Effect of N fertilizing on gas exchange, leaf photosynthetic performance and nutrient concentrations of Sweet Cherry cv. 0900 ziraat

Abstract

In this study, the effect of nitrogen (N) fertilization on gas exchange and the photosynthetic performance of cherry leaves were investigated. In the study, 4 different doses of N were applied from the soil, and N, P, K, Ca, Mg, Fe, Mn, Zn, and B concentrations were determined in leaf samples taken from the middle part of the shoots 65-70 days after full flowering. Assimilation rate (A), the concentration of intercellular CO2 (Ci), transpiration rate (Tr), stomatal conductance to water vapor (Gsw), total conductance to CO2 (Gtc), and total conductance to water vapor (Gtw) were measured simultaneously with leaf collection for mineral analysis. Leaf water use efficiency (WUE) and instantaneous carboxylation efficiency (ICE) were calculated. N fertilizing affected the leaf accumulation of some macro (N, P, K, Ca, and Mg) and micro (B) nutrients. As N doses increased, N content of leaf increased, while decreasing leaf P, K, and B contents. N fertilizing negatively affected Tr, A, Gsw, Gtw, Gtc, and ICE. While there were negative correlations between leaf N concentration and gas exchange and leaf photosynthetic performance, they were positive for P and K. It means that changes in gas exchange and leaf photosynthetic performance were not related to increasing leaf N concentration, but decreasing leaf K and/or P concentrations depending on N fertilizing.

Enhancing Sustainability in Potato Crop Production: Mitigating Greenhouse Gas Emissions and Nitrate Accumulation in Potato Tubers through Optimized Nitrogen Fertilization

“…N application rates and sources promoted diverse effects on gas exchange parameters [29,30]. The application of rates exceeding 110 and 91 kg N ha −1 for stomatal conductance and net photosynthetic rate, respectively, coupled with lower yields, indicates that an increase in N supply beyond the optimal rate disrupts physiological mechanisms, manifesting in diminished tuber biomass production.…”

Study on the effect of magnesium on leaf metabolites, growth and quality of tea tree

“…Further analysis revealed that 154 key metabolites (VIP >1) could distinguish M1, M2 and M3; 75 metabolites showed an increasing trend in content with an increase of Mg concentration (M1-M3), and the top 4 categories with the highest amount were saccharides (37.33%), nucleotides and derivatives (12.00%), organic acids (9.33%), and amino acids and derivatives (6.67%) (Figure 4A); whereas 79 of 154 key metabolites showed a decreasing trend in content, and the top 4 categories with the highest number were phenolic acids (26.58%), free fatty acids (11.39%), alkaloids (10.13%), and organic acids (10.13%) (Figure 4B). Mg is an important component of plant chlorophyll and pigment, which can promote plant photosynthesis and improve the synthesis of carbohydrate and amino acids (Huang et al, 2021;Ucģun et al, 2022). At the same time, Mg is beneficial to promote plant metabolism, improve plant cell division ability and promote plant growth (Pacheco et al, 2020).…”

“…Saccharides have been reported to be the main product of photosynthesis in plants, and an increase in saccharides content was beneficial to the enhancement of plant metabolism, which in turn increased plant growth rate, while nucleotides and derivatives could promote plant cell division and reproduction (Pacheco et al, 2020;Ucģun et al, 2022). Vitamins help protect plants from the harmful side effects of photosynthesis (S ̌ola et al, 2021).…”