ACCELERATION OF DEVELOPMENT OF LARVAE OF THE ONION MAGGOT, HYLEMYA ANTIQUA (MEIG.), BY MICROORGANISMS

1959 ◽  
Vol 37 (5) ◽  
pp. 721-727 ◽  
Author(s):  
W. G. Friend ◽  
E. H. Salkeld ◽  
I. L. Stevenson
Keyword(s):  
Growth Rate ◽  
Bacterial Cells ◽  
Onion Maggot ◽  
Hylemya Antiqua ◽  
Rate Of Development ◽  
Sonic Treatment ◽  
Living Bacteria

On a chemical diet, larvae of H. antiqua developed more rapidly in the presence of various living bacteria, of certain nonviable bacterial cells, or of the dialyzate of these cells. The stimulation by the nonviable cells was not affected when the cells were disrupted by sonic treatment. Additions of ashed cells to the chemical diet had no stimulatory effect. Some stimulation in rate of development was noted on addition of casein to the diets but to a lesser degree than that caused by equivalent concentrations of nonviable cells. The growth rate and the rate of metamorphosis stayed in phase with one another when development was accelerated.

scholarly journals Precise regulation of the relative rates of surface area and volume synthesis in bacterial cells growing in dynamic environments

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Handuo Shi ◽  
Yan Hu ◽  
Pascal D. Odermatt ◽  
Carlos G. Gonzalez ◽  
Lichao Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Time Delay ◽  
Surface Area ◽  
Environmental Changes ◽  
Volume Ratio ◽  
Dynamic Environments ◽  
Bacterial Cells ◽  
Bacterial Growth Rate ◽  
State Size ◽  
Insight Into

AbstractThe steady-state size of bacterial cells correlates with nutrient-determined growth rate. Here, we explore how rod-shaped bacterial cells regulate their morphology during rapid environmental changes. We quantify cellular dimensions throughout passage cycles of stationary-phase cells diluted into fresh medium and grown back to saturation. We find that cells exhibit characteristic dynamics in surface area to volume ratio (SA/V), which are conserved across genetic and chemical perturbations as well as across species and growth temperatures. A mathematical model with a single fitting parameter (the time delay between surface and volume synthesis) is quantitatively consistent with our SA/V experimental observations. The model supports that this time delay is due to differential expression of volume and surface-related genes, and that the first division after dilution occurs at a tightly controlled SA/V. Our minimal model thus provides insight into the connections between bacterial growth rate and cell shape in dynamic environments.

A SIMPLE TECHNIQUE FOR MASS-REARING THE ONION MAGGOT (DIPTERA: ANTHOMYIIDAE) ON AN ARTIFICIAL DIET

1970 ◽  
Vol 102 (12) ◽  
pp. 1554-1558 ◽  
Author(s):  
W. R. Allen ◽  
W. L. Askew
Keyword(s):  
Artificial Diet ◽  
Simple Technique ◽  
Adult Emergence ◽  
Mass Rearing ◽  
Cellulose Powder ◽  
Egg Hatch ◽  
Wheat Embryo ◽  
Onion Maggot ◽  
Hylemya Antiqua ◽  
Yeast Hydrolysate

AbstractA gelatine-based diet for rearing the onion maggot, Hylemya antiqua (Meigen), that contains sucrose, evaporated milk, yeast hydrolysate, wheat embryo, cellulose powder, n-propyl disulfide, water, and antibiotics is described. Three consecutive generations reared on this medium were equal in puparial weights, percentages of pupation, adult emergence, and egg hatch, to those reared on onion bulbs. The procedure is simple and two man-hours per week is sufficient for producing 1000 maggots daily.

A Note on a Dipterous Predator of the Onion Maggot, Hylemya antiqua (Meig.)

1952 ◽  
Vol 84 (4) ◽  
pp. 112-112 ◽  
Author(s):  
J. P. Perron ◽  
J. Lafrance
Keyword(s):  
Life History ◽  
Onion Maggot ◽  
Hylemya Antiqua ◽  
History Of

In investigations on the life-history of the onion maggot at St. Jean, Que., in 1951, a few specimens of a dipterous predator were found in the rearing cages in the laboratory. They were feeding voraciously on the adults, destroying a colony of nearly 300 flies within two weeks.Specimens were identified by Mr. A. R. Brooks, Systematic Entomology, Division of Entomology, Saskatoon, Sask., as Coenosia tigrina (F.). Mr. G. E. Shewell, Systematic Entomology, Division of Entomology, Ottawa, has stated that nothing is known in Canada about the life-history of this species, but that it is apparently well known as a predator in Europe and that B. M. Hobby has published a long list of species on which it preys, including many anthomyiids.

