scholarly journals Chlorophyll fluorescence in castor bean fertilized with castor cake and nickel

2020 ◽  
Vol 13 (4) ◽  
pp. 6
Author(s):  
S. O. Maia Júnior ◽  
R. S. Ferreira ◽  
L. F. Figueredo ◽  
J. R. Andrade ◽  
J. P. Pedroza
Keyword(s):  
Chlorophyll Fluorescence ◽  
Experimental Design ◽  
Castor Bean ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Capacity ◽  
Foliar Application ◽  
Bean Plants ◽  
3.0 T ◽  
Castor Cake ◽  
The City

The objective of this work was to evaluate the chlorophyll fluorescence of castor bean in response to fertilization with castor bean and nickel. The experiment was carried out in a protected environment at the Empresa Brasileira de Pesquisa Agropecuária, in the city of Campina Grande, Brazil. The experimental design was completely randomized, in factorial 4x4, with four doses of castor cake: 0; 1.0; 2.0 and 3.0 t ha-1 and four concentrations of Nickel: 0; 4.0; 8.0 and 12.0 mg L-1, with four replicates. At 60 and 85 days of cultivation was evaluated the chlorophyll fluorescence of the castor bean plants cv. BRS Energia. The Fv/Fm, Fv/Fo and Fo/Fm ratios were influenced by castor cake doses at 60 and 85 days. While foliar application of nickel at 60 days influenced only Fv/Fo, and at 80 days only Fo was not affected. Increasing castor cake doses reduces the photosynthetic efficiency of the castor bean plants, but does not damage the integrity of PSII. Foliar applications of nickel up to 12 mg L-1 increase the photosynthetic capacity of the castor bean at 85 days of cultivation.

scholarly journals Influence of Bacterial Inoculation on Photosynthetic Capacity, Mineral Uptake, Total Protein and Amino Acid Content of Maize (Zea mays) under Diesel Stress

2021 ◽  
Vol 25 (02) ◽  
pp. 530-538
Author(s):  
Ume Ummara
Keyword(s):  
Chlorophyll Fluorescence ◽  
Amino Acid ◽  
Contaminated Soil ◽  
Total Protein ◽  
Photosynthetic Efficiency ◽  
Photosynthetic Capacity ◽  
Bacterial Strains ◽  
Maize Crop ◽  
Maize Varieties ◽  
Acinetobacter Sp

This study was undertaken to explore the influence of diesel contaminated soil and bacterial consortium on photosynthetic efficiency, ion uptake, chlorophyll fluorescence, chlorophyll pigments, amino acids and total protein content of maize crop. The experiment was consisted of (a) two maize varieties (MMR1 yellow and Pearl white), (b) diesel levels (0, 1.5, 2.5, 3.5 g kg-1 soil) and (c) two bacterial strains inoculation levels, (non-inoculated) and inoculated with Pseudomonas aeruginosa BRRI54, Acinetobacter sp. ACRH80 and Acinetobacter sp. BRSI56 with completely randomized design having four replication The results exhibited that diesel contaminated soil decreased photosynthetic efficiency, photosynthetic pigments i-e., „a‟, „b, carotenoids, chlorophyll fluorescence and k+ content, however, there is increase in amino acid accumulation, total protein and Na+ uptake. But inoculation of different bacterial strains enhanced the photosynthetic capacity of PSII, quantum yield (Fv/Fm), K+ uptake as compared to non-inoculated group along with hydrocarbon stress. The marginal lands contaminated with diesel oil could be ameliorated with inoculation of bacterial strains, which are highly adapted to various farming systems. The maize crop could be successively grown on polluted soil which are contaminated with poly aromatic hydrocarbons. The small holding farming families will be greatly benefited to improve their crop yields. © 2021 Friends Science Publishers

DROUGHT-INDUCED CHANGES IN CHLOROPHYLL FLUORESCENCE OF YOUNG BEAN PLANTS

2010 ◽  
Vol II (4) ◽  
pp. 75-79 ◽  
Author(s):  
Zlatko Zlatev ◽  
Andon Vassilev ◽  
Vasilii Goltsev ◽  
Georgi Popov
Keyword(s):  
Chlorophyll Fluorescence ◽  
Bean Plants ◽  
Induced Changes

Silicon dioxide nanofertilizers improve photosynthetic capacity of two Criollo cocoa clones (Theobroma cacao L.)

