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    Wyświetlanie 1-13 z 13
    Tytuł:
    Characterization of an acidic α-galactosidase from hemp (Cannabis sativa L.) seeds and its application in removal of raffinose family oligosaccharides (RFOs)
    Autorzy:
    Zhang, Weiwei
    Du, Fang
    Tian, Guoting
    Zhao, Yongchang
    Wang, Hexiang
    Ng, Tzi
    Powiązania:
    https://bibliotekanauki.pl/articles/1038364.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    α-galactosidases
    Cannabis sativa L.
    purification
    raffinose family oligosaccharides
    Opis:
    An acidic α-galactosidase designated as hemp seed α-galactosidase (HSG) was purified from hemp (Cannabis sativa L.) seeds. By means of chromatographic procedures which involved chromatography on the cation-exchangers CM-cellulose and SP-Sepharose, chromatography on the anion-exchangers DEAE-cellulose and Q-Sepharose, and gel filtration on Superdex 75 using fast protein liquid chromatography, HSG was purified to electrophoretic homogeneity. Results of SDS-PAGE and gel filtration on FPLC Superdex 75 revealed that the enzyme was a monomeric protein with a molecular weight of 38 kDa. Sequences of the inner peptides of the α-galactosidase obtained by MALDI-TOF-MS showed that HSG was a novel α-galactosidase since there was a little similarity to the majority of α-galactosidases recorded in the literature. A pH of 3.0 and a temperature of 50°C were optimal for the activity of the enzyme. The activity of HSG was inhibited by the chemical modification with N-bromosuccinimide (NBS) reagent. HSG contained 16 tryptophan residues and two tryptophan residues on the surface, which were crucial to the α-galactosidase activity. The heavy metal ions Cd2+, Cu2+, Hg2+ and Zn2+ inhibited its activity. The Km and Vmax for the hydrolysis of pNPGal (4-nitrophenyl α-D-galactopyranoside) were respectively 0.008 mM and 68 μM min-1 mg-1. HSG also catalyzed the hydrolysis of raffinose and other natural substrates. Hence the α-galactosidase possesses a tremendous potential for food and feed industries in the elimination of indigestible oligosaccharides from leguminous products.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 3; 383-389
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on soluble carbohydrates in yellow lupin [Lupinus luteus L.] seeds of different age
    Autorzy:
    Zalewski, K
    Lahuta, L.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/58378.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    soluble carbohydrate
    yellow lupin
    lupin
    Lupinus luteus
    seed
    different age
    raffinose
    cyclitol
    aging
    Opis:
    Yellow lupin seeds cv. Juno were stored under laboratory conditions for 2 month, 4, 6 and 8 years. Eighteen soluble carbohydrates were identified in embryonic axes and cotyledons of different age seeds. The concentration of soluble carbohydrates in analysed seeds ranged from 25 to 34% of dry mass. Axes contained more carbohydrates than cotyledons. Stachyose dominated in axes, and verbascose - in cotyledons. Other detected galactosides were: galactinol, galactosyl pinitols and galactosyl chiro-inositols (fagopyritols), but their content was several-fold lower than that of RFOs (in both axes and cotyledons tissues). The concentration of soluble carbohydrates indicated, that sucrose to RFOs mass ratio, or other changes in sugars composition are not indicators of seed storage.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 4; 309-312
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of exogenous abscisic acid on accumulation of raffinose family oligosaccharides and galactosyl cyclitols in tiny vetch seeds [Vicia hirsuta [L.] S.F.Gray]
    Autorzy:
    Lahuta, L B
    Gorecki, R.J.
    Gojlo, E.
    Horbowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57525.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    abscisic acid
    vetch
    oligosaccharide
    botany
    raffinose
    Vicia hirsuta
    galactosyl cyclitol
    seed
    Opis:
    The role of the abscisic acid (ABA) in biosynthesis of raffinose family oligosaccharides (RFOs) and galactosyl cyclitols (Gal-C) in tiny vetch (Vicia hirsuta [L.] S.F. Gray) seeds was investigated. The ABA was applied through incubation of seed at various stage of its development. The level of RFOs and Gal-C was determined in seed maturing on plant and in seed maturing in vitro. In early stages of V. hirsuta seed development, the ABA activated the biosynthesis of galactinol, although the level of arisen galactinol quickly declined. In the later stages of V. hirsuta seed development ABA had stimulatory effect of RFOs and Gal-C biosynthesis. Influence of ABA on biosynthesis of a-galactosides in Vicia hirsuta seed seems to be dependent on abscisic acid concentration. Low concentration of ABA had stimulatory effect on a-galactosides biosynthesis, but high concentration of ABA inhibited the process.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2004, 73, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inhibition of raffinose family oligosaccharides and galactosyl pinitols breakdown delays germination of winter vetch [Vicia villosa Roth.] seeds
    Autorzy:
    Lahuta, L B
    Goszczynska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/59053.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    legume seed
    seed
    Vicia villosa
    vetch
    winter vetch
    galactosyl pinitol
    germination
    raffinose family oligosaccharide
    Opis:
    Beside RFOs, which are commonly present in legume seeds, seeds of some species contain galactosyl pinitols (GPs). These carbohydrates, like RFOs, have been hypothesized to constitute an important energy and carbon skeletal source during germination. To test this hypothesis we have applied a specific α-galactosidase inhibitor (1-deoxygalactonojirimycin, DGJ) to germinating winter vetch (Vicia villosa Roth.) seeds, containing more galactosyl pinitols than RFOs. The breakdown of RFOs but not that of GPs was completely blocked in both embryonic axes and cotyledons tissues, during the first 18 h of imbibition in DGJ. The inhibitor only decreased the rate of GPs degradation. The inhibitory effect of DGJ on GPs degradation was partially alleviated by addition of sucrose or galactose to DGJ solutions. After three days of germination in water, RFOs and GPs disappeared in axial tissues of seeds imbibed in water, galactose or sucrose. Eighteen-hour imbibition of seeds in DGJ drastically reduced germination, by ca 50%, during the first three days. The inhibitory effect of DGJ decreased during the next seven days of germination. The presence of galactose or sucrose in imbibition solution initially stimulated seed germination, but later this effect was not statistically significant. Our study provides clear evidence that galactosyl pinitols play an important role in early winter vetch seeds germination. Additionally, we suggest that galactosyl pinitols can replace RFOs as reserve material necessary for early germination.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 3; 203-208
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cyclitols in maturing grains of wheat, triticale and barley
    Autorzy:
    Lahuta, L.B.
    Goszczynska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/58624.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cyclitol
    maturing grain
    grain
    wheat
    triticale
    barley
    D-chiro-inositol
    D-pinitol
    carbohydrate
    raffinose
    kestose
    Opis:
    In the present study, the feeding of stem-flag leaf-ear explants of wheat, triticale and barley with d-chiro-inositol and d-pinitol was used for modification of the composition of soluble carbohydrates in grains without genetic transformation of plants. Maturing grains indicated ability to uptake exogenously applied cyclitols, not occurring naturally in cereal plants, and synthesized their a-d-galactosides. The pattern of changes in soluble carbohydrates during grain maturation and germination was not disturbed by the uptake and accumulation of cyclitols. Both, d-chiro-inositol and d-pinitol as well as their a-d-galactosides can be an additional pool of soluble carbohydrates accumulated by maturing grains, without decreasing seeds viability. This is the first report indicating the possibility of introduction of cyclitols with potentially human health benefits properties into cereal grains.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of galactinol synthase activity on RFOs content in developing pea seeds (Pisum sativum L.) subjected to drying and cold
    Autorzy:
    Gojlo, E.
    Szymczak, M.
    Kondrat, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/79856.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    raffinose family oligosaccharide
    galactinol synthase
    pea seed
    Pisum sativum
    legume seed
    drying
    cold
    oligosaccharide content
    carbohydrate content
    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:
    Carbohydrates in Colobanthus quitensis and Deschampsia antarctica
    Autorzy:
    Piotrowicz-Cieslak, A I
    Gielwanowska, I.
    Bochenek, A.
    Loro, P.
