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Tytuł:
About the biophysical mechanisms of the long-distance water translocation in plants
Autorzy:
Kargol, M.
Kosztolowicz, T.
Przestalski, S.
Powiązania:
https://bibliotekanauki.pl/articles/24085.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
translocation
transport mechanism
leaf tissue
assimilation
water
mineral component
root
plant
Źródło:
International Agrophysics; 1995, 09, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decrease in pig fertility as a result of reciprocal translocations and associated economic effects on the basis of rcp [7;13][q13;q46]
Autorzy:
Danielak-Czech, B
Kozubska-Sobocinska, A
Slota, E
Rejduch, B
Okularczyk, S
Powiązania:
https://bibliotekanauki.pl/articles/2047231.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pig
fertility
simulation account
reciprocal translocation
litter size
karyotype
Opis:
Reciprocal translocations, very frequently identified in pigs, are the cause of fertitlity decrease. The aim of this work was to provide an objective assessment of the real effect of reciprocal translocation (7;13) on the fertility of carriers and associated economic effects. The experiment has shown that fertility, expressed as a mean litter size, decreased by 48% in comparison to that of the control group. On the basis of simulation account, financial losses incurred a translocation - as a result of using carrying boar in a commercial herd were estimated at about 8,000 USD for natural mating and at about 162,000 USD for artificial insemination. The results obtained show the need for introducing a system for cytogenetic control of boars producing small litters into the Polish swine improvement programme.
Źródło:
Journal of Applied Genetics; 1996, 37, 4; 373-384
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transfer of chromosomes of the A and B genomes of wheat to tetraploid rye
Autorzy:
Apolinarska, B
Powiązania:
https://bibliotekanauki.pl/articles/2047251.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosome transfer
translocation
rye
substitution
addition
tetraploid triticale
wheat
crossing
hybrid
B genome
A genome
tetraploid rye
Opis:
Tetraploid rye was crossed with different tetraploid triticale lines. The F₁ generation of tetraploid rye × tetraploid triticale hybrids was backcrossed with 4x rye. After backcrossing, all BC₁-F₁ plants were subjected to open pollination, whereas in the BC₁-F₂ generations only plants with wheat chromosomes in their karyotypes were open-pollinated. Substitution, addition and addition-substitution lines of wheat chromosomes in tetraploid rye were isolated from the F₂ and F₃ of BC₁. In 60 plants of BC₁-F₂, 59 chromosomes from the A genome and 9 from the B genome of wheat were recovered. The wheat chromosomes were monosomic except for five plants which were disomic, viz. 1A and 5A in two plants each, and a translocated 3AS/5AL in one plant. In 235 BC₁-F₃ plants, 174 wheat addition and substitution chromosomes were found, 143 from the A genome and 31 from the B genome. All wheat chromosomes except 3A from the A genome and four chromosomes from the B genome - 2B, 3B, 5B and 7B were recovered. The number of substitutions ranged from one to four per plant, only two plants having four. In the group of addition plants the number of added wheat chromosomes ranged from one to two, and in the case of addition-substitution plants — from two to four. Wheat chromosomes occurred in monosomic form, except 10 plants. Six substitution plants were disomic for 1 A, 2A, 5A, 7A, 2B and 3B, respectively. One was disomic for 1A and 5A in two addition plants. Two addition-substitution plants were double disomic: 1A and 5A - in one, and 1A and 3B in the other. In the BC₁-F₃ generation, 23 different translocations were found, four of which occurred between wheat chromosomes and the remaining 19 - between wheat and rye chromosomes. Translocated chromosomes were monosomic, except four plants. Two of them were disomic for 3AS/4RL, one for 4AS/4RS and one for 7AS/7RS. The fertility of both addition and substitution plants ranged from 0 to 38.0 seeds/spike, regardless of the chromosome number, with a mean of 9.61 seeds/spike. Plants with 28 chromosomes showed singnificantly higher fertility than plants with 29 and more chromosomes, except additoion plants with chromosomes 5A and 5B. The analysis of the influence of particular wheat chromosomes on plant fertility showed that both substitution and addition plants with chromosome 6A had the highest average fertility, while plants with chromosome 2B in substitution lines as well as plants with chromosome 2A in addition and addition-substitution lines had the lowest fertility.
