Wyniki wyszukiwania - AGRO

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Embryo and endosperm in Rudbeckia bicolor Nutt. - resumption of study

100%

Musial K., Koscinska-Pajak M., Sliwinska E., Ilnicki T.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2005

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tom 47

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nr 1

2

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Silver economy in rural development strategies

100%

Krzyminiewska G.

Journal of Agribusiness and Rural Development

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2018

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nr 4[50]

3

Continuous quantification of wheat development after flag leaf emergence

100%

Cabeza C. E., Kin A., Deblonde P., Ledent J. F.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

4

Evadne anonyx G. O. Sars, 1897 – the first record of this Ponto-Caspian cladoceran in the Gulf of Gdansk (Baltic Sea)

86%

Bielecka L., Mudrak-Cegiolka S., Kalarus M.

Oceanologia

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2014

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tom 56

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nr 1

5

Comparison of dynamic behavior and maturation of neural multipotent cells derived from different spinal cord developmental stages: an in vitro study

86%

Slovinska L., Szekiova E., Blasko J., Devaux S., Salzet M., Cizkova D.

Acta Neurobiologiae Experimentalis

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2015

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tom 75

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nr 1

Neural progenitor cells (NPCs) are characterized as undifferentiated cells with the ability of self-renewal and multipotency to give rise to other cells of the nervous system. In our in vitro study we demonstrate the proliferative and differentiative potential of NPCs isolated from the spinal cord at different developmental stages (embryonal, early postnatal, adult), maintained and expanded within neurospheres (NSs). Using the NSs culture system, we examined the size, number of NSs and their fate when exposed to differentiation conditions. Based on immunocytochemical analyses for cell markers (MAP 2, GFAP, RIP) we evaluated the occurrence of various cell types: neurons, astrocytes and oligodendrocytes. The results show that NSs increased in size during cultivation time via NPC proliferation, but proliferation potential decreased during maturation stages. In addition, NPCs derived from spinal cord developmentally different stages gave rise to a consistent ratio of glial and neuronal progeny (3:1), and adult tissues represent a comparable source of NPCs compared to embryonal and early postnatal tissues. These data provide useful information for large-scale in vitro expansion of NPCs required for potential cell therapy after spinal cord injury.

6

Microtubular cytoskeleton of embryo-suspensor in Sedum acre L.

86%

Kozieradzka-Kiszkurno M., Swierczynska J., Bohdanowicz J.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2005

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tom 47

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nr 1

7

White communicating rami in human embryos at the end of the fifth week

86%

Bruska M., Lupicka J., Pytel A., Wozniak W.

Folia Morphologica

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2010

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tom 69

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nr 2

White communicating rami were traced in 8 human embryos of developmental stages 14 and 15 (aged 33 and 36 postovulatory days, respectively). In embryos at stage 14 the white communicating rami were found in the spinal nerves T1 to T9. In embryos at stage 15 the white communicating rami were present at the spinal cord levels T1 to L3. (Folia Morphol 2010; 69, 2: 75–77)

8

Survival of blastodermal cells isolated from zebrafish, Brachydanio rerio [Hamilton, 1822] embryos: effects of dispersion technique and embryo's developmental stage

86%

Pokorny p., Dobicki W.

Acta Scientiarum Polonorum. Piscaria

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2003

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tom 02

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nr 1

9

The effect of various soil management techniques on growth and yield in the black chokeberry [Aronia melanocarpa Elliot]

86%

Kawecki Z., Tomaszewska Z.

Journal of Fruit and Ornamental Plant Research

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2006

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tom 14

10

Plant height at different developmental stages in observed types of sunflower [Helianthus annuus L.] cultivars

86%

Kluza-Wieloch M.

Roczniki Akademii Rolniczej w Poznaniu. Botanika

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2003

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tom 06

Changes in shoot length during development of two hybrid cultivars and one population cultivar of oilseed sunflower were compared in 3-year trials. Effects of cultivar, climatic factors, sowing density, and fertilization on plant height were analysed. In the conducted experiments, hybrid cultivars had higher shoots than cultivar ‘Wielkopolski’ since the first studied developmental stage (star stage). However, the large plant height does not have a positive effect on their agronomic value. Results of this study show that sunflowers were the highest in 1999 at all developmental stages, which resulted from more favourable weather conditions and soil type. The lowest final plant height was recorded when sunflowers were grown on brown-earth soil. This study confirms that increased sowing density caused a stronger elongation of shoots since the earliest developmental stages.