    Gorecki, R.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/59067.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    soluble sugar
    monosaccharide
    oligosaccharide
    carbohydrate
    cyclitol
    starch
    vegetative tissue
    Deschampsia antarctica
    sugar
    Colobanthus quitensis
    raffinose
    tissue
    galactosyl cyclitol
    Opis:
    Eight to nineteen ethanol-soluble carbohydrate components were identified in vegetative tissues of Colobanthus quitensis and Deschampsia antarctica. The analysed carbohydrates included: monosaccharides, cyclitols, galactosyl cyclitols, raffinose family oligosaccharides, lichnose family oligosaccharides, kestose family oligosaccharides. The analysed vegetative tissues accumulated from 447 to 139 mg/g d.m. soluble carbohydrates in Colobanthus quitensis, Deschampsia antarctica respectively. The raffinose family oligosaccharides constituted 53.3% in Colobanthus quitensis of the identified soluble carbohydrate component pool. Vegetative tissues accumulated starch in Colobanthus quitensis 20.6 mg/g d.m. and 261.6 mg/g d.m. in Deschampsia antarctica. Anatomical and ultrastructural observations of vegetative part of Colobanthus quitensis and Deschmpsia antarctica revealed the presence of various ergastic materials in intercellular spaces, cell walls and protoplasts. Various parts of these plants contain insoluble, PAS positive polysaccharides in intercellular spaces and in cell walls. Chloroplasts of analysed tissues contained starch. Less starch was visible in young, growing parts of shoots of Colobanthus quitensis and Deschmpsia antarctica, more starch appears in mature, differentiated parts.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biosynthesis of raffinose family oligosaccharides and galactosyl pinitols in developing and maturing seeds of winter vetch [Vicia villosa Roth.]
    Autorzy:
    Lahuta, L B
    Powiązania:
    https://bibliotekanauki.pl/articles/56752.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    biosynthesis
    raffinose family
    oligosaccharide
    galactosyl pinitol
    cyclitol
    galactosyltransferase
    developing seed
    maturing seed
    seed
    winter vetch
    vetch
    Vicia villosa
    Opis:
    Changes in the accumulation of two types of α-D-galactosides: raffinose family oligosaccharides and galactosyl pinitols were compared with changes in the activities of galactosyltransferases during winter vetch (Vicia villosa Roth.) seed development and maturation. Occurrence of galactinol and raffinose in young seeds and changes in activities of galactinol synthase and raffinose synthase during seed development indicated that formation of raffinose oligosaccharides (RFOs) preceded synthesis of galactopinitols. Although transfer of galactose residues into raffinose oligosaccharides increased as seeds were maturing, at late stages of seed maturation the accumulation of galactopinitols was preferred to that of RFOs. In the present study, activities of enzymes transferring galactose moieties from galactinol to D-pinitol forming galactopinitol A, and further transfer of galactose moieties from galactinol to mono- and di-galactopinitol A were detected throughout seed development and maturation. This is a new observation, indicating biological potential of winter vetch seeds to synthesize mono-, di- and tri-galactosides of D-pinitol in a pathway similar to RFOs. The pattern of changes in activities of stachyose synthase and enzymes synthesizing galactopinitols (named galactopinitol A synthase and ciceritol synthase) suggests that formation of stachyose, mono- and di-galactopinitol A (ciceritol) is catalyzed by one enzyme. High correlation between activities of verbascose synthase and enzyme catalyzing synthesis of tri-galactopinitol A from galactinol and ciceritol (named tri-galactopinitol A synthase) also suggests that biosynthesis of both types of tri-galactosides was catalyzed by one enzyme, but distinct from stachyose synthase. Changes in concentrations of galactosyl acceptors (sucrose and D-pinitol) can be a factor which regulates splitting of galactose moieties between both types of galactosides in winter vetch seeds.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 219-227
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Loss of tolerance to desiccation in germinated Norway maple (Acer platanoides L.) seeds. Changes in carbohydrate content
    Autorzy:
    Pukacka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/41745.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    glucose
    stratification
    viability
    fructose
    Acer platanoides
    desiccation
    tolerance loss
    galactose
    seed
    stachyose
    sucrose
    Norway maple
    raffinose
    carbohydrate content
    dormancy
    Opis:
    Carbohydrates were analyzed in Norway maple embryo axes and cotyledons after imbibition, in the middle of cold stratification, before germination and during radicle protrusion to 8-10 mm and 20-25 mm. Simultaneously desiccation tolerance of seeds was determined by tetrazolium (TTC) test, after desiccation of seeds to 10-20% of water content. The cotyledons were tolerant to desiccation throughout all stratification and germination period. Embryo axes became sensitive to desiccation when hypocotyls-radicle protrusion reached 20-25 mm length. In this period the significant increase of monosaccharides: glucose, fructose and galactose in embryo axes occurred. This was not observed in cotyledons. During the germination period significant decrease of sucrose and raffinose content was noted in embryo axes and cotyledons. Relatively less changes appeared in stachyose content in embryo axes while in cotyledons it decreased evidently. The mass ratio of sucrose to oligosaccharides was higher in cotyledons of germinated seeds. The marked decrease of mass ratio of oligo to monosaccharides was observed in embryo axes in the last period of germination. The role of carbohydrates in loosing tolerance to desiccation in germinated Norway maple seeds is discussed.