Źródło:
Journal of Applied Genetics; 1996, 37, 4; 345-356
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chromosome abnormalities in domestic sheep [Ovis aries]
Autorzy:
Long, S E
Powiązania:
https://bibliotekanauki.pl/articles/2046598.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ovis aries
translocation
chromosome abnormality
domestic sheep
sheep
karyotype
infertility
Opis:
The clinical effects of twenty different chromosome anomalies in sheep are reviewed. It is concluded that not all anomalies give rise to reproductive problems or phenotypic variations. In particular, the centric fusion translocations appear not to have affected fertility and they have been helpful in determining the karyotype of the sheep.
Źródło:
Journal of Applied Genetics; 1997, 38, 1; 65-76
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanism, detection and significance of some chromosomal rearrangements in chronic myeloid leukaemia [CML] and acute lymphoblastic leukaemia [ALL]
Autorzy:
Ladon, D
Witt, M.
Powiązania:
https://bibliotekanauki.pl/articles/2043432.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
translocation
minimal residual disease
in situ
hybridization
fluorescence
chronic myeloid leukemia
chromosome aberration
mixed chimerism
detection
cytogenetic evolution
acute lymphoblastic leukemia
Źródło:
Journal of Applied Genetics; 2000, 41, 3; 187-197
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A familial X-Y translocation: cytogenetic and molecular study
Autorzy:
Kusz, K
Wojda, A.
Wisniewska, M.
Latos-Bielenska, A.
Jaruzelska, J.
Powiązania:
https://bibliotekanauki.pl/articles/2041975.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosome
human genetics
hirsutism
molecular analysis
X-Y translocation
Źródło:
Journal of Applied Genetics; 2001, 42, 2; 237-240
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of 1bl/1rs translocation in interspecific hybrids between Aegilops and Triticum.
Autorzy:
Tyrka, Mirosław
Stefanowska, Grażyna
Tarkowski, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/2198846.pdf
Data publikacji:
2002-12-22
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
1BL/1RS translocation
Aegilops spp.
STS-PCR
Triticum durum
Triticum aestivum
Opis:
The aim of studies was testing for presence of 1BL/1RS translocation in 17 lines derived from wide crosses of Aegilops ventricosa and Aegilops juvenalis with common and durum wheats, along with parental forms. PCR analyses detected translocated chromosome in Lanca and CZR1406 wheats and in 4 hybrid lines (JCPC, JCCP, JCC and JCCC). The lack of 1RS arm in lines (VGL and VGLL) derived from crosses with Lanca suggests that another chromosomal rearrangements occurred. We confirmed the usefulness of applied STS-PCR assays for fast and robust identification of 1BL/1RS translocation in breeding materials.
Źródło:
Plant Breeding and Seed Science; 2002, 46, 2; 37-43
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steroid signal transduction activated at the cell membrane: from plants to animals.
Autorzy:
Marcinkowska, Ewa
Więdłocha, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1043743.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
signal transduction pathways
membrane receptors
nuclear receptors
transcription factors
translocation
steroid hormones
Opis:
Steroid hormones in plants and in animals are very important for physiological and developmental regulation. In animals steroid hormones are recognized by nuclear receptors, which transcriptionally regulate specific target genes following binding of the ligand. In addition, numerous rapid effects generated by steroids appear to be mediated by a mechanism not depending on the activation of nuclear receptors. Although the existence of separate membrane receptors was postulated many years ago and hundreds of reports supporting this hypothesis have been published, no animal membrane steroid receptor has been cloned to date. Meanwhile, a plant steroid receptor from Arabidopsis thaliana has been identified and cloned. It is a transmembrane protein which specifically recognizes plant steroids (brassinosteroids) at the cell surface and has a serine/threonine protein kinase activity. It seems that plants have no intracellular steroid receptors, since there are no genes homologous to the family of animal nuclear steroid receptors in the genome of A. thaliana. Since the reason of the rapid responses to steroid hormones in animal cells still remains obscure we show in this article two possible explanations of this phenomenon. Using 1,25-dihydroxyvitamin D3 as an example of animal steroid hormone, we review results of our and of other groups concordant with the hypothesis of membrane steroid receptors. We also review the results of experiments performed with ovarian hormones, that led their authors to the hypothesis explaining rapid steroid actions without distinct membrane steroid receptors. Finally, examples of polypeptide growth factor that similarly to steroids exhibit a dual mode of action, activating not only cell surface receptors, but also intracellular targets, are discussed.
