EFFECT OF COLCHICINE ON THE MYCELIAL WEIGHT AND THE NITROGEN AND PHOSPHORUS CONTENTS OF THE MYCELIUM OF CUNNINGHAMELLA SP.

1966 ◽  
Vol 12 (1) ◽  
pp. 91-97 ◽  
Author(s):  
M. I. Naguib ◽  
A. M. Salama
Keyword(s):  
Organic Compounds ◽  
Phosphorus Content ◽  
Phosphorus Uptake ◽  
Nitrate Assimilation ◽  
Dry Weight ◽  
Nitrogen And Phosphorus ◽  
High Concentrations ◽  
Excessive Accumulation

Colchicine had little effect on dry weight, nitrate, and phosphorus uptake, during a 48-hour period, by 5-day-old mycelium of Cunninghamella sp. except at 10 p.p.m. concentration of the chemical when the phosphorus content was higher. The drug also induced a higher percentage incorporation of phosphorus into organic compounds, while protein building was lowered particularly in the presence of 20 p.p.m. of colchicine. The latter phenomenon was accompanied by excessive accumulation of peptide nitrogen mostly in the external medium.Further, high concentrations of colchicine seemed to inhibit the rate of nitrate assimilation.

Potential Contribution of Nutrients and Polycyclic Aromatic Hydrocarbons from the Creeks of Cootes Paradise Marsh

1996 ◽  
Vol 31 (3) ◽  
pp. 485-504 ◽  
Author(s):  
Patricia Chow-Fraser ◽  
Barb Crosbie ◽  
Douglas Bryant ◽  
Brian McCarry
Keyword(s):  
Aromatic Hydrocarbons ◽  
Laboratory Experiments ◽  
Dry Weight ◽  
Common Source ◽  
Potential Contribution ◽  
Nitrogen And Phosphorus ◽  
Engine Combustion ◽  
Polycyclic Aromatic ◽  
High Concentrations ◽  
Derivatives Of

Abstract During the summer of 1994, we compared the physical and nutrient characteristics of the three main tributaries of Cootes Paradise: Spencer, Chedoke and Borer’s creeks. On all sampling occasions, concentrations of CHL α and nutrients were always lowest in Borer’s Creek and highest in Chedoke Creek. There were generally 10-fold higher CHL α concentrations and 2 to 10 times higher levels of nitrogen and phosphorus in Chedoke Creek compared with Spencer Creek. Despite this, the light environment did not differ significantly between Spencer and Chedoke creeks because the low algal biomass in Spencer Creek was balanced by a relatively high loading of inorganic sediments from the watershed. Laboratory experiments indicated that sediments from Chedoke Creek released up to 10 µg/g of soluble phosphorus per gram (dry weight) of sediment, compared with only 2 µg/g from Spencer Creek. By contrast, sediment samples from Spencer Creek contained levels of polycyclic aromatic hydrocarbon that were as high as or higher than those from Chedoke Creek, and much higher than those found in Borer’s Creek. The distribution of normalized PAH concentrations suggests a common source of PAHs in all three tributaries, most likely automobile exhaust, since there were high concentrations of fluoranthene and pyrene, both of which are derivatives of engine combustion.

Dry weight, nitrogen and phosphorus content of Schistosoma mansoni

1957 ◽  
Vol 6 (2) ◽  
pp. 202-207 ◽  
Author(s):  
Myron G. Radke ◽  
Morris D. Schneider ◽  
Dannie G. Houghtaling
Keyword(s):  
Schistosoma Mansoni ◽  
Phosphorus Content ◽  
Dry Weight ◽  
Nitrogen And Phosphorus

Role of phosphorus fertiliser banding and the ratio of nitrate to ammonium on the uptake of phosphorus and wheat growth: a glasshouse study

