scholarly journals nfluence of reducing and oxidizing compounds and of the redox potential of the medium on the biomass of Scenedesmus quadricauda (Turp.) Breb.

2014 ◽  
Vol 53 (2) ◽  
pp. 223-235 ◽  
Author(s):  
Stefan Gumiński ◽  
Krystyna Jurajda ◽  
Ewa Tatkowska
Keyword(s):  
Ascorbic Acid ◽  
Redox Potential ◽  
Dry Weight ◽  
Reducing Agents ◽  
Scenedesmus Quadricauda ◽  
Oxidizing Agents ◽  
Weight Increment ◽  
Total Dry Weight

The influence was investigated of several concentrations of the reducing agents: cysteine, glutathione, ascorbic acid, pyracatechol and of the oxidizing agents: KMnO<sub>4</sub>, K<sub>4</sub>Cr<sub>2</sub>O<sub>7</sub> and H<sub>2</sub>O<sub>2</sub> on the total dry weight increment and that of protein with reference to redox potential changes of the medium in <em>Scenedesmus quadricauda</em> cultures. The culture was run in a photothermostat. It was found that the reducing compounds had as a rule a stimulating influence under 24-h illumdnation, whereas the oxidilzing agents gave the same effect when a period of 7-h darkness was applied within 24 h.

scholarly journals The potential application of fungus Trichoderma harzianum Rifai in biodegradation of detergent and industry

2015 ◽  
Vol 21 (1-1) ◽  
pp. 131-139 ◽  
Author(s):  
Violeta Jakovljevic ◽  
Jelica Stojanovic ◽  
Miroslav Vrvic
Keyword(s):  
Redox Potential ◽  
Trichoderma Harzianum ◽  
Potential Application ◽  
Ph Value ◽  
Fermentation Broth ◽  
Fungal Growth ◽  
Dry Weight ◽  
Invertase Activity ◽  
Acid Invertase ◽  
Total Dry Weight

The potential application of fungus Trichoderma harzianum Rifai in biodegradation of commercial detergent (MERIX, Henkel, Serbia) was in the focus of this study. The fungus was isolated from wastewater samples of the Rasina River, downstream where the industrial wastewaters of factory Henkel (Krusevac, Serbia) discharge into river. The fungus was cultivated in liquid growth medium by Czapek with addition of detergent at a concentration of 0.3% during 16 days. Analysis of fermentation broth evaluated the chemical and biochemical changes of pH, redox potential, activity of alkaline and acid invertase as well as activity of alkaline protease. In addition, the influence of detergent on fungal growth and total dry weight biomass was determined. At the same time, detergent disappearance in terms of methylene blue active substances in the medium was measured. The detergent at a concentration of 0.3% influenced significant decrease of pH value and increase of redox potential. The detergent showed inhibitory effect on acid invertase activity and stimulatory effect on alkaline invertase and protease activity. The fungus decomposed about 74.24% of tested detergent during 16 days, but total dry weight biomass reduced about 20% in relation to control.

scholarly journals Ameliorative effect of Ascorbic acid and biochar on Growth, and antioxidant enzymes on early Seedling of Sorghum under Salinity Conditions

2021 ◽  
Author(s):  
Aboagla Elsiddig ◽  
Guisheng Zhou ◽  
Nimir Ahmed
Keyword(s):  
Ascorbic Acid ◽  
Antioxidant Enzymes ◽  
Root Length ◽  
Specific Root Length ◽  
Dry Weight ◽  
Controlled Study ◽  
Emergence Rate ◽  
Sorghum Seedling ◽  
Physiological Attributes ◽  
Total Dry Weight

Abstract Salt stress is one of the major environmental stresses that limits the growth, antioxidant defense and sustainable crop productivity. A controlled study was done to determine the ameliorative effects of ascorbic acid (ASA) (0, 568, and 850 μM) and biochar (BC) (0, 2 and 4% BC [w/w]) on emergence, growth, and physiological attributes of sorghum grown under three salinity levels (0, 100, and 200 mM NaCl). High salinity stress significantly reduced emergence percentage, emergence rate, shoot length, root length, specific root length, total fresh weight (T.F.W), total dry weight (T.D.W), the activities of peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), but increased malondialdehyde (MDA) content. At the 200 mM NaCl level, 850 μM ASA with 4% BC enhanced most of the physiological attributes determined. At the 200 mM salinity level, total dry weight of sorghum seedling was increased by 42.7% and 23.1% at 2% and 4% BC levels, respectively as compared with non-BC control. The highest emergence rate at 200 mM NaCl was achieved at 4% BC and 850 μM ASA level. Our study suggested that the combined application of ASA and BC at appropriate amount and concentration on sorghum seedling may be helpful in salt tolerance and getting increase antioxidant enzymes that mitigate harms affected by saline problems worldwide.

