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    Wyświetlanie 1-9 z 9
    Tytuł:
    Intraspecific differentiation of reed grass Calamagrostis arundinacea [L.] Roth [Poaceae] populations revealed by peroxidase allozymes
    Autorzy:
    Krzakowa, M
    Celka, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/58313.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    intraspecific differentiation
    reed grass
    Calamagrostis arundinacea
    Poaceae
    plant population
    peroxidase allozyme
    natural population
    Polska
    peroxidase
    geographic region
    Opis:
    The genetic Variation of Reed Grass Calamagrostis arundinacea (L.) Roth was investigated in 25 populations in various geographic regions of Poland. A total of 907 individuals were sampled for electrophoretic analysis of peroxidase loci (11 allozymes). Populations were characterised by genetic parameters e.g. heterozygosity level, Wright's fixation index (F) and polymorphism coefficient (Pg). Mean values of interpopulation variability level (GST=0.0310), total genetic diversity (HT=0.4102) and gene flow between populations (Nm=7.805) were also examined. All the populations were polymorphic and they remain in Hardy Weinberg equilibrium.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 4; 299-304
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the ascorbate-glutathione system during storage of recalcitrant seeds of Acer saccharinum L.
    Autorzy:
    Ratajczak, E
    Pukacka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/57429.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    ascorbate-glutathione system
    ascorbate peroxidase
    storage
    seed
    Acer saccharinum
    monodehydroascorbate reductase
    Opis:
    Two seed lots of Acer saccharinum (recalcitrant), with an initial moisture content of 50% and 55%, were stored at +3oC for 6 months. After this time, their viability (measured as germinability) reached 100% and 30%, respectively. In embryo axes and cotyledons extracted from seeds, two major low molecular antioxidants were assayed: ascorbate (ASA and DHA) and glutathione (GSH and GSSG); and activities of enzymes of the ascorbate-glutathione cycle were measured: ascorbate peroxidase (APO) (E.C. 1.11.1.11), monodehydroascorbate reductase (MR) (E.C. 1.6.5.4), dehydroascorbate reductase (DHAR) (E.C. 1.8.5.1), and glutathione reductase (GR) (E.C. 1.6.4.2.). GSH and GSSG contents of embryo axes of stored seeds decreased, as compared to the control (fresh, non-stored seeds), but a larger decrease was observed in seeds with 30% viability. In cotyledons, a particularly high increase in the GSH content in relation to the control was observed in seeds with 100% viability, while the GSSG content was significantly lower in both stored seed lots than in the control. The ASA level was twice as high in seeds with 30% viability as in the control, both in embryo axes and in cotyledons. The activity of enzymes of the ascorbate-glutathione cycle was higher in embryo axes than in cotyledons. In embryo axes of seeds with 100% viability, enzyme activities were slightly lower than in the control, while in those of seeds with 30% viability, their activities were higher than in the control. The observed changes in activities of enzymes of the ascorbate-glutathione cycle and in ascorbate and glutathione levels suggest that the stored seeds of A. saccharinum have an active antioxidant system, which plays an important role in maintaining their viability during storage.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 1; 23-27
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of seedling chilling on glutathione content, catalase and peroxidase activity in Brassica oleracea L. var. italica
    Autorzy:
    Wojciechowska, R.
    Hanus-Fajerska, E.J.
    Kolton, A.
    Kaminska, I.
    Grabowska, A.
    Kunicki, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/57934.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    seedling
    chilling stress
    glutathione content
    catalase activity
    peroxidase activity
    Brassica oleracea var.italica
    broccoli
    development stage
    Opis:
    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.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glutathione-dependent responses of plants to drought: a review
    Autorzy:
    Labudda, M.