2002 ◽  
Vol 42 (8) ◽  
pp. 1095 ◽  
Author(s):  
G. R. Valizadeh ◽  
Z. Rengel ◽  
A. W. Rate
Keyword(s):  
Root Growth ◽  
Soil Type ◽  
Growth Response ◽  
Phosphorus Content ◽  
Phosphorus Uptake ◽  
Nitrogen And Phosphorus ◽  
Wheat Growth ◽  
Nitrogen Fertiliser ◽  
Phosphorus Fertiliser

While it is known that nitrogen fertilisers improve phosphorus uptake depending on soil type and pH, the role in phosphorus uptake of the ratio of nitrate to ammonium in nitrogen fertiliser banded with phosphorus fertiliser is unclear. The present glasshouse study investigated the wheat growth response to different rates of application and banding depths (5 and 15 cm) of nitrogen and phosphorus, and mixing of phosphorus fertiliser with soil. The effect of 2 forms of nitrogen (ammonium and nitrate) banded with phosphorus fertiliser was also studied.Both banding depths increased phosphorus uptake and wheat growth more than mixing fertiliser throughout the soil. Banding at the 5 cm depth increased phosphorus uptake efficiency and wheat growth more than banding at the 15 cm depth. The highest shoot and root growth and phosphorus content were found when the nitrate : ammonium ratio was 50 : 50 and 75 : 25, with a slight decline at 100 : 0. The treatments with a large proportion of ammonium suppressed the growth of wheat and, consequently, reduced total phosphorus content. It was concluded that banding nitrate and ammonium at ratios 50 : 50, 75 : 25 and 100 : 0 with phosphorus fertiliser at 5 cm depth was optimal for increasing phosphorus uptake and wheat growth.

scholarly journals Effect of various levels of nitrogen and phosphorus on nutrient content and uptake of Palmarosa (Cymbopogan martinii var. Motia)

2018 ◽  
Author(s):  
Jayalakshmi Mitnala
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Uptake ◽  
Phosphorus Content ◽  
Block Design ◽  
Phosphorus Uptake ◽  
Nutrient Content ◽  
Potassium Uptake ◽  
Potassium Content ◽  
Nitrogen And Phosphorus ◽  
Four Levels

A field experiment was conducted to study the different levels of Nitrogen and Phosphorus on nutrient content and uptake of Palmarosa under rainfed conditions on vertisols at Panjabrao Deshmukh Krishi Vidyapeeth, Akola during 2007-2008. The experiment was laid in factorial randomized block design with three replications. There were four levels of nitrogen viz., 0 k g (N0), 40 kg (N1), 60 kg (N2), 80 kg (N3) and three levels of phosphorus 0 kg (P0), 20 kg (P1), 40 kg (P2) ha-1. The results revealed that the nitrogen content (0.85%), phosphorus content(0.69%) and potassium content (0.56%) in the crop was highest when treated with 80 kg (N3) ha-1 and the nitrogen content (0.74%), phosphorus content (0.60%) and potassium content (0.48%) was also more with the application of 40 kg (P2) ha-1. Similarly the crop uptake was recorded highest with application of 80 kg N ha-1 where the nitrogen uptake was (30.50 kg ha-1), phosphorus uptake (14.36 kg ha-1 ) and potassium uptake (13.25 kg ha-1), while the nitrogen uptake (22.12 kg ha-1), phosphorus uptake (11.90 kg ha-1) and potassium uptake (10.12 kg ha-1) was also more when treated with 40 kg (P2) ha.-1

The development of cuttings of the Washington navel orange to the stage of fruit set. II. Drifts in nutrient composition

1961 ◽  
Vol 12 (6) ◽  
pp. 1066
Author(s):  
CT Gates ◽  
D Bouma ◽  
H Groenewegen
Keyword(s):  
Phosphorus Content ◽  
Fruit Set ◽  
Dry Weight ◽  
Nutrient Content ◽  
Rhythmic Pattern ◽  
Nitrogen And Phosphorus ◽  
Nutrient Distribution ◽  
Plant Parts ◽  
Washington Navel ◽  
Low Phosphorus

