Wyniki wyszukiwania

1

Artificial photoperiod and steroidogenesis of bank vole ovarian follicles

100%

Galas J., Stoklosowa S.

Folia Histochemica et Cytobiologica. Supplement

|

1997

|

tom 35

|

nr 2

2

Growth in vitro cultures of strawberry (Fragaria x ananassa Duch.) depending on different photoperiods

75%

Litwinczuk W., Zubel A.

Folia Horticulturae

|

2005

|

tom 17

|

nr 2

3

The impact of photoperiod and stocking density on the growth and survival of narrow-clawed crayfish [Astacus leptodactylus Esch.] larvae

75%

Ulikowski D., Krzywosz T.

Archives of Polish Fisheries

|

2004

|

tom 12

|

nr 1

The aim of the study was to determine the impact of various photoperiods and stocking densities on the growth and survival of narrow-clawed crayfish larvae. The four-week rearing period was carried out in 50 dm³ tanks in a closed recirculating system. The tanks were stocked with larvae two weeks post hatch with an average body length of 11.2 ± 0.9 mm (TL) and weight of 32.3 ± 2.5 mg. There were three stocking densities (300, 600, and 1200 specimens m⁻² ) and two photoperiods (groups L - 24-hour illumination and groups D - 24-hour darkness). The crayfish were fed ad libitum every 12 hours with granulated feed (45% protein, 6-12% lipid). The experiment indicated that photoperiod had a significant impact (P < 0.05) on the crayfish survival rate, while stocking density impacted growth. Crayfish survival was almost two times higher with 24-hour illumination than it was with 24-hour darkness at each of the stocking densities. The survival and the growth rate of crayfish decreased as the initial stocking density increased. The final biomass of the crayfish stocks reared in 24-hour darkness was similar for each of the stocking densities applied, but the biomass of stocks reared with 24-hour illumination increased along with the stocking densities used. This indicates that it is possible to apply initial densities even greater than 1200 _2 specimens m⁻² during crayfish rearing with 24-hour pond illumination.

4

The response of some Persian clover [Trifolium resupinatum L.] cultivars to daylengths

75%

Kaszuba J. W.

Plant Breeding and Seed Science

|

1996

|

tom 40

|

nr 3-4

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of cold night temperature on flowering of Kalanchoe species

63%

Coelho L. L., Mackenzie K. K., Lutken H., Muller R.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2018

|

tom 17

|

nr 3

Control of flower induction is one of the most important aims in the floriculture industry as it determines the usefulness of plants for cross-pollination and production of flowering plants. The Kalanchoë genus contains around 140 species and numerous interspecific hybrids with a broad range of morphological traits, which makes this genus one of the most cultivated potted plants in the world. Commercial cultivars are easily induced to flowering by short days photoperiod, however, the number of species used for breeding is limited due to the lack of knowledge of flower inducing factors. Many studies suggested that cold night temperature can positively affect flowering in some Kalanchoë species. This study aimed to evaluate flowering in K. prittwitzii, K. marmorata and K. longiflora exposed to different night temperatures (6°C, 12°C and 18°C) combined with short day photoperiod (8 h). K. prittwitzii exhibited 100% flowering in all treatments, and flowering was enhanced by low night temperatures. K. marmorata had minimal flowering response to the treatments and K. longiflora did not flower in any of the treatments. The results support a postulate that interaction between different stimuli is required for flower induction in Kalanchoë species and demonstrate that night temperature can modify the flowering response. Therefore, the interaction between different factors during the plant life cycle requires further investigation.

6

Abundance and seasonal activity of adult Dermacentor reticulatus (Acari: Amblyommidae) in eastern Poland in relation to meteorological conditions and the photoperiod

63%

Bartosik K., Wisniowski L., Buczek A.

Annals of Agricultural and Environmental Medicine

|

2011

|

tom 18

|

nr 2

7

Effects of temperature and photoperiod on the development and survival of the dock leaf beetle [Gastroidea viridula Deg.]

63%

Piesik D.

Electronic Journal of Polish Agricultural Universities. Series Biology

|

2006

|

tom 09

|

nr 2

The effects of temperature (20°C, 25°C, 30°C) and photoperiod (16D:8N, 12D:12N, 8D:16N) on larval body weight, food consumption, egg production, and survival of Gastroidea viridula Deg. (Coleoptera: Chrysomelidae) were determined. Temperatures and photoperiods affected insect development time, larval body weight, and survival. Larvae continued development while 60 days at temperature of 20°C and photoperiod of 8D;16N, but only while 30 days at 30°C, 16D:8N and 12D:12N. Photoperiod not affected the oviposition period and number of eggs produced. Results show that both temperature and photoperiod significantly affects larval body weight and survival.

8

Respiration and oxygen status during bud burst of grapevine

63%

Meitha K., Konnerup D., Considine J., Foyer C., Colmer T., Considine M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

9

Preliminary expression analysis of FCA gene from the flowering autonomous pathway of Lupinus luteus

63%

Banach M., Wojciechowski W., Kesy J., Glazinska P., Wilmowicz E., Kucko A., Marciniak K., Kopcewicz J., Tretyn A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

10

Diurnal rhythm of plasma melatonin level in mares from spring equinox to summer solstice

63%

Rapacz A., Lewczuk B., Prusik M., Ras A.