    Źródło:
    Dendrobiology; 2001, 46
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composition of seed soluble carbohydrates and ultrastructural diversity of testa in lupins from the Mediterranean Region
    Autorzy:
    Piotrowicz-Cieslak, A I
    Powiązania:
    https://bibliotekanauki.pl/articles/56576.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Mediterranean Region
    gas chromatography
    Fabaceae
    Lupinus
    scanning electron microscopy
    seed coat
    lupin
    cyclitol
    carbohydrate
    galactosyl cyclitol
    raffinose family oligosaccharide
    seed
    Opis:
    This article present a comparison of soluble sugar levels in seeds of Lupinus atlanticus, Lupinus cosentinii, Lupinus palaestinus and Lupinus pilosus, Lupinus hispanicus subsp. hispanicus and Lupinus luteus of Juno variety. Considering that sugars are accumulated in embryos, only the embryonic tissues were used for biochemical analyses. Additionally, the share of testa and embryo in seed tissues was evaluated. The seed-coat thickness was measured using scanning electron microscopy. The seed coat had the largest share in seeds of Lupinus pilosus and Lupinus palaestinus, and the least share in seeds of Lupinus hispanicus subsp. hispanicus and Lupinus luteus of Juno variety. In the seed of Lupinus pilosus the thickness of the seed coat was 1100 µm, while in Lupinus luteus it was 300 µm. The analysed Lupinus seeds accumulated from 73 mg/g d.m. (dry matter of seed embryo) to 155 mg of soluble sugars/g d.m. The highest quantity of oligosaccharides of the raffinose series was found in seeds of Lupinus luteus, while the lowest amount in seed of Lupinus palaestinus. Galactosyl cyclitols appeared in largest amount in seeds of Lupinus palaestinus and Lupinus pilosus, appropriately 41.93 and 33.75 mg/g dm. The lowest amount of galactosyl cyclitols appeared in Lupinus atlanticus, Lupinus cosentinii and Lupinus hispanicus.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exogenously applied D-pinitol and D-chiro-inositol modifies the accumulation of alpha-D-galactosides in developing tiny vetch [Vicia hirsuta [L.] S.F.Gray] seeds
    Autorzy:
    Lahuta, L B
    Horbowicz, M.
    Gojlo, E.
    Goszczynska, J.