2021 ◽  
pp. 1-18
Author(s):  
Pedro Gómez-Vera ◽  
Héctor Blanco-Flores ◽  
Ana Marta Francisco ◽  
Jimmy Castillo ◽  
Wilmer Tezara
Keyword(s):  
Silicon Dioxide ◽  
Physiological Response ◽  
Photosynthetic Capacity ◽  
Foliar Application ◽  
Photosynthetic Pigment ◽  
Photochemical Activity ◽  
Total Soluble Protein ◽  
Nutrient Contents ◽  
Use Efficiency ◽  
Positive Effect

Summary Studies on the effect of nanofertilizers (NF) in physiological performance of plants is scarce, especially that related to substances encapsulated into silicon dioxide (SiO2) nanoparticles in cocoa plants. The effect of foliar application of SiO2-NF on nutrient contents, gas exchange, photochemical activity, photosynthetic pigments, total soluble protein (TSP), photosynthetic nitrogen use efficiency (PNUE), and growth in seedlings of two cocoa clones (OC-61 and BR-05) in a greenhouse was assessed. Spraying with SiO2-NF increased net photosynthetic rate (A) by 16 and 60% and electron transport rate (J) by 52 and 162% in clones OC-61 and BR-05, respectively, without changes in photosynthetic pigment concentration in either clone. The SiO2-NF caused a decrease of 37 and 22% in stomatal conductance in OC-61 and BR-05, respectively; a similar trend was observed in transpiration rate, causing an increase of 42 and 100% in water use efficiency in OC-61 and BR-05, respectively. In both clones, diameter of graft increased on average 28% with SiO2-NF. Higher photosynthetic capacity was related to an increase in leaf N, P, and TSP. A significant reduction in PNUE (A/N ratio) was found in OC-61, whereas in BR-05 PNUE increased after spraying with SiO2-NF. Overall, spraying with SiO2-NF had a positive effect on photosynthetic processes in both cocoa clones, associated with an increase in nutrients content, which translated into improved growth. A differential physiological response to spraying with SiO2-NF between clones was also found, with BR-05 being the clone with a better physiological response during the establishment and development stages.

scholarly journals Soil Application of Effective Microorganisms (EM) Maintains Leaf Photosynthetic Efficiency, Increases Seed Yield and Quality Traits of Bean (Phaseolus vulgaris L.) Plants Grown on Different Substrates

2019 ◽  
Vol 20 (9) ◽  
pp. 2327 ◽  
Author(s):  
Marcello Iriti ◽  
Alessio Scarafoni ◽  
Simon Pierce ◽  
Giulia Castorina ◽  
Sara Vitalini
Keyword(s):  
Phaseolus Vulgaris ◽  
Photosystem Ii ◽  
Sandy Soil ◽  
Photosynthetic Efficiency ◽  
Quality Traits ◽  
Phaseolus Vulgaris L ◽  
Effective Microorganisms ◽  
Yield And Quality ◽  
Bean Plants

EM (effective microorganisms) is a biofertilizer consisting of a mixed culture of potentially beneficial microorganisms. In this study, we investigated the effects of EM treatment on leaf in vivo chlorophyll a fluorescence of photosystem II (PSII), yield, and macronutrient content of bean plants grown on different substrates (nutrient rich substrate vs. nutrient poor sandy soil) in controlled environmental conditions (pot experiment in greenhouse). EM-treated plants maintained optimum leaf photosynthetic efficiency two weeks longer than the control plants, and increased yield independent of substrate. The levels of seed nutritionally-relevant molecules (proteins, lipids, and starch) were only slightly modified, apart from the protein content, which increased in plants grown in sandy soil. Although EM can be considered a promising and environmentally friendly technology for sustainable agriculture, more studies are needed to elucidate the mechanism(s) of action of EM, as well as its efficacy under open field conditions.