Changes in nutrient content with time, especially of nitrogen and phosphorus content, are presented and are considered in relation to the results for dry weight reported previously. It was found that drifts in nitrogen and phosphorus with time were complementary to the pattern for dry weight noted earlier. The distribution of these nutrients to the developing plant followed a like rhythmic pattern of alternate distribution to shoot and root. There appeared to be no build up of nutrient to trigger off developing of new shoots, and at all times nutrient distribution was preferentially to younger developing parts. Low phosphorus supply caused a lowering of both relative and absolute contents of phosphorus and nitrogen in all plant parts. The pattern of development was not greatly altered in character by low phosphorus but was delayed. All vegetative parts responded similarly in control and low phosphorus plants, and the younger parts did not appear to dominate the older in development. In this regard, the pattern of growth seemed to differ from that of many annuals. The proportion of tissue potassium was lowered and that of calcium raised by ammonium as the source of nitrogen. A concomitant effect on phosphorus and nitrogen metabolism was noted.

Response of lentil to Rhizobium leguminosarum bv. viciae strains at different levels of nitrogen and phosphorus

2000 ◽  
Vol 40 (1) ◽  
pp. 93 ◽  
Author(s):  
N. H. Shah ◽  
F. Y. Hafeez ◽  
M. Arshad ◽  
K. A. Malik
Keyword(s):  
Grain Yield ◽  
Rhizobium Leguminosarum ◽  
Phosphorus Uptake ◽  
Local Strain ◽  
Dry Weight ◽  
Available Phosphorus ◽  
Nodule Occupancy ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Uptake ◽  
Different Levels

Response of lentil (Lens culinaris Medik) to inoculation with 3 local and 1 exotic Rhizobium leguminosarum bv. viciae (lentil rhizobia) strains at different levels of nitrogen and phosphorus (00:00, 20:20, 20:40, 20:60, 20:80, 40:20, 40:40, 40:60 and 40:80 kg/ha as N and P2O5, respectively) was studied. A field experiment was conducted on a soil deficient in nitrogen and available phosphorus that had a very low indigenous population of lentil rhizobia. Percentage strain recovery (nodule occupancy) revealed that the inoculant strains were highly competitive and occupied 71–95% of the nodules. Inoculation had significant benefits for nodulation, biomass, grain yield, nitrogen and phosphorus uptake at all levels of nitrogen and phosphorus. Inoculation with the local strain Lc26 increased yield by 393 kg/ha compared with the uninoculated control. Maximum biomass, and nitrogen and phosphorus uptake were observed where nitrogen and phosphorus were applied at the rates of 40 and 60–80 kg/ha, respectively. The 40:80 kg nitrogen and phosphorus per hectare combination gave the maximum nodule number, nodule dry weight and grain yield (904 kg/ha) with a net return of US$189 as compared to the unfertilised control and there was an income of US$7 for each dollar invested on fertiliser.

Relationship Between Trifluralin and Phosphorus on Transplanted Tomatoes

Weed Science ◽  
1973 ◽  
Vol 21 (2) ◽  
pp. 150-153 ◽  
Author(s):  
H. P. Wilson ◽  
F. B. Stewart
Keyword(s):  
Lycopersicon Esculentum ◽  
Root Growth ◽  
Plant Height ◽  
Phosphorus Content ◽  
Phosphorus Uptake ◽  
Dry Weight ◽  
Inhibitory Effect

Tomato (Lycopersicon esculentumMill. ‘Campbell 17’) plant height and dry weight of tops decreased with increasing rates of α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) and increased with increasing rates of phosphorus. Trifluralin and phosphorus interacted in their effects on root growth; phosphorus was less effective in promoting root growth as the rate of trifluralin increased. Phosphorus content of plant tops increased with each increment of soil-applied phosphorus at 0 and 0.84 kg/ha of trifluralin, but each increment of applied phosphorus did not significantly increase plant phosphorus content at higher rates of trifluralin. The inhibitory effect of trifluralin on phosphorus uptake diminished with time in 1969. Interactions between trifluralin and phosphorus did not occur in 1970.

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