scholarly journals Influence of detergent and its components on metabolism of Fusarium oxysporum in submerged fermentation

2014 ◽  
Vol 68 (4) ◽  
pp. 465-473 ◽  
Author(s):  
Violeta Jakovljevic ◽  
Jasmina Milicevic ◽  
Jelica Stojanovic ◽  
Slavica Solujic ◽  
Miroslav Vrvic
Keyword(s):  
Organic Acids ◽  
Redox Potential ◽  
Fusarium Oxysporum ◽  
Proteolytic Activity ◽  
Metabolic Activity ◽  
Biochemical Parameters ◽  
Oleyl Alcohol ◽  
Sodium Tripolyphosphate ◽  
Dry Weight ◽  
Total Dry Weight

The influence of detergent and its components (sodium tripolyphosphate and ethoxylated cetyl oleyl alcohol) at 0.1 % concentration on the enzymatic and metabolic activity of Fusarium oxysporum during exponential growth was investigated in this paper. The fungus Fusarium oxysporum was isolated from wastewater originating from households which contain detergent. The following biochemical parameters were analyzed: pH, redox potential, proteolytic activity, production of carbohydrates, free and total organic acids, proteins and total dry weight biomass. The detergent had influence on the significant decreasing of redox potential, slight increasing of pH and quantity of glucose and total organic acids, while the proteolytic activity was triple insensive in relation to control. The sodium tripolyphosphate had influence on the slight decreasing of pH, significant increasing of redox potential and quantity of glucose and free and total organic acids, whereas the proteolytic activity was intsensive only 5th and 6th day. The total dry weight biomass of the fungus F. oxysporum was slightly inhibited by ethoxylated alcohol but significantly inhibited by detergent and sodium tripolyphosphate.

BIOASSAY OF PROLACTIN

1969 ◽  
Vol 60 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Charles S. Nicoll
Keyword(s):  
Epithelial Cells ◽  
Lipid Content ◽  
Dry Weight ◽  
Fat Content ◽  
Assay Sensitivity ◽  
Mucosal Epithelium ◽  
Wet Weight ◽  
Total Dry Weight

ABSTRACT The response of the pigeon crop-sac to systemically acting prolactin (injected subcutaneously) was evaluated by measuring the wet weight of the responsive lateral lobes of the organ and by determining the dry weight of a 4 cm diameter disc of mucosal epithelium taken from one hemicrop. Of several different injection schedules tested, administration of prolactin in four daily injections was found to yield optimal responses. When compared with a graded series of prolactin doses, measurement of the mucosal dry weight proved to be a better method of response quantification than determination of the crop-sac wet weight with respect to both assay sensitivity and precision. The submucosal tissue of the crop-sac was estimated to constitute about 64 % of the total dry weight of the unstimulated organ and it was found to be relatively unresponsive to prolactin stimulation in comparison with the mucosa. The lipid content of the mucosal epithelium was determined using unstimulated crop-sacs or tissues which showed varying degrees of prolactin-induced proliferation. The fat content of the mucosal epithelial cells increased only slightly more rapidly than the dry weight or the defatted dry weight of the mucosa. Suggestions are made for the further improvement of the systemic crop-sac assay for prolactin.

Impact of an Open Trellis on Canopy Growth, Light Interception, Yield, and Leaf Physiology of Red Raspberry (Rubus idaeus)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 468b-468
Author(s):  
Stephen F. Klauer ◽  
J. Scott Cameron ◽  
Chuhe Chen
Keyword(s):  
Leaf Area ◽  
Total Nitrogen ◽  
Dry Weight ◽  
Light Interception ◽  
Rubus Idaeus ◽  
Above Ground Biomass ◽  
Red Raspberry ◽  
Leaf Physiology ◽  
Total Dry Weight ◽  
Upper Third

After promising results were obtained with an open-style split trellis (two top wires) in its initial year, two new trials were established in 1997 in northwest (Lynden) and southwest (Woodland) Washington. For the split trellis, actual yields were 33% (machine-picked 1/2 season) and 17% (hand-picked) greater, respectively, for the two locations compared to the conventional trellis (one top wire). In Woodland, canes from the split trellis had 33% more berries, 55% more laterals, 69% more leaves, and 25% greater leaf area compared with the conventional trellis. Greatest enhancement of these components was in the upper third of the canopy. Laterals were also shorter in this area of the split canopy, but there was no difference in average total length of lateral/cane between trellis types. Total dry weight/cane was 22% greater in the split trellis, but component partitioning/cane was consistent between the two systems with fruit + laterals (43%) having the greatest above-ground biomass, followed by the stem (30% to 33%) and the leaves (21% to 22%). Measurement of canopy width, circumference, and light interception showed that the split-trellis canopy filled in more quickly, and was larger from preanthesis through postharvest. Light interception near the top of the split canopy was 30% greater 1 month before harvest with 98% interception near the top and middle of that canopy. There was no difference between the trellis types in leaf CO2 assimilation, spectra, or fluorescence through the fruiting season, or in total nitrogen of postharvest primocane leaves.

