Wyniki wyszukiwania - AGRO

1

The assessment of post mortem PCNA plus cell frequency in the rat epidermis

100%

Brzezinski P. M., Godlewski A.

Folia Histochemica et Cytobiologica

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2001

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tom 39

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nr 2

2

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Morphological variability of the leaf epidermis in selected taxa of the genus Ficus L. [Moraceae] and its taxonomic implications

86%

Klimko M., Truchan M.

Acta Societatis Botanicorum Poloniae

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2006

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tom 75

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nr 4

309-324

The leaf epidermis of 36 taxa (species, subspecies, varieties and cultivars) of the genus Ficus (subgenera Ficus, Synoecia, Sycomorus, Pharmacosycea and Urostigma) was observed under LM and SEM. Characteristics of the epidermis are of particular taxonomic as well as phylogenetic interest because they differ conspicuously between species. The differences are especially prominent in the size and shape of epidermal cells, the shape of cell walls, peristomatal cuticular rim, the distribution and position of stomata, lithocysts, hydathodes, trichomes, and the types of wax, cuticle and trichomes. Results of this study provided data on new qualitative and quantitative traits of the leaf epidermis in the selected taxa, and confirmed the classification suggested by Berg (1989).

3

Isolation, characterization and evaluation of anti-proliferative properties of andrographolide isolated from Andrographis paniculata on cultured HaCaT cells

86%

Jindal S., Awasthi R., Singare D., Kulkarni G. T.

Herba Polonica

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2021

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tom 67

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nr 1

4

Orientational variability of parallel arrays of cortical microtubules under the outer cell wall of the Helianthus hypocotyl epidermis

86%

Hejnowicz Z., Burian A., Dobrowolska I., Kolano E.

Acta Societatis Botanicorum Poloniae

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2006

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tom 75

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nr 3

201-206

The epidermis of Helianthus hypocotyl can be peeled off and, in the form of detached strips can be used as a model system to study the effect on cortical microtubule (cMTs) orientation of these factors, which are difficult to be manipulated in situ, such as apoplastic pH or applied stress. In the first step, however, the orientation and reorientation of cMTs in the epidermis in situ must be described. The cMTs under the epidermal wall in hypocotyl epidermis at different positions along the hypocotyl and on its opposite sides were studied by means of immunostaining, using epi-fluorescence microscopy. The angle λ that parallel array of cMTs makes with cell longitudinal axis was measured. The variation of λ in a population of cells was documented by λ-histogram (frequency of cells exhibiting a particular λą∆λ plotted against λ value). The histograms were of either transverse type (maximum at λ ~90o, denoted as type A) or oblique type (two maxima on both sides of the transverse direction, denoted as type B) in the apical part of the hypocotyl, and were either of B type or of longitudinal type (maximum at λ ~0o or 180o denoted as type C) in the basal part. The change from A or B to C basipetally may be considered as due to the developmental trend in cMT orientation. The occurrence of B above A in some hypocotyls in their apical part strengthens the hypothesis on the autonomous reorientation of cMTs. The intermingled occurrence of A and B reorientation in the upper part of hypocotyl is interpreted as a manifestation of a subtle control of cell growth in latitudinal direction. The majority of histograms were asymmetric showing predominance of cMT parallel arrays inclined as the middle part of the letter Z.

5

The removal of epidermis causes change in the orientation of cortical microtubules in the cortex cells of sunflower hypocotyl - significance of tissue stresses

86%

Borowska-Wykret D.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

6

Evidence for the hydrolysis of topical applied liposomal lipids in human stratum corneum

86%

Zellmer S.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr 2

7

The orientation of mitotic spindles and corical microtubuls in the epidermis of sunflower hypocotyl with relationship to stress

86%

Elsner J., Hejnowicz Z.

Polish Journal of Natural Sciences. Supplement

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2003

|

tom 01

8

Distribution patterns of cytokeratins in epidermis and horny teeth of the adult sea lamprey, Petromyzon marinus

86%

Zaccone G., Howie A. J., Mauceri A., Fasulo S., Lo Cascio P., Youson J. H.

Folia Histochemica et Cytobiologica

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1995

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tom 33

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nr 2

9

Mousepox: phenotypical characterization of immune cells in epidermis

86%

Spohr I., Kawiak J., Gierynska M., Popis A., Niemialtowski M. G.