Crown structure of a codominant Douglas-fir

1983 ◽  
Vol 13 (2) ◽  
pp. 264-269 ◽  
Author(s):  
Edward C. Jensen ◽  
James N. Long
Keyword(s):  
Photosynthetic Efficiency ◽  
Photosynthetic Capacity ◽  
Basic Structure ◽  
Douglas Fir ◽  
Intensive Study ◽  
Crown Structure

Results are presented from an intensive study of crown structure in a 39-year-old codominant Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco). The patterns of crown development observed may represent a species adaptation for maximizing photosynthetic efficiency. While branches originating at nodes provide the basic structure of the crown, short-lived nonnodal branches provide much of the photosynthetic capacity. In addition, nonnodal branches support nearly half of the young needles near the top and outside edges of the crown.

scholarly journals Doses and times of nitrogen application via leaf in the production of corn for silage in the Southern Amazon

2021 ◽  
Vol 38 (2) ◽  
pp. 21-260
Author(s):  
Fellipe Lemes da Rosa ◽  
Oscar Mitsuo Yamashita ◽  
Marco Camillo de Carvalho ◽  
Rivanildo Dallacort ◽  
Adriano Maltezo da Rocha ◽  
...  
Keyword(s):  
Experimental Design ◽  
Foliar Application ◽  
Brazilian Amazon ◽  
Nitrogen Application ◽  
Soil Fertilization ◽  
Foliar Nitrogen ◽  
Production Factors ◽  
N Rates ◽  
Leaf Fertilizer ◽  
Different Doses

The objective was to evaluate the application of foliar nitrogen in different doses and times, as a complement to soil fertilization. The work was conducted in a rural area of the municipality of Terra Nova do Norte – MT, located in the southern of brazilian Amazon. The treatments were a combination of foliar applications of nitrogen at doses of 0, 250, 500 and 750 mL.ha-1, and two application times with different intervals: 15 and 40 days after emergence; and 25 and 40 days after the emergency. The experimental design was a randomized block with four replications, in a factorial 4 x 2, totaling eight treatments. It was found that the variables green mass productivity and dried plant and ear and ear length responded positively as the N rates and application times. It was also observed that the foliar application of nitrogen increased the productivity of corn for silage, and better results are obtained from 750 mL.ha-1 of the studied leaf fertilizer. There was no increase in production factors when the foliar application of nitrogen was split.

Decreased photosynthetic efficiency in plant species exposed to multiple airborne pollutants along the Russian-Norwegian border

2000 ◽  
Vol 78 (8) ◽  
pp. 1021-1033 ◽  
Author(s):  
Ann Marie Odasz-Albrigtsen ◽  
Hans Tømmervik ◽  
Patrick Murphy
Keyword(s):  
Chlorophyll Fluorescence ◽  
Plant Species ◽  
Photosynthetic Efficiency ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Plant Cover ◽  
Mixed Forest ◽  
Airborne Pollutants ◽  
Fluorescence Measurements ◽  
Study Sites

Photosynthetic efficiency was estimated by chlorophyll fluorescence measurements (Fv/Fm) in 11 plant species growing along a steep gradient of airborne pollution along the Russian-Norwegian border (70°N, 30°E). Photosynthetic efficiency was positively correlated with environmental variables including annual temperature and a maritime gradient and was negatively correlated with the airborne concentrations of Cu, Ni, and SO2 from the Cu-Ni smelters. Photosynthetic efficiency in six plant species from the mixed forest, but not pine (Pinus sylvestris L.), and three species from the birch forest was inversely correlated with SO2 and the concentrations of Ni and Cu in lichens. Measurement of fluorescence in these species was a sensitive indicator of pollutant impact. Plant cover at the 16 study sites and the photosynthetic efficiency of five target species correlated with normalized difference vegetation index (NDVI) values. This study demonstrated that it is possible to detect relations among field-measured ecophysiological responses in plants, levels of airborne pollutants, and satellite remote-sensed data.Key words: chlorophyll fluorescence, smelters, sulfur dioxide, nickel, copper, normalized difference vegetation index (NDVI).

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