scholarly journals Effects of Phosphorus Level on Quality Traits and Quality-Related Enzymatic Activity in Lettuce

2021 ◽  
Author(s):  
Guang-Shu Ma ◽  
Hua Lian
Keyword(s):  
Ascorbic Acid ◽  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Plant Growth ◽  
Enzymatic Activity ◽  
Nitrate Content ◽  
Acid Oxidase ◽  
Quality Traits ◽  
Phosphorus Level ◽  
Related Enzyme

Abstract In this experiment, we studied the effects of the application of various amounts phosphorus on the quality traits and quality-related enzyme activity in lettuce. When we supplied lettuce with 0.3 mmol/L or 0.4 mmol/L phosphorus, the yield was higher than that of the control. In addition, the quality traits were better, the nitrate content was lower and the nitrate reductase, catalase and ascorbic acid oxidase activities were higher in these plants than in the control. In addition, the chlorophyll content was higher, and the root activity was stronger, in plants supplied with 0.3 or 0.4 mM/L phosphorus than in the control. These results suggest that the application of 0.3 or 0.4 mM/L phosphorus to lettuce is optimal for plant growth.

scholarly journals Morphophysiological, Enzymatic, and Elemental Activity in Greenhouse Tomato Saladette Seedlings from the Effect of Plant Growth-Promoting Rizobacteria

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1008
Author(s):  
Tomás Juan Álvaro Cervantes-Vázquez ◽  
Ana Alejandra Valenzuela-García ◽  
María Gabriela Cervantes-Vázquez ◽  
Tania Lizzeth Guzmán-Silos ◽  
Erika Lagunes Fortiz ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Plant Growth ◽  
Nutrient Solution ◽  
Stem Diameter ◽  
Production Costs ◽  
Abiotic Factor ◽  
Distilled Water ◽  
Plant Growth Promoting ◽  
Growth Promoting

The tomato is a widely cultivated and consumed vegetable globally. Comarca Lagunera is an important tomato-exporting region of Mexico. Salinity is an abiotic factor that reduces productivity and increases production costs. To advance growing period, there is high demand for the sustainable production of seedlings. Plant-growth-promoting rhizobacteria (PGPR) are characterized by improving plant growth through different mechanisms and can be an option for reducing the misuse of chemical fertilizers. The importance of the application of strains, evaluating various inoculation methods (in seed, soil, foliar spraying, and root immersion), should be evaluated to propose biofertilization packages in a specific crop. Thus, the study aimed to determine the effect of PGPR (Bacillus paralicheniformis, Acinetobacter guillouiae, Aeromonas caviae, and Pseudomonas lini) vs. nutrient solution and distilled water in the seedlings stage of saladette-type tomato on morphophysiological variables, nitrate reductase (NR) enzyme activity, and plant minerals via tissue analysis under greenhouse conditions. The four PGPR were inoculated by different methods (inoculation in seed, sprinkling, and both) in saladette-type tomato seedlings under greenhouse conditions and evaluated in vivo 40 days after sowing for morphophysiological variables, such as seedling height; stem diameter; root displaced volume; fresh and dry weight matter of the leaves, stems, and roots; leaf area; and nitrate reductase enzyme activity. The effect of the inoculation of PGPR showed significant results for Pseudomonas lini vs. the control, with 40% higher values, on average, for plant height, stem diameter, displaced root volume, and fresh weight of root, leaf, and stem. The response of enzymatic and mineral content in seedlings was variable with nutrient solution and significant with distilled water. Studies related to the promotion of plants in the subsequent phenological stages of a tomato, considering the selected PGPR, should be considered in future research.

scholarly journals Impact of Metal-Based Nanoparticles on Cambisol Microbial Functionality, Enzyme Activity, and Plant Growth

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2080
Author(s):  
Sergey Kolesnikov ◽  
Аlena Timoshenko ◽  
Tatiana Minnikova ◽  
Natalia Tsepina ◽  
Kamil Kazeev ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Seed Germination ◽  
Plant Growth ◽  
Enzymatic Activity ◽  
Contaminated Soils ◽  
Biological Properties ◽  
Significant Part ◽  
Critical Activity ◽  
Number Of Bacteria ◽  
Radish Seed