11

The influence of shoot harvesting on the age structure of Convallaria majalis L. populations

86%

Kosinski I.

Acta Societatis Botanicorum Poloniae

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2003

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tom 72

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nr 1

This paper presents the structure of developmental stages and the age structure of Convallaria majalis L. populations. The investigation material consisted of individuals and modules from populations in Betulo-Quercetum, Fago-Quercetum, Melico-Fagetum and Tilio-Carpinetum, in which the leaves and inflorescence of C. majalis were cut annually over a period of three years. Fifty percent of the C. majalis regional population consisted of mature modules, 20% of juvenile modules, 25% of senile modules and a very small percentage of generative modules. In populations of Fago-Quercetum there are four times more senile modules than juvenile modules, while in Melico-Fagetum the percentage of juvenile modules is four times more numerous than the percentage of senile modules. The average age of modules is 4.7±3.8 years. Three year old individuals dominate in the population, while 10 year or older individuals are very rare. In the population disturbed by the three raw material collections, the percentage of juvenile modules was decreased by 50% and the percentage of generative modules was nonexistent. As a result, the average module age is higher than in the undisturbed population. Cutting leaves and inflorescence is an important factor in limiting the recruitment of juvenile modules. The growth of individuals in the disturbed population occurs among older modules, which were able to reproduce before the disturbance occurred. Young individuals (three to four years old) are less numerous in the disturbed population, and the majority of individuals are three to six years old.

12

Influence of development stage on the content of biologically active compounds of Salvia miltiorrhiza Bunge roots

86%

Buchwald W., Mrozikiewicz P. M.

Herba Polonica

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2007

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tom 53

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nr 4

Studies on contents of phenolic compounds and diterpenes in Salvia miltiorrhiza Bunge root during the vegetation period were carried out. In Polish climate and soil condition, the tanshinone II A occurred as the dominant compound from diterpenes group. Obtained results show that the most profitable period for harvesting Salvia miltiorrhiza raw material is fructification stage. However, it is very difficult to decide on the accurate harvest date in this period. After all, taking into account various weather conditions, harvest of the Salvia mitiorrhiza Bunge should be done at the end of the vegetation period (in November).

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Content of microelements in crops of long-fibred flax depending on forms and microfertilizers applied

72%

Tsyganov A., Kukresh S., Khodyankova S., Duktov V.

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

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2004

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tom 59

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nr 4

14

The influence of development stage of brood used for rearing honeybee queens on the number of obtained queen cells

72%

Gabka J., Kaminski Z., Madras-Majewska B.

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

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2010

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tom 06

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nr 4

15

The effect of seedling chilling on glutathione content, catalase and peroxidase activity in Brassica oleracea L. var. italica

72%

Wojciechowska R., Hanus-Fajerska E. J., Kolton A., Kaminska I., Grabowska A., Kunicki E.

Acta Societatis Botanicorum Poloniae

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2013

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tom 82

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nr 3

The study was designed to determine the possible relationship between Brassica oleracea var. italica seedlings stored at 2°C in the dark for seven and fourteen days, respectively, and the level of certain antioxidant parameters in particular organs. A parallel objective of the experiment was to determine if the reaction of seedlings to low temperature might be persistent in fully developed plants until harvest time. After 14 days of chilling a significant increase in the glutathione content was observed in the seedling leaves in comparison to the non-chilled plants. During vegetation in field conditions this effect was maintained in leaves up to the stage of formation of flower buds. At harvest the highest content of glutathione was demonstrated in broccoli heads, obtained from plants, which were previously chilled in the seedling phase for two weeks. Peroxidase activity in broccoli seedlings increased each year of the three-year study due to the duration of the cooling time, whereas in the case of catalase the changes were not so distinct. At harvest time the activity of both enzymes in the leaves and flower buds fluctuated according to the particular year of study.

16

The length of the humerus in human embryos at developmental stages 18-23

72%

Wozniak W., Bruska M.