Folia Histochemica et Cytobiologica. Supplement

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1997

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tom 35

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nr 2

10

Structure and ultrastructure of the developing epidermis in grass snake Natrix natrix L. (Lepidosauria, Serpentes)

72%

Swadzba E.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2008

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tom 50

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nr 1

11

Effects of naturally occurring plant phenols on production of reactive oxygen species and DNA damage induced by tumour promoter 12-O-tetradecanoyl phorbol-13-acetate (TPA) in mouse epidermis

72%

Ignatowicz E., Zielinska-Przyjemska M., Szaefer H., Sobierajska H., Baer-Dubowska W.

Herba Polonica

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2012

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tom 58

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nr 4

Naturally occurring phenolics: protocatechuic, chlorogenic, tannic acids and trihydroxystilbene and resveratrol were shown to inhibit multistage carcinogenesis in animal models, including mouse epidermis. Treatment of mouse skin with tumor promoter 12-Otetradecanoyl phorbol-13-acetate (TPA) may induce ROS production in keratinocytes and skin infiltrating leukocytes. In our study, the effect of these phenolics on intracellular ROS production and DNA damage was examined. ROS were analysed by flow cytometry, while DNA damage by comet assay. Following treatment with TPA (6.8 nmol/mouse) two subpopulations of epidermal cells were identified. Pretreatment of mice with 16 mmol of phenolics decreased ROS production in both subpopulations. The most efficient inhibitors of ROS in whole population of keratinocytes were chlorogenic acid and resveratrol. Tannic acid reduced the most DNA damage induced by TPA treatment. These results suggest that anti-promotional effects of these two plant phenols might be partially explained by the inhibition of TPA-induced inflammation.

12

Humoral and cellular autoreactivity to epidermal proteins in atopic dermatitis

72%

Navarrete-Dechent C., Perez-Mateluna G., Silva-Valenzuela S., Vera-Kellet C., Borzutzky A.

Archivum Immunologiae et Therapiae Experimentalis

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2016

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tom 64

|

nr 6

13

The effect of resveratrol and its methylthio-derivatives on the Nrf2-ARE pathway in mouse epidermis and HaCaT keratinocytes

72%

Krajka-Kuzniak V., Szaefer H., Stefanski T., Sobiak S., Cichocki M., Baer-Dubowska W.

Cellular and Molecular Biology Letters

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2014

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tom 19

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nr 3

Resveratrol is the most extensively studied stilbene derivative. We previously showed that methylthiostilbenes were more effective inhibitors of CYP1A1 and 1B1 activity than resveratrol. In this study, we investigated whether resveratrol and its methylthio-substituted derivatives, i.e. 3-M-4′-MTS (S2), 3,5-DM-4′-MTS (S5) and 3,4,5-TM-4′-MTS (S7) could activate Nrf2 signaling in the mouse epidermis and in human keratinocytes. Western blot analysis showed translocation of Nrf2 from the cytosol to the nucleus in both models. All of the tested stilbenes increased GST activity, but resveratrol was the most effective inducer. Moreover, only resveratrol increased the protein level of GSTP in the mouse epidermis. GSTM was enhanced in HaCaT cells after the treatment with derivatives S2 and S5. The same effect was observed for GSTP in the case of compound S2. Resveratrol and its derivatives reduced the NQO2 protein level in HaCaT cells. Thus, it is possible that increased expression of GSTP or GSTM and GST activity was linked with NQO2 inhibition in these cells. The results of this study indicate that resveratrol and its methylthioderivatives activate Nrf2 not only in the mouse epidermis, but also in human keratinocytes. Upregulating GST isozymes might be particularly important for deactivating chemical carcinogens, such as PAH.

14

Tissue localization of the condensed tannins in the leaves of the black cherry, Prunus serotina Ehrh.

72%

Halarewicz A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2011

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tom 14

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nr 4

15

Skin immunity

72%

Matejuk A.