An increase in the penetration of metal-based nanoparticles (NPs) into the environment requires an assessment of their ecotoxicity as they impair the critical activity of plants, animals, bacteria, and enzymes. Therefore, the study aimed to observe the effects of metal-based NPs, including copper (Cu), nickel (Ni), and zinc (Zn), on the Cambisols, which cover a significant part of the earth's soil and play an important role in the biosphere. Metal-based NPs were introduced into the soil at concentrations of 100, 1,000, and 10,000 mg/kg. The biological properties of the soil are being investigated as the most sensitive to external contamination. The highest ecotoxicity of the studied pollutants introduced into the soil at the same concentrations was shown by Cu (up to 34%) and Zn (up to 30%) NPs, while Ni NPs showed less (up to 22%). Microbiological (total number of bacteria, Azotobacter sp. abundance) and phytotoxic properties (radish seed germination and length of roots) of Cambisols were more sensitive (22–53%) to pollution by NPs of Cu, Zn, and Ni, while enzymatic activity (catalase and dehydrogenases) showed less sensitivity (14–32%). The present results could be useful for biomonitoring the state of contaminated soils, especially by NPs.

Role of glucose cycloacetoacetate hydrolysate on tyrosine oxidation

1970 ◽  
Vol 48 (10) ◽  
pp. 1178-1180
Author(s):  
M. C. Nath ◽  
Idrees Bhai
Keyword(s):  
Ascorbic Acid ◽  
Enzyme Activity ◽  
Guinea Pigs ◽  
Acid Oxidase ◽  
Tyrosine Oxidation

In the livers of the scorbutic guinea pigs the activity of p-hydroxyphenylpyruvic acid oxidase was found to remain unchanged but profoundly reduced after the feeding of extra tyrosine. Glucose cycloacetoacetate hydrolysate, a reducing compound, when ingested simultaneously with tyrosine was found to prevent the reduction in the enzyme activity. This effect was comparable to that of ascorbic acid.

Notizen: Effect of Magnetic Field on Ascorbic Acid Oxidase Activity, I

1986 ◽  
Vol 41 (3) ◽  
pp. 355-358 ◽  
Author(s):  
V. S. Ghole ◽  
P. S. Damle ◽  
W. H.-P. Thiemann
Keyword(s):  
Magnetic Field ◽  
Ascorbic Acid ◽  
Homogeneous Magnetic Field ◽  
Acid Oxidase ◽  
High Substrate Concentration ◽  
Ascorbic Acid Oxidase ◽  
Rate Of Reaction ◽  
Substrate Concentrations ◽  
Burk Plot

A homogeneous magnetic field of 1.1 T strength exhibits a significant influence on the activity of the enzyme ascorbic acid oxidase in vitro. A Lineweaver-Burk plot of the reaction shows the typical pattern of a mixed-type inhibition, i.e. a larger rate of reaction at low substrate concentrations and a smaller rate of reaction at high substrate concentration than that of the control without magnetic field applied.

scholarly journals Is Ceruloplasmin an Ascorbic Acid Oxidase?

1962 ◽  
Vol 237 (11) ◽  
pp. 3455-3457
Author(s):  
Anatol G. Morell ◽  
Philip Aisen ◽  
I. Herbert Scheinberg
Keyword(s):  
Ascorbic Acid ◽  
Acid Oxidase ◽  
Ascorbic Acid Oxidase

CHANGES IN SUGAR LEVEL AND RELATED ENZYME ACTIVITY OF ARBUSCULAR MYCORRHIZAL ASPARAGUS

2002 ◽  
pp. 315-321
Author(s):  
M. Akiyama ◽  
T. Suzuki ◽  
K. Oosawa ◽  
I. Maezaki ◽  
N. Shiomi
Keyword(s):  
Enzyme Activity ◽  
Arbuscular Mycorrhizal ◽  
Related Enzyme
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