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Wyświetlanie 1-15 z 43
Tytuł:
Alteration of plasma membrane NADPH oxidase and NADP-recycling enzymes in cucumber roots stressed with cadmium
Autorzy:
Jakubowska, D.
Kabala, K.
Reda, M.
Janicka-Russak, M.
Powiązania:
https://bibliotekanauki.pl/articles/80528.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
plasma membrane
NADPH oxidase
glucose-6-phosphate dehydrogenase
6-phosphogluconate dehydrogenase
malic enzyme
isocitrate dehydrogenase
cucumber
root stress
heavy metal
cadmium
enzyme activity
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenolic compounds and properties of antioxidants in grapevine roots [Vitis vinifera L.] under drought stress followed by recovery
Autorzy:
Weidner, S
Karolak, M.
Karamac, M.
Kosinska, A.
Amarowicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/59363.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
soil condition
drought stress
oxidative stress
root
Vitis vinifera
seedling
plant root
phenolic compound
root tissue
grape-vine
soil moisture
antioxidative system
Opis:
Grapevine seedlings Vitis vinifera were grown in a greenhouse under optimum conditions (soil moisture ca 70%) and under drought stress (soil moisture ca 35%). In addition, some of the plants subjected to drought underwent subsequent regeneration under optimum conditions. Drought stress caused accumulation of total phenolic compounds in grapevine roots, which may indicate that these compounds play an important role in the adaptation of roots to growth under stress conditions. Phenolic acids found in the roots occurred in the ester-bound form only. p-coumaric acid was present in the highest concentrations (6.2 to 10.5 µg/g fresh matter). The content of ferulic acid was lower, ranging from 2.4 to 4.6 µg/g fresh matter. The lowest concentration in grapevine roots was achieved by caffeic acid (2.4 to 2.9 µg/g fresh matter). The levels of p-coumaric and ferulic acids in roots rose significantly under the drought stress, while the concentration of caffeic acid increased during the post-drought recovery period. This may suggest that some of the phenolic acids protect plants under stress conditions. All the extracts from grapevine roots had antioxidative properties, but the antiradical activity of the extracts obtained from roots subjected to drought stress was inferior to the control. The same extracts were also characterised by depressed reducing power. The results imply that tolerance of grapevine to soil drought may be associated with the value of antioxidative potential in root tissues of these plants.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 97-103
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical stress-induced reorganization of the root stem cell niche of Arabidopsis seedlings cultured in vitro
Autorzy:
Potocka, I.
Powiązania:
https://bibliotekanauki.pl/articles/951229.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical stress
root system
stem cell
niche
root meristem
Arabidopsis thaliana
root apical meristem
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulation of cytochrome b-561 protein family in maize (Zea mays L.) roots by iron and cadmium stress
Autorzy:
Ramanathan, K.
Luthje, S.
Powiązania:
https://bibliotekanauki.pl/articles/79976.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
maize
Zea mays
root
abiotic stress
cytochrome b561
protein level
real-time polymerase chain reaction
maize root
cadmium stress
iron stress
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the development and structure of Raphanus sativus L. var. radicula Pers. root under aluminum stress conditions
Zmiany w rozwoju i budowie korzeni rzodkiewki (Raphanus sativus L. var. radicula Pers) w warunkach stresu glinowego
Autorzy:
Konarska, A.
Powiązania:
https://bibliotekanauki.pl/articles/11364491.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant anatomy
plant morphology
stress condition
root development
radish
root
aluminium stress
structural change
root structure
aluminum zob.aluminium
Raphanus sativus var.radicula
aluminium toxicity
Opis:
Roots of radish (Raphanus sativus L. var. radicula Pers.) of Rowa cv. seedlings grown in water cultures (pH 4.3) have been tested. Aluminum as AlCl₃·6H₂O has been applied at 0, 10, 20 and 40 mg·dm⁻³ concentrations. Inhibition of the growth of root elongation and the following changes of root morphology have been observed after aluminum treatment: browning and thickening, root cap elongation or falling off, bending of the apex root and cracks on its surface. Roots have been characterized with the change of hair length and lateral zones. First lateral roots occurred closer to the basal root apex than first hair. Reduction of hair length was noticed too. Atrophy of outer root tissues has been accompanied by great enlargement of cortex cells size as a result of their hypertrophy.