Źródło:
Acta Biochimica Polonica; 2002, 49, 3; 735-745
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tetraploid triticale as a potential source of new variation for rye
Autorzy:
Łapiński, Bogusław
Rafalski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2198908.pdf
Data publikacji:
2004-06-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
chromosome translocation
introgression
rye
tetraploid triticale
Opis:
High crossability of tetraploid triticale (X Triticosecale Wittmack) with rye (Secale cereale L.) and relatively high fertility of the resulting hybrids make the triticale an attractive bridge species for introduction of wheat genes into rye breeding populations. It was found, with the use of in situ hybridization technique, that some 4x triticale materials bred in Radzików contain small wheat translocations, of both distal and intercalary type, into the rye 5R chromosome. The distal wheat translocation occupying less than 5% of the long arm was transferred into diploid rye, but a disomic line has not been established yet. Other wheat translocations of the chromosomes 1R and 5R were found in hybrids of 4x rye with 4x triticale. Besides the intergenomic crossing-over, at least one another mechanism of DNA rearrangements operated. Small intercalary two-dot signals of the wheat fluorescent probe were also found in one line on a rye chromosome different than 5R. Most puzzling was the „invisible” migration of wheat DNA to rye chromosomes, detectable on southern dot-blots, but not on the in situ slides. The wheat probe dot-blot signals were recorded for more than 1/3 of rye plants from the first back-cross of the 4x triticale × 2x rye hybrids to rye.
Źródło:
Plant Breeding and Seed Science; 2003, 48; 25-35
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure, function, and regulation of myosin 1C.
Autorzy:
Barylko, Barbara
Jung, Gwanghyun
Albanesi, Joseph
Powiązania:
https://bibliotekanauki.pl/articles/1041416.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
myosin 1
membrane protein translocation
domain structure
Opis:
Myosin 1C, the first mammalian single-headed myosin to be purified, cloned, and sequenced, has been implicated in the translocation of plasma membrane channels and transporters. Like other forms of myosin I (of which eight exist in humans) myosin 1C consists of motor, neck, and tail domains. The neck domain binds calmodulins more tightly in the absence than in the presence of Ca^(2+). Release of calmodulins exposes binding sites for anionic lipids, particularly phosphoinositides. The tail domain, which has an isoelectic point of 10.5, interacts with anionic lipid headgroups. When both neck and tail lipid binding sites are engaged, the myosin associates essentially irreversibly with membranes. Despite this tight membrane binding, it is widely believed that myosin 1C docking proteins are necessary for targeting the enzyme to specific subcellular location. The search for these putative myosin 1C receptors is an active area of research.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 373-380
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of progressive acidification of lessive soil on zinc content and its translocation in soil profile
Wplyw systematycznego zakwaszania gleby plowej na zawartosc cynku w roslinach oraz jego przemieszczanie w profilu glebowym
Autorzy:
Kiepul, J
Gediga, K.
Powiązania:
https://bibliotekanauki.pl/articles/14629.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
soil
lessive soil
acidification
soil acidification
zinc content
translocation
soil profile
soil reaction
lysimeter
Opis:
In Poland 11% of soils feature elevated zinc content or slight zinc contamination. This investigation aimed at estimation of the effect of progressive acidification of slightly zinccontaminated soils on zinc content in plants and translocation of this metal downwards the soil profile. The study involved a two-year lysimetric experiment on lessive soil. The amount of zinc indicating slight soil contamination was introduced into 0.2 m of topsoil, which was subjected to progressive acidification with sulfuric acid solution in the course of the experiment. Zinc content proved to considerably increase in plants (barley straw and maize) only under strong acidification. Soil reaction did not significantly influence the zinc content in soil, both total and assayed in HCl zinc forms, while a considerable increase in easily soluble zinc forms (in CaCl2 solution) occurred on strongly acidified soils. Considering the whole research period, increasing soil acidification did not result in any alterations involving zinc content in Bbr and C horizons of soil profiles (below 30 cm).
