K. MISHRA, J. XU
Photosynthetica X:X
Many studies have been conducted on maize to study the effect of drought on yield at the flowering stage, but understanding biochemical and photosynthetic response against drought at the seedling stage needs to be well established. Thus, to understand differential changes and interaction of biochemical and photosynthetic parameters at the seedling stage under drought, a greenhouse experiment with twelve maize genotypes under severe drought (30% field capacity) and irrigated (90-100% field capacity) conditions were performed. Drought differentially altered biochemical and photosynthetic parameters in all genotypes. A sharp increase in hydrogen peroxide,...
Photosynthetic efficiency of young Rhizophora mangle L. in a mangrove in southeastern Brazil
S.S. PASCOALINI, M.M.P. TOGNELLA, A.R. FALQUETO, M.L.G. SOARES
Photosynthetica X:X | DOI: 10.32615/ps.2022.025
The study proposes to evaluate the photosynthetic plasticity of Rhizophora mangle L. in four mangrove sites distributed along with the Great Vitória Estuarine System. The variation in organic matter content, which implies the higher essential nutrient availability, contributed to better energy flux performance related to electron transport. Furthermore, salinity damaged the reaction centers (RC), since the site with the highest salinity showed changes in the number and size of active photosynthetic RC and in the specific energy flows per active RC (absorption flux, trapped energy flux, and dissipated energy flux), but the plasticity of the species...
Bacon Ke (1920-2022): a pioneer of primary photochemistry of photosynthesis
G. GOVINDJEE, R. MALKIN, T. OGAWA
Photosynthetica X:X | DOI: 10.32615/ps.2022.026
Bacon Ke (26 July 1920–20 May 2022) was a physical chemist and an ingenious instrument designer whose work led to an in-depth understanding of the primary photochemistry of photosynthesis, while he worked at the Charles F. Kettering Research Laboratory in Yellow Springs, Ohio. He was a legend among the many luminaries in photosynthesis research.
László Mustárdy (1945-2022)
G. GARAB
Photosynthetica X:X | DOI: 10.32615/ps.2022.028
László Mustárdy, the former scientific adviser of the Biological Research Centre (BRC), Szeged, Hungary, died of cancer at the age of 77 on 20 April 2022.