Badano korzenie siewek rzodkiewki ‘Rowa’ (Raphanus sativus L. Var. radicula Pers.) hodowanych w kulturach wodnych o pH 4,3. Glin zastosowano w stężeniach: 0, 10, 20 i 40 mg·dm⁻³ w formie AlCl₃·6H₂O. W obecności glinu obserwowano inhibicję wzrostu elongacyjnego korzeni oraz zmiany w ich morfologii: brązowienie, wydłużanie się lub odpadanie czapeczki, zaginanie się szczytowego odcinka korzenia oraz spękania na jego powierzchni. Korzenie o znacznie powiększonej średnicy odznaczały się zmianą długości i układu stref korzeniowych: włośnikowej i korzeni bocznych oraz redukcją długości włośników. Obumieraniu tkanek obwodowej strefy korzenia towarzyszyło znaczne powiększenie rozmiarów komórek kory w wyniku ich hipertrofii.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2005, 04, 1; 85-97
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking a tool during the preparation of root canals. The methodology of management with a case report
Autorzy:
Kardasz, P.
Wilczyńska-Borawska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1916713.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
root canal treatment (RCT)
stress fracture
torsional
mechanical preparation
Opis:
Background: Breaking an endodontic instrument is a complication that really hinders or even makes impossible complete disinfection and tight obturation of the root canal system. Case presentation: A 74-year-old patient suffered a fracture of the clinical crown of the second incisor in the maxilla. The examination revealed necrotic pulp and the presence of obliteration significantly limiting the lumen of the tooth canal. It was decided to perform root canal treatment and then to do a reconstruction reinforced by crown-root inlay. An endodontic instrument was broken in the lumen of the root canal at the beginning of the endodontic treatment. A broken piece tightly filled nearly 80% of the total length of the canal. It was decided to use endodontic forceps to remove the fragment.Conclusion: Choosing the right method is a key step in the complication described above. The management technique should entail the least risk of iatrogenic complications because they can greatly affect the long-term maintenance of the tooth. The article discuss on the basis of current literature standards of conduction in the case of tool breakage in the root canal system and presents the problem on the basis of own experience.
Źródło:
Progress in Health Sciences; 2015, 5, 1; 271-275
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of adsorption methods to determine the effect of pH and Cu-stress on the changes in the surface properties of the roots
Autorzy:
Szatanik-Kloc, A.
Powiązania:
https://bibliotekanauki.pl/articles/25964.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
adsorption method
adsorption energy
water vapour
determination
pH
copper
plant stress
surface property
root
plant root
Opis:
Rye plants were grown in a nutrient solution prepa- red according to Hoagland for 2 weeks at pH 7, next for 14 days at pH 4.5 (without Cu+2) and in the presence of 20, 50, or 100 mg dm-3 copper ions. The control plants were grown continuously at pH 7. The physicochemical surface properties of the roots were exa- mined using two adsorbates – polar (water vapour) and non-polar (nitrogen). The surface properties of the roots grown at pH 4.5 without Cu+2 were apparently the same as those of controls. The roots of rye which grew in the presence of Cu+2 were characte- rized by lower (relative to controls) specific surface area values. Statistically significant differences in the size of the apparent surface area (determined by water vapour) were reported for roots in- cubated with copper ions at a concentration of 20 and 50 mg dm-3. The average water vapour adsorption energy of the root surface decreased under the stress conditions. There were no statistically significant differences for the free surface area and characteristic energy of nitrogen adsorption.
Źródło:
International Agrophysics; 2014, 28, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examining organic acid root exudate content and function for leafy vegetables under water-stressed conditions
Autorzy:
Kasukawa, N.
Miyazawa, K.
Powiązania:
https://bibliotekanauki.pl/articles/1077275.pdf
Data publikacji:
2020
Wydawca:
Instytut Ogrodnictwa
Tematy:
leaf vegetable
cabbage
abiotic stress
drought stress
organic acid
root exudate
antioxidant enzyme
catalase
ascorbate peroxidase
Opis:
At the plants’ exposal to abiotic stress, organic acids, including citric acid, are exuded through their roots. Previous studies have suggested that the exogenous application of citric acid increases antioxidant activity within the plant. Thus, we postulated that organic acids released into the surroundings during times of environmental stress may function as signaling molecules to increase antioxidant enzyme activity. To gain further insight into this phenomenon, we identified individual organic acids exuded from the roots of leafy vegetables under drought stress. We then analyzed enzyme activity and the root/shoot lengths of seedlings after treatment with the types of organic acids found to be exuded from the studied leafy vegetables, including acetic, citric, lactic, and tartaric acids. There was a significant increase in catalase and ascorbate peroxidase enzyme activity in Napa cabbage (Brassica rapa var. pekinensis) after exogenous citric acid application. Root lengths of cabbage (Brassica oleracea var. capitata) and Napa cabbage seedlings were significantly longer in citric and lactic acids pretreated seedlings compared to those of the control. The above results support the conclusion that exogenous application of citric acid alleviates drought stress. However, there is insufficient evidence to prove that organic acids act as signaling molecules to prime neighboring plants for upcoming stress.