scholarly journals Impact of Different Water Management Regimes on the Growth, Productivity, and Resource Use Efficiency of Dry Direct Seeded Rice in Central Punjab-Pakistan

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1151
Author(s):  
Sadam Hussain ◽  
Saddam Hussain ◽  
Zubair Aslam ◽  
Muhammad Rafiq ◽  
Adeel Abbas ◽  
...  
Keyword(s):  
Grain Yield ◽  
Hybrid Rice ◽  
Water Productivity ◽  
Dry Weight ◽  
Cost Ratio ◽  
Yield Attributes ◽  
Benefit Cost Ratio ◽  
Direct Seeded ◽  
Total Dry Weight ◽  
Benefit Cost

Dry direct-seeded rice has been shown to save irrigation water and labor. Nonetheless, irrigation management in dry direct-seeded rice has received very little attention. Here, we examined the potential of different irrigation regimes: aerobic rice (AR), alternate wetting and drying (AWD) and continuous flooding (CF) in dry direct-seeded rice cultivation on two rice cultivars (Pride-1 (hybrid indica) and NB-1 (inbred indica)). Growth, yield attributes, grain yield, total water input, water productivity and benefit cost ratio were measured. Our results showed that AR saved 11.22 and 28.40%, and 5.72 and 32.98% water compared with AWD and CF during 2018 and 2020, respectively. There was a significant difference in grain yield among treatments and cultivars. AWD and CF produced statistically same total dry weight and grain yield, while AR reduced the total dry weight by 31.34% and 38.04% and grain yield by 34.82% and 38.16% in comparison to AWD and CF, respectively, across the years. Except for 1000-grain weight and harvest index in AWD and CF, further differences in total dry weight and grain yield among irrigation treatments were primarily correlated with variations in yield attributes. Among the cultivars, hybrid rice performed better than inbred rice. Over the two-year period, hybrid rice increased total dry weight, grain yield, and water productivity by 9.28%, 13.05%, and 14.28%, respectively, as compared to inbred rice. Regarding water productivity (WP), the maximum percentage (40.90 and 26.53%) was recorded for AWD compared to AR and CF. Among cultivars, more water productivity (14.28%) was calculated for hybrid rice than inbred one. Chlorophyll and carotenoid contents, leaf area index and crop growth rate contributed to higher grain yield of hybrid rice under AWD and CF. In contrast to WP, the maximum benefit cost ratio was estimated to be higher for CF than that of AR and AWD. For the cultivars, the maximum value (2.26 in 2018 and 2.32 in 2020) was calculated for hybrid rice compared with the inbred one. In conclusion, these results suggests that AWD with maximum WP and CF with maximum BCR could be more efficient approaches than AR. Under CF, hybrid rice cultivars with higher yield and yield-related attributes, WP and BCR performed better.

Effects of Temperature and CO2Concentration on the Growth of Cotton (Gossypium hirsutum), Spurred Anoda (Anoda cristata), and Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1988 ◽  
Vol 36 (6) ◽  
pp. 751-757 ◽  
Author(s):  
David T. Patterson ◽  
Maxine T. Highsmith ◽  
Elizabeth P. Flint
Keyword(s):  
Dry Matter ◽  
Dry Weight ◽  
Net Assimilation Rate ◽  
Assimilation Rate ◽  
Short Term ◽  
Leaf Weight ◽  
Matter Production ◽  
Total Plant ◽  
Net Assimilation ◽  
Total Dry Weight