    Azam, F.M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/58164.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    abiotic stress
    plant response
    glutathione peroxidase
    glutathione S-transferase
    reactive oxygen species
    S-glutathionylation
    water deficit
    drought
    Opis:
    Water is a renewable resource. However, with the human population growth, economic development and improved living standards, the world’s supply of fresh water is steadily decreasing and consequently water resources for agricultural production are limited and diminishing. Water deficiency is a significant problem in agriculture and increasing efforts are currently being made to understand plant tolerance mechanisms and to develop new tools (especially molecular) that could underpin plant breeding and cultivation. However, the biochemical and molecular mechanisms of plant water deficit tolerance are not fully understood, and the data available is incomplete. Here, we review the significance of glutathione and its related enzymes in plant responses to drought. Firstly, the roles of reduced glutathione and reduced/ oxidized glutathione ratio, are discussed, followed by an extensive discussion of glutathione related enzymes, which play an important role in plant responses to drought. Special attention is given to the S-glutathionylation of proteins, which is involved in cell metabolism regulation and redox signaling in photosynthetic organisms subjected to abiotic stress. The review concludes with a brief overview of future perspectives for the involvement of glutathione and related enzymes in drought stress responses.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison of the effects of drought on proline accumulation and peroxidases activity in leaves of Festuca rubra L. and Lolium perenne L.
    Autorzy:
    Bandurska, H
    Jozwiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/58679.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    red fescue
    grass
    drought
    proline accumulation
    peroxidase
    enzyme activity
    leaf
    Festuca rubra
    Lolium perenne
    lipid peroxidation
    rye-grass
    Opis:
    The effect of soil drought on leaf water content, proline content, and the activity of guaiacol (GuPX) and ascorbate (APX) peroxidases as well as the level of lipid peroxidation were investigated in leaves of drought resistant red fescue (Festuca rubra) and drought sensitive perennial ryegrass (Lolium perenne). Plants were grown under glasshouse conditions in soil pot culture. 26 day-old grasses were exposed to drought by withholding irrigation for 18 days. Water content in leaves of perennial ryegrass decreased more than in red fescue throughout the experimental period. On the other hand, proline content (PC) was higher in red fescue. The activity of APX and GuPX increased in leaves of red fescue, while it did not change in perennial ryegrass. Our data demonstrate that both red fescue and perennial ryegrass were able to survive applied drought, as shown by a lack of stress-induced lipid peroxidation and hence no evidence of oxidative damage. We speculate, that the observed drought stress tolerance at cellular level was associated with the ability to accumulate proline, and to maintain high activity of APX and GuPX, resulting in protection against oxidative damage and lipid peroxidation. It seems that this mechanism works better in red fescue.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 111-116
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Betacyanin accumulation and guaiacol peroxidase activity in Beta vulgaris L. leaves following copper stress
    Autorzy:
    Morales, J.M.L.
    Rodriguez-Monroy, M.
    Sepulveda-Jimenez, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/57381.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    betacyanin accumulation
    guaiacol peroxidase activity
    Beta vulgaris
    red beet
    leaf
    copper stress
    oxidative stress
    betacyanin
    abiotic stress
    antioxidant compound
    lipid peroxidation
    copper
    Opis:
    The effect of copper stress on betacyanin accumulation and guaiacol peroxidase (GPOD) activity in leaves of different age was evaluated in red beet (Beta vulgaris L. var. Crosby Egyptian) plants. In hydroponic culture, plants were treated with 0.3 μM (control), 50 μM, 100 μM, and 250 μM of CuSO4 for 6 days. Copper was taken up and accumulated in old roots but was not translocated to leaves. However in young leaves, the increase of lipid peroxidation and reduction of growth were evident from day 3 of copper exposure; whereas in old leaves, the lipid peroxidation and growth were the same from either copper-treated or control plants. In response to copper exposure, the betacyanin accumulation was evident in young leaves by day 3, and continued to increase until day 6. Betacyanin only were accumulated in old leaves until day 6, but the contents were from 4 to 5 times lower than those observed in young leaves at the same copper concentrations. GPOD activity increased 3.3- and 1.4-fold in young and old leaves from day 3 of copper treatment respectively, but only in the young leaves was sustained at the same level until day 6. Old roots shown betacyanin in the control plants, but the betacyanin level and growth were reduced with the copper exposure. In contrast, young roots emerged by copper effect also accumulated copper and showed the highest betacyanin content of all plant parts assayed. These results indicate that betacyanin accumulation and GPOD activity are defense responses to copper stress in actively growing organs.