Bulletin of the Veterinary Institute in Puławy

|

2010

|

tom 54

|

nr 4

The aim of this study was to describe plasma melatonin (MLT) profiles in mares from spring equinox to summer solstice. Two experiments were performed on 19 warm-blood mares: the first in a veterinary clinic and the second in a stable without electricity and located outside a village. In the first experiment, blood samples were collected at 2-h intervals during 50-h periods in March, April, May, June, and July. In the second experiment blood samples were drawn at 2-h intervals for 26 h in March. Plasma concentrations of MLT were measured by direct RIA. The mean plasma MLT level showed significant (P≤0.05) time-dependent changes in horses sampled in March, April, May, June, and July. In experiment I, the mean level of MLT was significantly elevated (compared to the day-time values at 12.00, 16.00, and 18.00) between 20.00 and 04.00 in March, and between 22.00 and 04.00 in April and May, between 24.00 and 04.00 in June and July. Therefore it could be concluded that the duration of the elevated MLT level reflects the length of scotophase, and merits consideration as an important signal in seasonal regulation of reproductive activity. Individual profiles of MLT level were well-entrained in the majority of animals studied in experiment I and in all individuals used in experiment II. The concentrations of plasma MLT varied between mares; however, in the vast majority of individuals, the plasma concentration of MLT was low compared to other mammalian species.

11

Effect of prolonged and shortened photoperiods on motor activity in Syrian hamsters (Mesocricetus auratus Waterhouse) exposed to additional negative ionization of air

63%

Lenkiewicz Z., Dabrowska B., Schiffer Z.

Acta Biologica Cracoviensia. Series Zoologia

|

1989

|

tom 31

12

Wpływ fotoperiodu na biologię ziemniaka

63%

Stefanczyk E., Sliwka J.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

|

2013

|

nr 267

13

Gene and genome mapping in cereals

63%

Borner A.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr 2A

The trait ﬂowering time regulated by genes determining alisation and photoperiod sensitivity was used as an example for presenting data on comparative major gene and QTL mapping within the Triticeae. The major genes are shown to be members of homoeologous series. Furthermore it was demonstrated that in genome regions carrying major genes also QTLs for the same traits were detected.

14

Melatonin from slow-release implants upregulates claudin-2 in the ovine choroid plexus

63%

Szczepkowska A., Kowalewska M., Skipor J.

Journal of Physiology and Pharmacology

|

2019

|

tom 70

|

nr 2

15

Ecological adaptation strategies in alien species: effects of salinity, temperature and photoperiod on Spartina alterniflora Loisel. seed germination

63%

Yuan Z., Shi F.

Polish Journal of Ecology

|

2009

|

tom 57

|

nr 4

677-683

Spartina alterniflora (smooth cordgrass), a perennial grass native to the coastal marshes of eastern America, is widely distributed in northern China since 1979 of its introduction. In the tidal marshlands of north China, S. alterniflora has displaced native species and is presently dominant member of the community owing to its opportunistic characteristics. In this study we investigated S. alterniflora seed germination responses to different temperatures, between 5–25ºC in one thermoperiod (16/26ºC) and in two light treatments – 10/14h (night/day) photoperiod and dark conditions. Variations of seed germination at different storage temperatures and storage duration were also examined. In addition, the effect of different salt concentrations on seed germination was evaluated. The optimal temperature for germination was 25ºC and 16/26ºC (night/day) thermo-period – germination percentage was greater than 90%. Light intensity had no influence on the percent of seed germination and germination indices when seeds were exposed to identical temperatures. At 120 d of storage and -5, 0, and 5ºC temperatures, germination percentage exceeded 75%. The optimal salinity level for seed germination was 150 mM NaCl. Germination percentages were highest (> 90%) when salinity did not exceed 450 mM NaCl. The ability of S. alterniflora seeds to germinate under a wide range of temperature and light conditions resulted in continued seedling development under high salinity.

16

The chemical composition of the radish Raphanus sativus L. as related to environmental conditions during cultivation

63%

Capecka E.

Folia Horticulturae

|

1996

|

tom 08

|

nr 2

17

Circadian rhythm in the subcommissural organ of the frog Rana kl. esculenta under constant darkness

63%

Sura P.

Acta Biologica Cracoviensia. Series Zoologia

|

2000

|

tom 42

18

The adaptation of circumnutation intensity in Helianthus annuus L. to different LD photoperiods

63%

Charzewska A., Zawadzki T., Krupa M., Stolarz M.

Biological Letters

|

2005

|

tom 42

|

nr 2 Spec.Vol.

19

Early spawning in tench [Tinca tinca [L.]] under controlled environmental conditions

63%

Martin P., San Juan L. D., Alvarino J. M. R.

Polskie Archiwum Hydrobiologii

|

1999

|

tom 46

|

nr 3-4

20

Ultrastructure of the ram pinealocytes during breeding season in natural short and in artificial long photoperiods

63%

Lewczuk B., Przybylska B., Udala J., Koncicka A., Wyrzykowski Z.

Folia Morphologica

|

1993

|

tom 52

|

nr 3

Ograniczanie wyników

Artificial photoperiod and steroidogenesis of bank vole ovarian follicles

Growth in vitro cultures of strawberry (Fragaria x ananassa Duch.) depending on different photoperiods

The impact of photoperiod and stocking density on the growth and survival of narrow-clawed crayfish [Astacus leptodactylus Esch.] larvae