    Gorecki, R.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/56915.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    stachyose
    plant physiology
    D-chiro-inositol
    D-pinitol
    alpha-D-galactoside
    raffinose
    Vicia hirsuta
    galactinol synthase
    tiny vetch
    verbascose
    seed
    Opis:
    In the present study we have investigated the effect of exogenous cyclitols on the accumulation of their galactosides and raffinose family oligosaccharides (RFOs), as well as on some enzymes important for their biosynthesis in seeds of tiny vetch (Vicia hirsuta [L.] S.F. Gray). Immature seeds during 6-day incubation with D-chiro-inositol (naturally does not appear in seeds of tiny vetch) were accumulated cyclitol and its galactosides (fagopyritols: B1 and B2). Short 4-hour incubation with D-chiro-inositol, and subsequent slow desiccation process caused accumulation of free cyclitol only, without biosynthesis of its galactosides. Feeding D-chiro-inositol to pods of tiny vetch induced accumulation of high levels of its galactosides (fagopyritol B1, B2 and B3) in maturing seeds. Similarly, feeding D-pinitol increased accumulation of its mono-, di- and tri-galactosides: GPA, GPB, DGPA and TGPA in tiny vetch seed. Accumulation of both cyclitols and their galactosides drastically reduced accumulation of verbascose. Inhibition of RFOs biosynthesis by elevated levels of free cyclitols suggests some competition between formation of both types of galactosides and similarity of both biosynthetic routes in tiny vetch seeds. Galactinol synthase (GolS) from tiny vetch seeds demonstrated ability to utilize D-chiro-inositol as galactosyl acceptor, instead of myo-inositol. Presence of both cyclitols, as substrates for GolS, caused synthesis of their galactosides: fagopyritol B1 and galactinol. However, formation of galactinol was more efficient than fagopyritol B1. D-chiro-Inositol and D-pinitol at concentrations several-fold higher than myo-inositol had inhibitory effect on GolS. Thus, we suggest that a level of free cyclitols can have an influence on the rate of galactinol biosynthesis and further accumulation of RFOs and galactosyl cyclitols in tiny vetch seeds.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Different effects of soil drought on soluble carbohydrates of developing Lupinus pilosus and Lupinus luteus embryos
    Autorzy:
    Piotrowicz-Cieslak, A I
    Michalczyk, D.J.
    Adomas, B.
    Gorecki, R.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/57870.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant physiology
    carbohydrate
    cyclitol
    raffinose family oligosaccharide
    soil drought
    soil humidity
    seed
    Lupinus luteus
    Juno cultivar
    Lupinus pilosus
    drought
    lupin
    embryo
    galactosyl cyclitol
    Opis:
    The aim of this study was to compare the accumulation of soluble carbohydrates in embryos of two lupin species: cultivated Lupinus luteus (cv. Juno) and wild L. pilosus, developing on plants grown under normal soil humidity and soil drought. All analysed seeds accumulated soluble carbohydrates, including: monosaccharides, sucrose, cyclitols, galactosyl cyclitols and raffinose family oligosaccharides. Soil drought caused a nearly two-fold increase of soluble carbohydrate contents in both species. L. pilosus embryos however, responded to water deficiency by increasing the accumulation of cyclitols and galactosyl cyclitols, whereas L. luteus embryos enhanced accumulation of cyclitols and raffinose family oligosaccharides.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acclimation of poplar trees to heavy metals in polluted habitats: I. Carbohydrate metabolism in fine roots of Populus deltoides
    Autorzy:
    Lorenc-Plucinska, G
    Stobrawa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58719.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    glucose
    fructokinase
    fructose
    glycolysis
    glyceraldehyde 3-phosphate dehydrogenase
    non-structural carbohydrate
    carbohydrate
    hexokinase
    galactose
    soluble carbohydrate
    polluted habitat
    root
    poplar tree
    stachyose
    sucrose
    starch
    Populus deltoides
    concentration
    sugar
    raffinose
    glucose 6-phosphate dehydrogenase
    heavy metal
    Opis:
    Concentrations of total nonstructural carbohydrates (TNC), soluble carbohydrates, starch, sucrose, glucose, fructose, raffinose, galactose, stachyose, mannitol and specific activities of soluble acid (AI) and neutral (NI) invertases, sucrose synthase (SuSy), hexokinase (HK), fructokinase (FK), glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and glucose 6-phosphate dehydrogenase (G6PDH) were analyzed in fine roots of Populus deltoides Bartr. ex Marsh growing at a polluted site (near copper smelters) and a control site (free from heavy pollution). Also chemical properties of the soil from both sites were assessed. In comparison with the control, fine roots from the polluted site contained greater concentrations of TNC, soluble sugars, starch and sucrose but less hexoses, so they had higher values of sucrolysis index (sucrose/hexoses). The activity of AI, NI and SuSy declined insignificantly, while specific activities of HK, FK, GAPDH and G6PDH were significantly inhibited. The results suggest that a long-term heavy metal stress leads to an accumulation of carbohydrates and altering activities of glycolysis and the oxidative pentose phosphate pathway in fine roots.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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