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of the method of application and concentration of Asahi SL on the response of cucumber plants to chilling stress
    Wpływ sposobu aplikacji i stężenia Asahi SL na reakcję roślin ogórka na chłód
    Autorzy:
    Borowski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/27885.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    application method
    concentration
    Asahi SL preparation
    plant response
    cucumber plant
    chilling stress
    plant stress
    electrolyte
    proline
    catalase
    peroxidase
    photosynthetic pigment
    gas exchange
    Opis:
    In pot experiments conducted on cucumber cv. Śremski F1, the effect was studied of short-term chilling stress on plants which had grown from seeds germinating in the solution of Asahi SL or treated with this biostimulator during the early growth period. The plants were grown in a phytotron at an air temperature of 27/22ºC (day/night), using fluorescent light with FAR flux density of 220 μmol x m-2 x s-1 and with a photoperiod of 16/8. The biostimulator was applied using the following methods: a) germination of seeds in 0.01% and 0.05% solution, b) watering of plants twice with 0.01% or 0.05% solution, c) spraying leaves with 0.3% or 0.5% solution. Plants sprayed with distilled water were the control. After 24 hours from foliar or root application of Asahi SL, one half of the plants from each experimental series was treated for a period of 3 days at a temperature of 12/6ºC, with all the other growth conditions unchanged. The obtained results show that short-term chilling stress caused a significant increase in electrolyte leakage, free proline content and in the activity of ascorbate peroxidase in leaves, but a decrease in the content of chlorophyll, its maximum fluorescence (Fm) and quantum yield (Fv/Fm), carotenoid content, stomatal conductance, transpiration, photosynthesis, leaf biomass and in the activity of catalase in leaves. Foliar or root application of Asahi SL in the pre-stress period decreased the values of the traits which increased as a result of chilling or increased those which decreased. Higher concentrations of the biostimulator solutions, applied using this method, were more effective. The application of the biostimulator during seed germination did not result in significant changes in the response of plants to chilling stress.
    Źródło:
    Acta Agrobotanica; 2010, 63, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response to chilling in cucumber (Cucumis sativus L.) plants treated with triacontanol and Asahi SL
    Reakcja na chłód roślin ogórka traktowanych triakontanolem i Asahi SL
    Autorzy:
    Borowski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/28418.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant protection
    triacontanol
    Asahi SL preparation
    plant response
    chilling
    cucumber plant
    Cucumis sativus
    plant stress
    biostimulator
    proline
    catalase
    peroxidase
    photosynthetic pigment
    gas exchange
    Opis:
    In pot experiments on cucumber cv. Śremski F1, the effect of short-term chilling on plants earlier treated with triacontanol (TRIA) and Asahi SL was investigated. These plants were grown in a phytotron at an air temperature of 27/22ºC (day/night), using fluorescent light with far flux density of 220 μmol x m-2 x s-1, with a photoperiod 16/8. At the 4th true leaf stage, the respective experimental series were sprayed with: 1) H2O – control, 2) TRIA 0.01, 3) TRIA 0.1, 4) TRIA 1.0 mg x dm-3, 5) Asahi SL 0.2, 6) Asahi SL 0.3%. After 24 hours one half of the plants from each experimental series was treated for a period of 3 days at a temperature of 12/6ºC, with all the other growth conditions unchanged. The obtained results have shown that short-term chilling stress caused a significant increase in electrolyte leakage, free proline content and in the activity of guaiacol peroxidase in leaves, but a decrease in chlorophyll a+b content, stomatal conductance, transpiration, photosynthesis, leaf area and in the activity of catalase in leaves. The application of TRIA or ASAHI SL on leaves in the pre-stress period reduced the values of the traits which had been increased as a result of chilling and increased those which had reduced. Generally, TRIA was most effective at a concentration of 0.1 mg x dm-3, and Asahi SL at a concentration of 0.3%.