Źródło:
Journal of Horticultural Research; 2020, 28, 2; 83-90
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genotypic variation in response to iso-osmotic and soil moisture stresses among old and modern cultivars of winter wheat
Autorzy:
Mendel, M
Gorny, A G
Powiązania:
https://bibliotekanauki.pl/articles/2047709.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Triticum spelta
drought stress
mannitol
wheat
soil
old cultivar
transpiration
moisture stress
Triticum aestivum
modern cultivar
root
Opis:
The study was performed to evaluate range of the genotypie variation in drought susceptibility at juvenile growth stages among 23 old and modern winter cultivars of Triticum aestivum and one old cv. of T. spelta. Response of germinated seeds to mannitol-simulated drought stress as well as that in seedling shoot and root growth, water use and leaf transpiration under varied soil moisture were measured. Considerable genotypie variation for all morpho-physiological traits was found between wheat cultivars. There were significant differences between the older and modern cultivars. The former showed usually an enhanced rooting ability and higher water requirements, while the newer indicated more efficient water use. The older cultivars were more resistant to both iso-osmotic stress and low soil moisture at the juvenile growth stage. However, no clear differences were found between the two groups of cultivars in the variation range of the drought susceptibility indices. Complex patterns of the response to drought were observed. Cultivars, which distinguished by both a lower shoot : root ratio and a stronger drought-induced stimulative root growth, tended to be more resistant. Although only moderate the relationships noticed, a consideration of the root plasticity screening in local wheat breeding appears to be justified.
Źródło:
Journal of Applied Genetics; 1996, 37, 1; 49-63
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the ultrastructure of Capsicum annuum L. seedlings roots under aluminum stress conditions
Zmiany w ultrastrukturze korzeni siewek Capsicum annuum L. w warunkach stresu glinowego
Autorzy:
Konarska, A
Powiązania:
https://bibliotekanauki.pl/articles/28470.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
stress condition
ultrastructural change
root
aluminium stress
Capsicum annuum
seedling
plant
aluminum zob.aluminium
red pepper
Opis:
The effect of aluminum was investigated on the cell ultrastructure of roots of fourteen-day-old `Trapez` red pepper seedlings grown in water culture. Disorders in the cell structure were observed using transmission electron microscopy (TEM). An analysis of longitudinal sections of the apical region of the control plants’ roots showed that cells of the cap and cells of the meristematic region had an arrangement and shape typical for these root regions, and cell organelles were properly developed. Changes in the cell structure under the infl uence of aluminum involved a reduction in the number of starch grains in the leucoplasts of the cap, the formation of lobate nuclei and a reduction in the number of cisternae in the dictyosomes as well as the damage of the cell membranes. Moreover, the swelling of mitochondria was observed with a simultaneous reduction in the number of mitochondrial cristae or the bursting of the membrane of these structures. In the vacuoles of the investigated root section, the presence of numerous electron-opaque large-sized formations was found, being most probably aluminum deposits. The cell wall, often thickened, was wavy or the formation of two walls in close distance was observed. The obtained results prove the high sensitivity of the studied red pepper cultivar to aluminum stress.
Badano wpływ glinu na ultrastrukturę komórek korzenia czternastodniowych siewek papryki rocznej `Trapez` uprawianych w kulturach wodnych. Zaburzenia struktury komórek obserwowano w transmisyjnym mikroskopie elektronowym (TEM). Analiza podłużnych przekrojów wierzchołkowej strefy korzeni roślin kontrolnych wykazała, że komórki czapeczki i komórki strefy merystematycznej miały układ i kształt typowy dla tych stref korzenia, a organella komórkowe były prawidłowo wykształcone. Zmiany w strukturze komórek pod wpływem glinu polegały na redukcji liczby ziaren skrobi w leukoplastach czapeczki, tworzeniu płatowatych jąder oraz redukcji liczby cystern w diktiosomach, a także uszkodzeniu membran komórkowych. Zaobserwowano ponadto pęcznienie mitochondriów przy jednoczesnym zmniejszaniu się liczby grzebieni mitochondrialnych lub pękaniu otoczki tych struktur. W wakuolach badanego odcinka korzenia stwierdzono obecność licznych nieprzejrzystych elektronowo tworów o pokaźnych rozmiarach, będących najprawdopodobniej depozytami glinu. Ściana komórkowa była często zgrubiała, pofałdowana lub obserwowano tworzenie się dwu ścian w bliskim sąsiedztwie. Uzyskane wyniki świadczą o dużej wrażliwości badanej odmiany papryki na stres glinowy.