Archivum Immunologiae et Therapiae Experimentalis

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2018

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tom 66

|

nr 1

16

Epidermis leaf structural responses of some aquatic plants to constant water environment

72%

Nedukha O. M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2010

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tom 545

Submersed leaves of Myriophyllum spicatum, Potamogeton perfoliatus, and P. pectinatus were studied by the method of the transmission electron microscopy. Ultrastructural analysis of leaf epidermis of the three hygrophyte species showed the presence of some peculiarities of leaf epidermis, in particular, the presence of chloroplasts with very well developed grana structure, three-layered structure of outer cell wall, thin cuticle with pores. The distinctive peculiarities of the cell ultrastructure of the studied samples were also revealed in the epidermis. The size of pore in leaf cuticle of submerged plants depends on the plant species. There were the quantitative and qualitative signs of substructures of chloroplasts, thickness of outer cell wall and its cuticle layer, the size and density of cuticle pores. Structural features of the submersed leaf epidermal cells in different species demonstrate their role in the submersed phenotypical plasticity and in natural adaptation of plants to the constant water environment.

17

Chiral changes of cortical microtubule orientations in epidermis of sunflower hypocotyls. The effect of blue and red light

72%

Burian A.

Acta Societatis Botanicorum Poloniae

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2007

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tom 76

|

nr 4

269-275

Light and developmental processes affect the cortical microtubule (cMT) orientation. The cMT orientation with a special regard to its chirality was analyzed under the outer epidermal cell walls in different regions of sunflower hypocotyls kept in darkness and after irradiation with blue and red light. The results show that the cMT orientation depends on the cell position along hypocotyl, but generally cMTs are oblique. The oblique orientation has defined chirality: either of Z-form (right-handed) or S-form (left-handed). In the lower region of hypocotyls the Z-form dominates. After irradiation of hypocotyls with blue light this domination has been maintained and appeared also in the upper region. In contrast, after irradiation with red light the Z-form domination has not been apparent. It is proposed that in darkness, variations of cMT orientations in the epidermis along the hypocotyl are due to developmental processes, while blue and red light affect the cMT orientation via "shifting" these processes backward and forward, respectively.

18

Quantifiable differences between phytolith assemblages detected at species level: analysis of the leaves of nine Poa species (Poaceae)

72%

Lisztes-Szabo Z., Kovacs S., Balogh P., Daroczi L., Penksza K., Peto A.

Acta Societatis Botanicorum Poloniae

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2015

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tom 84

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nr 3

The taxonomie value of phytolith assemblages and their degree of variability within different species of the same genus is still an undervalued issue in the botanical range of phytolith studies. However the understanding of grass phytolith variance and its implications to plant systematics is doubtless. In the present study phytoliths of the lateral shoots (leaves) of nine, globally distributed Poa species (Pooideae - Poaceae) are described. Phytoliths were recovered from Poa specimens by the dry ashing technique. Altogether 6223 disarticulated phytoliths were counted (approximately 500-700 phytoliths per species) in 54 plant samples, which cover six shoots of nine species. Not only the relative frequency of each morphotype was calculated, but measurements were conducted to determine the biogenic silica content of Poa lateral shoots. A phytolith reference collection for the nine selected species of a worldwide importance was also compiled. The description of the most significant phytolith morphotypes and their taxonomic relationships are given here. Results suggest that the biogenic silica content of the Poa lateral shoots was determined to be relatively high within all nine species. Phytolith assemblage data was subjected to multivariate statistical analyses (e.g., CA and PCA) in order to find differences and similarities among the nine Poa species. Results show that the two closely related Poa of the P. pratensis species group, namely the P. pratensis and P. angustifolia, only slightly differ from the other Poa species if we consider their rondel-trapeziform short cells (SC) phytolith frequencies.

19

The method to study inner cell wall surface using AFM

72%

Grelowski M., Natonik S., Kwiatkowska D.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

|

nr 3

20

DNA level in guard cells nuclei of Ornithogalum umbellatum ovary is 2C-4C

72%

Rogala K., Kwiatkowska M., Poplonska K.

Acta Societatis Botanicorum Poloniae

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2008

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tom 77

|

nr 3

207-211

The DNA content after Feulgen reaction in the guard cells and epidermis of Omithogalum umbellatum ovary was cytophotometrically measured in different phases of flower development. Only in bud of flowers guard cells DNA content was 2C while in full blown flowers it was higher, between 2C-4C. This observation was supported by autoradiographic studies with 3H-thymidine which was incorporated into guard cell nuclei in the ovary epidermis of newly developed flowers. Thus DNA level in O. umbellatum guard cells was higher than those in other plants described in literature. On the other hand, DNA content in the epidermis cells increased gradually with ovary growth reaching the maximum level of 8C in some cells.

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