Real-time activity assays of β-lactamases in living bacterial cells: application to the inhibition of antibiotic-resistant E. coli strains

2017 ◽  
Vol 13 (11) ◽  
pp. 2323-2327 ◽  
Author(s):  
Ying Ge ◽  
Ya-Jun Zhou ◽  
Ke-Wu Yang ◽  
Yi-Lin Zhang ◽  
Yang Xiang ◽  
...  
Keyword(s):  
Real Time ◽  
Biological Systems ◽  
Bacterial Cells ◽  
Antibiotic Resistant ◽  
Time Activity ◽  
E Coli ◽  
Living Bacteria

A UV-Vis approach is reported for activity assays and inhibition of β-lactamases in complex biological systems of living bacteria.

scholarly journals Altering Developmental Trajectories in Mice by Restricted Index Selection

Genetics ◽  
1997 ◽  
Vol 146 (2) ◽  
pp. 629-640
Author(s):  
William R Atchley ◽  
Shizhong Xu ◽  
David E Cowley
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Weight Gain ◽  
Complex Traits ◽  
Body Weight Gain ◽  
Developmental Trajectories ◽  
Cell Number ◽  
Index Selection ◽  
Early Postnatal Development ◽  
Rate Of Development

A restricted index selection experiment on mice was carried out for 14 generations on rate of early postnatal development (growth rate from birth to 10 days of age) vs. rate of development much later in ontogeny (growth rate from 28 to 56 days of age). Early rate of development (E) approximates hyperplasia (changes in cell number) and later rate (L) reflects hypertropy (changes in cell size). The selection criteria were as follows: E+L0 was selected to increase early body weight gain while holding late body weight gain constant; E–L0 was selected to decrease early body gain while holding late gain constant; E0L+ was selected to increase late gain holding early gain constant; and E0L– was selected to decrease late gain holding early gain constant. After 14 generations of selection, significant divergence among lines has occurred and the changes in the growth trajectories are very close to expectation. The genetic and developmental bases of complex traits are discussed as well as the concept of developmental homoplasy.

scholarly journals Inheritance of a White-eye Mutation in the Onion Maggot Fly, Hylemya antiqua (Meig.)

Nature ◽  
1964 ◽  
Vol 202 (4934) ◽  
pp. 827-827 ◽  
Author(s):  
C. A. BARLOW ◽  
H. D. NIEMCZYK
Keyword(s):  
Onion Maggot ◽  
Hylemya Antiqua

Effective Disinfection of Trout Eggs to Prevent Egg Transmission of Aeromonas liquefaciens

1969 ◽  
Vol 26 (9) ◽  
pp. 2311-2318 ◽  
Author(s):  
T. W. McFadden
Keyword(s):  
Outer Surface ◽  
Povidone Iodine ◽  
No Reduction ◽  
Aeromonas Salmonicida ◽  
Bacterial Cells ◽  
Surface Disinfection ◽  
Rate Of Development ◽  
Iodine Compound ◽  
Organic Iodine ◽  
Viable Bacteria

Treatment of trout eggs with classical disinfectants such as sulfo-merthiolate, merthiolate, and acriflavine proved unreliable for destroying Aeromonas liquefaciens on the eggshell. These bacteristatic agents washed free leaving viable bacteria on the shell.An organic iodine compound, povidone–iodine, was found to be bactericidal at dosages readily tolerated by trout eggs. No reduction in the rate of development was observed after treatment.Transmission of A. liquefaciens from parents to offspring follows the route reported for Aeromonas salmonicida. Viable bacterial cells are carried on the outer surface of the shell only, enabling the use of surface disinfection.

STUDIES ON VITAMIN REQUIREMENTS OF LARVAE OF THE ONION MAGGOT, HYLEMYA ANTIQUA (MG.), UNDER ASEPTIC CONDITIONS

1956 ◽  
Vol 34 (2) ◽  
pp. 152-162 ◽  
Author(s):  
W. G. Friend ◽  
R. L. Patton
Keyword(s):  
Growth Factors ◽  
Growth And Development ◽  
Coenzyme A ◽  
Pantothenic Acid ◽  
Normal Growth ◽  
Thioctic Acid ◽  
Experimental Conditions ◽  
Onion Maggot ◽  
Hylemya Antiqua ◽  
Aseptic Conditions

Larvae of the onion maggot, Hylemya antiqua (Mg.), were reared individually under aseptic conditions on chemically defined diets. Of 11 growth factors tested, biotin, pantothenic acid, choline, folic acid, pyridoxine, riboflavin, niacin, and thiamine were essential for normal growth and development of the larvae. Omitting one of vitamin B12, thioctic acid, or coenzyme A slowed larval development slightly; fewer larvae pupated, and the ratio of male to female flies was high. However, these growth factors were not essential under the experimental conditions. This is believed to be the first chemically defined diet that will support the growth and development of a phytophagous insect under aseptic conditions. The check diet, which contained all of the vitamins tested, consisted of 19 l-amino acids, 9 B vitamins, coenzyme A, thioctic acid, inosine, thymine, ribonucleic acid, glucose, cholesterol, a salt mixture, and agar.

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