Źródło:
Acta Agrobotanica; 2008, 61, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carrot seed germination and plant growth in salt stress condition
Autorzy:
Klimek-Chodacka, M.
Sadlowska, K.
Grzebelus, D.
Baranski, R.
Powiązania:
https://bibliotekanauki.pl/articles/951262.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carrot
Daucus carota
seed germination
plant growth
salt stress
stress condition
root vegetable
electrical conductivity
sodium chloride
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular and physiological aspects of the role of root hairs during drought stress in barley
Autorzy:
Kwasniewski, M.
Daszkowska-Golec, A.
Chwialkowska, K.
Janiak, A.
Szarejko, I.
Powiązania:
https://bibliotekanauki.pl/articles/80581.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
physiological aspect
molecular aspect
root hair
drought stress
barley
photosynthesis
photosynthetic apparatus
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The relation of actual to potential evapotranspiration as an indicator of plant water stress for meadow plant cover
Autorzy:
Baranowski, P.
Mazurek, W.
Walczak, R.T.
Powiązania:
https://bibliotekanauki.pl/articles/1402606.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
root system
temperature measurement
soil water
thermography
meadow
crop water stress
evapotranspiration
plant cover
Penman-Monteith method
water stress
plant
Źródło:
Acta Agrophysica; 2001, 53
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenolic compounds and properties of antioxidants in grapevine roots [Vitis vinifera L.] under low-temperature stress followed by recovery
Autorzy:
Weidner, S
Kordala, E.
Brosowska-Arendt, W.
Karamac, M.
Kosinska, A.
Amarowicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/57473.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
oxidative stress
environment condition
plant growth
root
Vitis vinifera
phenolic compound
chill stress
plant development
grape-vine
antioxidative system
Opis:
The research has been performed on roots of Vitis vinifera, cv. Himrod, obtained from seedlings grown under chill stress conditions (+10oC in the day and +7oC at night), under optimum conditions (+25oC in the day and +18oC at night) and from seedling which underwent a recover period after the chill stress treatment. The purpose of the study has been to determine quantitative and qualitative changes in phenolic compounds as well as to demonstrate changes in antiradical properties of extracts from grapevine roots, which appeared as a result of chill stress and during recovery under the optimum conditions following the stress. Phenolic compounds from grapevine roots were extracted using 80% acetone. The total content of phenolics was determined by colorimetry. The content of tannins was tested by precipitation with bovine serum albumin. The reducing power as well as DPPH• free radical and ABTS+• cation radical scavenging activity of the extracts were also tested. In order to identify phenolic compounds present in the extracts the RP-HPLC technique was employed. The tested material was found to contain tannins and three identified phenolic acids: ferulic, caffeic and p-coumaric ones. The latter occurred in the highest concentrations (from 4.46 to 6.28 µg/g fresh matter). Ferulic acid appeared in smaller amounts (from 1.68 to 2.65 µg/g fresh matter), followed by caffeic acid (from 0.87 to 1.55 µg/g fresh matter). Significantly less total phenolic compounds occurred in roots of seedlings subjected to chill stress. However, the total content of these compounds increased significantly in roots of plants which underwent recovery after chill stress. Concentration of tannins was determined by two methods. The content of condensed tannins was depressed in roots as a result of low temperature stress, whereas the content of condensed and hydrolysing tannins (determined via the BSA method) rose under chill stress conditions. A significant increase in tannins in root extracts (determined with both methods) was found during the recovery process after the stress. The three identified phenolic acids appeared in grapevine roots as ester-bound compounds. It has been demonstrated that the content of phenolic acids significantly fell as a result of low temperatures, but increased during recovery after chill stress. The weakest ability to scavenge DPPH• and ABTS+• free radicals as well as the reducing power were shown by the extract obtained from grapevine roots from the seedlings subjected to chill stress. Both free radical scavenging activity and reducing power were observed to increase considerably during recovery after stress. This seems to prove that during the recovery process following chill stress the synthesis of antioxidative compounds in grapevine roots is much more intensive.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 279-286
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gamma-tubulin distribution in root cells of soybean (Glycine max L.) seedlings under cadmium stress
Autorzy:
Gzyl, J.
Przymusinski, R.
Gwozdz, E.A.
Powiązania:
https://bibliotekanauki.pl/articles/80983.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
microtubule
gamma-tubulin
root cell
soybean
Glycine max
seedling
cadmium stress
heavy metal
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
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