Folia Morphologica

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2006

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tom 65

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nr 2

136-139

The length of the humerus was measured in 69 staged human embryos at developmental stages 18–23 (7 and 8 weeks). It was found that the length of the humerus increases from 2.0 mm at stage 18 to 5.4 mm at stage 23. There were slight variations at certain of the stages investigated. Asymmetry between limb lengths was not found during the embryonic period under examination.

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Developmental stages of Achtheres percarum (Crustacea: Copepoda) parasitic on European perch, Perca fluviatilis (Actinopterygii: Perciformes)

72%

Piasecki W., Kuzminska E.

Acta Ichthyologica et Piscatoria

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2007

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tom 37

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nr 2

Background. Achtheres percarum is an important copepod parasite (Crustacea: Copepoda) of European perch. Adult females permanently attach to the gill arches, roof of the mouth, tongue, and gill filaments. Attachment, at the latter site, may result in necrosis and epithelial hypertrophy, both compromising fish respiration during oxygen deficiencies. Adult males can move freely on gills of perch. To date there has been no published record of the complete set of developmental stages of this fish parasite. Provision of such may have practical implications for freshwater ichthyopathology, for example helping to monitor the dynamics of the parasite’s populations. It may also provide useful information regarding copepod phylogenetics. Materials and Methods. Early developmental stages (nauplius and copepodid) of A. percarum were acquired through incubation of eggs within egg sacs of females collected from European perch, Perca fluviatilis L., caught commercially in 1994 in Lake Dąbie, Szczecin, Poland. All subsequent larval stages were collected from gills of perch caught in the same lake, in 1990. All copepods were fixed and preserved in 75% ethanol. A modified "wooden slide" method was used to observe the collected developmental stages in a suspended drop of lactic acid, using a compound microscope. Specimens were stained in lignin pink and morphologic details of were drawn using a drawing tube. Results. The life cycle of A. percarum consists of 7 developmental stages, separated by moults (nauplius, copepodid, chalimus I, chalimus II, chalimus III, chalimus IV, and adult). The nauplius hatches from the egg and quickly moults into the copepodid. Both stages are free swimming and the copepodid is the infective stage, attaching to the host′s gill filaments, through the frontal filament. The subsequent chalimus stages (I through IV) "inherit" the copepodid′s frontal filament, modifying its proximal end, such that the structure of the proximal end of the frontal filament explicitly identifies the stage of a chalimus. Two adult males were found attaching, by means of claws of its maxillipeds, to the frontal filament, left over by previous stages. Conclusion. The number of developmental stages of A. percarum determined within the presently reported study is consistent with that hitherto found in the life cycles of other lernaeopodids.

18

The structure of the ovule of Sida hermaphrodita (L.) Rusby after pollination

72%

Chudzik B., Szczuka E., Domaciuk M., Pavlov D.

Acta Agrobotanica

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2010

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tom 63

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nr 2

The anatomical structure and the distribution of arabinogalactan proteins were investigated in the ovule of an energetic plant Sida hermaphrodita (L.) Rusby after pollination. Material was collected from an experimental field of the University of Life Sciences in Lublin (Felin). After embedding for immunoflurescence, semi-thin sections were stained with toluidine blue or incubated with JIM 13 or MAC 207 monoclonal antibodies for immunolabeling of arabinogalactan proteins. The structure of the ovule showed some differences in comparison to other representatives of the Malvaceae family. Conversely, the distribution of arabinogalactan proteins did not differ significantly from their distribution in the ovules of other angiosperms at the investigated stage of development.

19

Gonad maturity in female Chinese mitten crab Eriocheir sinensis from the Southern Baltic Sea – the first description of ovigerous females and the embryo developmental stage

72%

Wojcik D., Normant M.

Oceanologia

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2014

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tom 56

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nr 4

20

Hypermetamorphosis of Rhacopus attenuatus (Maeklin) (Coleoptera, Eucnemidae)

72%

Burakowski B.

Annales Zoologici

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1988-1989

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tom 42

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nr 05-08

A description is given of the developmental stages of Rhacopus attenuatus (Ma- Eklin) from Poland. Five instars are recognized, and the first instar is of the triungulin ype. This is the first time triungulin has been found in the coleopterous family Eucnemidae. ГЬе structure of the male and female terminalia, and the bionomics are also provided.

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