W Polsce 11% gleb charakteryzuje się podwyższoną zawartością lub słabym zanieczyszczeniem cynkiem. Celem pracy było określenie wpływu systematycznego zakwaszania gleby słabo zanieczyszczonej cynkiem na zawartość tego pierwiastka w roślinach i jego przemieszczanie w głąb profilu glebowego. Badania prowadzono w trakcie dwuletniego doświadczenia lizymetrycznego na glebie płowej. Do warstwy gleby 0-20 cm dodano cynk w ilości odpowiadającej słabemu zanieczyszczeniu tym pierwiastkiem. W czasie badań glebę systematycznie zakwaszano, stosując roztwór kwasu siarkowego. Stwierdzono, że zawartość cynku w roślinach (jęczmień-słoma i kukurydza) istotnie wzrosła tylko na najbardziej zakwaszanych obiektach. Odczyn gleby nie wpływał istotnie na zawartość całkowitych i oznaczanych w HCl form cynku w glebie. Natomiast zawartość łatwo rozpuszczalnych form cynku (w roztworze CaCl2) istotnie wzrosła w najbardziej zakwaszonych glebach. Rosnące zakwaszenie gleby nie wpłynęło w trakcie badań na zawartość cynku w poziomach Bbr i C profilu glebowego (poniżej 30 cm).
Źródło:
Journal of Elementology; 2009, 14, 2; 265-270
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of bottom sediment on content, bioaccumulation and translocation on heavy metals in maize biomass
Wplyw osadu dennego na zawartosc, bioakumulacje i translokacje metali ciezkich w biomasie kukurydzy
Autorzy:
Jasiewicz, C
Baran, A.
Tarnawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/16168.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
bottom sediment
heavy metal content
bioaccumulation
translocation
heavy metal
maize
biomass
Opis:
The research aimed to assess the effect of bottom sediment on the content, bioaccumulation and translocation of heavy metals in maize biomass. The investigations were conducted in 2006-2007 as a pot experiment on light soil of the granulometric composition of weakly-loamy sand. The experimental design comprised 3 treatments: without sediment (I), a 5% sediment admixture (II) and a 10% sediment admixture to the soil (III). Bottom sediment was added to the soil in the first year of the investigations. The content of Zn, Cu, Ni. Pb, Cd and Cr was determined using the ICP-EAS method in the plant material after its dry mineralization and ash solution in HNO3. The uptake of the above-mentioned metals by maize was computed alongside their bioaccumulation and translocation coefficients. The effect of bottom sediment admixture on heavy metal concentrations in maize was determined to be varied, e.g. a 5% dose of sediment added to soil decreased the content of all the analyzed heavy metals in the biomass of maize aerial parts, whereas a 10% admixture increased the content of Cu, Ni, Pb and Cr. The values of bioaccumulation coefficients revealed that an admixture of both doses of bottom sediment led to a decreased accumulation of Zn, Cu, Cd, Cr and Ni (5% dose) in maize aerial biomass. Moreover, the plant more easily accumulated Zn, Cd and Cu than Cr, Ni or Pb. Permissible amounts of heavy metals in plants to be used as animal fodder were not exceeded in the maize biomass.
Celem badań była ocena wpływu osadu dennego na zawartość, bioakumulację i translokację metali ciężkich w biomasie kukurydzy. Badania prowadzono w latach 2006-2007, w warunkach doświadczenia wazonowego, na glebie lekkiej o składzie granulometrycznym piasku słabogliniastego. Schemat doświadczenia obejmował 3 obiekty: bez osadu (I), z dodatkiem 5% osadu (II) i dodatkiem 10% osadu do gleby (III). Osad denny dodano do gleby w pierwszym roku badań. Zawartość Zn, Cu, Ni, Pb, Cd, Cr w materiale roślinnym oznaczono po suchej mineralizacji i roztworzeniu popiołu w HNO3. Obliczono wynos ww. metali przez kukurydzę oraz ich współczynniki bioakumulacji i translokacji. Stwierdzono niejednoznaczny wpływ dodatku osadu dennego na zawartość metali ciężkich w kukurydzy. Osad dodany w ilości 5% do gleby wpłynął na zmniejszenie zawartości wszystkich analizowanych metali w nadziemnej biomasie kukurydzy, natomiast 10% dodatek osadu na zwiększenie ich zawartości (Cu, Ni, Pb, Cr). Wartości współczynników bioakumulacji świadczą, że dodatek osadu dennego w obu dawkach spowodował zmniejszenie akumulacji Zn, Cu, Cd, Cr oraz Ni (dawka 5%) w biomasie nadziemnej kukurydzy, ponadto rośliny łatwiej akumulowały Zn, Cd i Cu niż Cr, Ni i Pb. W biomasie kukurydzy nie stwierdzono przekroczenia dopuszczalnych zawartości metali ciężkich przyjętych do oceny roślin pod względem ich przydatności paszowej.
