Photosynthetic capacity, determined by light harvesting and carboxylation reactions, is a key plant trait that determines the rate of photosynthesis; however, in Earth System Models (ESMs) at a reference temperature, it is either a fixed value for a given plant functional type or derived from a linear function of leaf nitrogen content. In this study, we conducted a comprehensive analysis that c...

In vivo chlorophyll fluorescence associated to Photosystem II is being used to evaluate photosynthetic activity of microalgae grown in different types of photobioreactors; however, controversy on methodology is usual. Several recommendations on the use of chlorophyll fluorescence to estimate electron transport rate and productivity of microalgae grown in thin-layer cascade cultivators and metha...

To reveal the effects of ploidy level and haplotype on photosynthetic traits, we chose 175 genotypes of wild strawberries belonging to two haplotypes at two types of ploidy levels (diploidy and tetraploidy) and measured photosynthetic traits. Our results revealed that ploidy significantly affected the characteristics of light-response curves, CO2-response curves, and leaf gas exchange parameter...

Different depths within a metalimnetic layer of Oscillatoria rubescens were sampled, and changes in biochemical composition and photosynthetic rate were analyzed. Although differences in pigment and protein content were found, the photosynthetic rates of the samples were not significantly different.

Ultraviolet-B (UV-B) radiation and nitrogen are expected to increase simultaneously with future changes in global climate. In this study, growth and photosynthetic responses of Picea asperata seedlings to enhanced UV-B and to nitrogen supply were studied. The experimental design included two levels of UV-B treatments (ambient UV-B, 11.02 kJ m-2 d-1; enhanced UV-B, 14.33 kJ m-2 d-1) and two nitr...

In this article, we discuss the effects of long-term (17 months) aluminum (Al) treatment on the growth, root respiration rate, nutrient uptake rate, and photosynthetic activity of two-year-old Quercus serrata Thunb. seedlings. The seedlings were cultivated by supplying a nutrient solution with or without Al twice a week for 17 months in siliceous sand. After 5- and 17-month treatments, growth, ...

The net photosynthetic rate, chlorophyll content, chlorophyll fluorescence and 820 nm transmission were investigated to explore the behavior of the photosynthetic apparatus, including light absorption, energy transformation and the photoactivities of photosystem II (PSII) and photosystem I (PSI) during senescence in the stay-green inbred line of maize (Zea mays) Q319 and the quick-leaf-senescen...

in order to study the effects of ph and the ratio of nitrate to ammonium in nutrient solution, on the growth characteristics and on the yield of spinach (spinacia oleracea l.), a factorial experiment was conducted consisting of two factors including: nutrient solution ph in three levels (4.5, 6.5 and 8) and nitrate to ammonium ratio of nutrient solution in five levels (100:0, 75:25, 50:50, 25:7...

Aminooxyacetate induced excretion of glycolate from air-grown cells of Euglena gracilis in both air and 1% CO(2) atmospheres. The rate of the excretion reached 70% of the photosynthetic rate in the air on a carbon basis, and was 10% in 1% CO(2). The compulsory loss of photosynthetically fixed carbon as glycolate at the high rate in air in the presence of aminooxyacetate caused a decrease of the...

The results of the numerous measurements obtained during the last 40 years on gas exchange rate, photosynthetic carbon metabolism by exposition in ¹⁴CO₂ and activities of primary carbon fixation enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPC/O), in various wheat and soybean genotypes grown over a wide area in the field and contrasting in photosynthetic traits and productivity ar...