Cotton, spurred anoda, and velvetleaf were grown in controlled-environment chambers at day/night temperatures of 32/23 or 26/17 C and CO2concentrations of 350 or 700 ppm. After 5 weeks, CO2enrichment to 700 ppm increased dry matter accumulation by 38, 26, and 29% in cotton, spurred anoda, and velvetleaf, respectively, at 26/17 C and by 61, 41, and 29% at 32/23 C. Increases in leaf weight accounted for over 80% of the increase in total plant weight in cotton and spurred anoda in both temperature regimes. Leaf area was not increased by CO2enrichment. The observed increases in dry matter production with CO2enrichment were caused by increased net assimilation rate. In a second experiment, plants were grown at 350 ppm CO2and 29/23 C day/night for 17 days before exposure to 700 ppm CO2at 26/17 C for 1 week. Short-term exposure to high CO2significantly increased net assimilation rate, dry matter production, total dry weight, leaf dry weight, and specific leaf weight in comparison with plants maintained at 350 ppm CO2at 26/17 C. Increases in leaf weight in response to short-term CO2enrichment accounted for 100, 87, and 68% of the observed increase in total plant dry weight of cotton, spurred anoda, and velvetleaf, respectively. Comparisons among the species showed that CO2enrichment decreased the weed/crop ratio for total dry weight, possibly indicating a potential competitive advantage for cotton under elevated CO2, even at suboptimum temperatures.

Ascorbic Acid and Reducing Agents Regulate the Fates and Functions of S-Nitrosothiols

1997 ◽  
Vol 122 (6) ◽  
pp. 1208-1214 ◽  
Author(s):  
M. Kashiba-Iwatsuki ◽  
K. Kitoh ◽  
E. Kasahara ◽  
H. Yu ◽  
M. Nisikawa ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Reducing Agents

Development and quantitative measurement of microsclerotia of Verticillium dahliae

1972 ◽  
Vol 50 (11) ◽  
pp. 2097-2102 ◽  
Author(s):  
R. Hall ◽  
H. Ly
Keyword(s):  
Verticillium Dahliae ◽  
Mycelial Growth ◽  
Quantitative Measurement ◽  
Dry Weight ◽  
Pure Cultures ◽  
Carbon Nitrogen Ratio ◽  
Low Glucose ◽  
Nitrogen Ratio ◽  
Total Dry Weight ◽  
Hyaline Material

The development of microsclerotia of Verticillium dahliae from a few swollen hyaline cells on a hypha to a multicellular, pigmented "mature" structure is described and illustrated. A method for quantitatively estimating the amount of pigmented microsclerotial material in pure cultures was developed to study quantitative relations between mycelial growth and production of microsclerotial material in media containing different concentrations of glucose. At low glucose concentrations (0.6 to 10 mg/ml) microsclerotial material continued to increase after total dry weight of the cultures had reached a maximum, suggesting conversion of hyaline to pigmented material. At high glucose concentrations (20 to 60 mg/ml) the patterns of increase in total dry weight, microsclerotial material, and hyaline material were similar over a 4-week incubation period. Maximum production of both pigmented and hyaline materials occurred at a glucose concentration of 30 mg/ml (carbon/nitrogen ratio of 50/1).

Stabilité phénotypique de la croissance en hauteur et cinétique journalière de la pression de sève et de la transpiration chez le pin maritime (Pinuspinaster Ait.)

1982 ◽  
Vol 12 (4) ◽  
pp. 936-946 ◽  
Author(s):  
J. P. Guyon ◽  
A. Kremer
Keyword(s):  
Sand Dune ◽  
Dry Weight ◽  
Height Growth ◽  
Coastal Sand Dune ◽  
Loss Of Weight ◽  
Coastal Sand ◽  
Total Dry Weight ◽  
Physiologic Activity ◽  
Response To Environmental Change ◽  
Pin Maritime

A study of geographic variation of maritime pine (Pinuspinaster Ait.) 9 years old, regarding height growth, transpiration and sap pressure daily kinetics has been performed in two sites, one in coastal sand dune and the other one in a more interior well-drained sandy moor. Successive height increments were measured from the 4th to the 9th year of growth and the year × provenance interaction was investigated. Transpiration and sap pressure were measured on 2-year-old needle fascicles. Results show discriminant variations between provenances and suggest some hypotheses about the possible ways of natural selection concerning drought resistance. The provenances North Landes (France) and Leiria (Portugal) grow best and strongly react to any variation of environmental factors as reflected by the high value of the slope of their regression lines (regression of their annual mean on the overall annual mean). Such a genotypie instability coincides with an intense physiologic activity (large flux of water correlated with a strong loss of weight by transpiration, reaching after 3 min 2% of the total dry weight of the separated needles and associated with the lowest sap pressure when the sun is around zenith). On the contrary, the Morocan provenance Tamjoute shows a large stability; its daily curves of transpiration and sap pressure reach early their maximum and minimum and therefore express a stress avoidance. Between these two extreme behaviours, the provenances Cazorla (south Spain) and Porto-Vecchio (Corsica) have intermediate values of transpiration and sap pressure, and their height growth shows a relative stability of response to environmental change.

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