    W doświadczeniach wazonowych prowadzonych na ogórku odm. Śremski F1 badano wpływ okresowego chłodu na rośliny wcześniej traktowane triakontanolem (TRIA) i Asahi SL. Rośliny rosły w fitotronie w temp. powietrza 27/22ºC (dzień/noc), korzystając ze światła fluorescencyjnego o gęstości strumienia FAR 220 μmol x m-2 x s-1, przy fotoperiodzie 16/8. W fazie 4-tego liścia właściwego odpowiednie serie doświadczalne opryskano: 1) H2O – kontrola, 2) TRIA 0.01, 3) TRIA 0.1, 4) TRIA 1.0 mg x dm-3, 5) Asahi SL 0.2, 7) Asahi SL 0.3%. Po 24 godzinach połowę roślin z każdej serii doświadczalnej traktowano przez okres 3 dni temp. 12/6ºC przy niezmienionych pozostałych warunkach wzrostu. Uzyskane wyniki wykazały, że okresowy chłód wywołał istotny wzrost stopnia wypływu elektrolitów, zawartości wolnej proliny i aktywności peroksydazy gwajakolowej w liściach, spadek zaś zawartości chlorofilu „a+b”, przewodności szparkowej, transpiracji, fotosyntezy, powierzchni liści i aktywności w nich katalazy. Aplikacja na liście w okresie przedstresowym TRIA lub ASAHI SL obniżyła wartość tych cech, które w wyniku chłodu uległy podwyższeniu, a podwyższyła te które uległy obniżeniu. Na ogół najbardziej skuteczny był TRIA w stężeniu 0.1 mg x dm-3, a Asahi SL w stężeniu 0.3%.
    Źródło:
    Acta Agrobotanica; 2009, 62, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aktywnosc beta-glikozydazy i peroksydazy w siewkach lubinu zoltego infekowanych Fusarium oxysporum f. sp. lupini
    Beta-glycosidase and peroxidase activity in yellow lupin seedling infected by Fusarium oxysporum f. sp. lupini
    Autorzy:
    Rybus-Zajac, M
    Morkunas, I
    Powiązania:
    https://bibliotekanauki.pl/articles/27357.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    zamieranie roslin
    beta-glikozydaza
    aktywnosc enzymatyczna
    choroby grzybowe
    enzymy
    infekcja grzybowa
    gnicie korzeni
    Fusarium oxysporum f.sp.lupini
    lubin zolty
    mechanizmy obronne
    choroby roslin
    zgorzel przedwschodowa
    zmiany morfologiczne
    peroksydaza
    siewki
    grzyby chorobotworcze
    plant decline
    beta-glycosidase
    enzyme activity
    fungal disease
    enzyme
    fungal infection
    root decay
    yellow lupin
    defense mechanism
    plant disease
    morphological change
    peroxidase
    seedling
    pathogenic fungi
    Opis:
    Lupine diseases caused by pathogenic fungi constitute a serious problem in agriculture. They lead to partial yield loss and deterioration of crop quality through the changes in biochemical composition of seeds or their contamination with mycotoxins. Some of common lupine diseases are fusarioses caused by Fusarium oxyspomm f. sp. lupini. Morphometric and metabolic changes were investigated in yellow lupine seedlings infected with F. oxyspomm f. sp. lupini. It was found that infection caused temporary inhibition of seedling growth, overcome at later development, and activation of ß-glycosidase and peroxidases. The changes in enzymes activity indicate the induction of defense mechanism against F. oxyspomm f. sp. lupini and inhibition of pathogen spread.
    Choroby łubinu powodowane przez grzyby chorobotwórcze stanowią poważny problem w rolnictwie. Prowadzą do zniszczenia części plonu oraz pogorszenia jego jakości, poprzez zmiany w składzie biochemicznym nasion lub zakażenie ich mykotoksynami. Do powszechnie występujących chorób łubinu zaliczane są fuzariozy powodowane przez Fusarium oxysporum f. sp. lupini. Badano zmiany morfologiczne oraz metaboliczne w siewkach łubinu żółtego infekowanych F. oxysporum f. sp. lupini. Stwierdzono, że infekcja spowodowała okresowe zahamowanie wzrostu siewek, przełamane w dalszej fazie ich rozwoju oraz aktywację ß-glikozydazy oraz peroksydaz. Poinfekcyjne zmiany aktywności enzymów wskazują na uruchamianie mechanizmu obronnego względem F. oxysporum f. sp. lupini i zahamowanie rozprzestrzeniania się patogena.
    Źródło:
    Acta Agrobotanica; 2005, 58, 2; 103-110
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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