Źródło:
Journal of Elementology; 2010, 15, 2; 281-290
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the mode of integration of the thylakoid membrane protein cytochrome b6 into cytoplasmic membrane of Escherichia coli
Autorzy:
Króliczewski, Jaroslaw
Gubernator, Beata
Rögner, Matthias
Szczepaniak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1039882.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
membrane protein
signal sequence
integration/translocation
cytochrome b6
Opis:
In the stroma compartment, several pathways are used for integration/translocation of chloroplast proteins into or across the thylakoid membrane. In this study we investigated the mode of incorporation of the chloroplast-encoded cytochrome b6 into the bacterial membrane. Cytochrome b6 naturally comprises of four transmembrane helices (A,B,C,D) and contains two b-type hemes. In the present study, mature cytochrome b6 or constructed deletion mutants of cytochrome were expressed in E. coli cells. The membrane insertion of cytochrome b6 in this bacterial model system requires an artificially added presequence that directs the protein to use an E. coli membrane-insertion pathway. This could be accomplished by fusion to maltose-binding protein (MBP) or to the bacterial Sec-dependent signal peptide (SSpelB). The integration of mature cytochrome b6 into the bacterial cytoplasmic membrane by the Sec pathway has been reported previously by our group (Kroliczewski et al., 2005, Biochemistry, 44: 7570). The results presented here show that cytochrome b6 devoid of the first helix A can be inserted into the membrane, as can the entire ABCD. On the other hand, the construct devoid of helices A and B is translocated through the membrane into the periplasm without any effective insertion. This suggests the importance of the membrane-anchoring sequences that are likely to be present in only the A and B part, and it is consistent with the results of computational prediction which did not identify any membrane-anchoring sequences for the C or D helices. We also show that the incorporation of hemes into the truncated form of cytochrome b6 is possible, as long as the B and D helices bearing axial ligands to heme are present.
Źródło:
Acta Biochimica Polonica; 2011, 58, 3; 335-343
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytotoxic effects of hexavalent chromium on rapeseed plants
Fitotoksyczność chromu sześciowartościowego dla roślin rzepaku
Autorzy:
Peško, M.
Kráľová, K.
Powiązania:
https://bibliotekanauki.pl/articles/126705.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
bioaccumulation and translocation factors
chlorophyll content
chromium
lipid peroxidation
rapeseed
bioakumulacja i translokacja czynników
zawartość chlorofilu
chrom
peroksydacja lipidów
rzepak
Opis:
Rapeseed (Brassica napus L. subsp. napus) plants were exposed to six different concentrations (12, 24, 60, 120, 240, 480 μmol dm–3) of K2Cr2O7 for 7 days. Dry mass of shoots and roots decreased rapidly with increasing external Cr(VI) concentration. Application of Cr(VI) concentrations ³ 120 μmol dm–3 caused that leaves were strongly chlorotic and some of them even desiccated. Roots of these plants where subtile and brownish. Notable decrease in chlorophyll content was observed already at the lowest (12 μmol dm–3) used concentration. Content of soluble proteins in leaves decreased rapidly within the studied concentration range, whereby the lowest protein content was observed after application of 240 μmol dm–3 Cr(VI). Lipid peroxidation expressed as a content of malondialdehyde in leaves was notable already after application of 12 μmol dm–3 Cr(VI). At lower applied Cr(VI) concentrations (12÷120 μmol dm–3) the bioaccumulation factors related to Cr accumulation in roots were higher then those determined for shoots. Treatment with higher Cr(VI) concentrations (240 and 480 μmol dm–3) had an opposite effect and BAFs for the shoots exceeded those determined for the roots. The portion of Cr allocated in shoots related to the total Cr amount accumulated by plant ranged from 23.3% (12 μmol dm–3) to 94.7% (480 μmol dm–3). In the case of higher applied external Cr(VI) concentrations (120÷480 μmol dm–3) the defence mechanisms of plants were evidently impaired and uncontrolled Cr translocation within the plant occurred.
Źródło:
Proceedings of ECOpole; 2011, 5, 2; 413-418
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Zinc Content and Mobility in Maize
Ocena zawartości i mobilności cynku w kukurydzy
Autorzy:
Baran, A.
Powiązania:
https://bibliotekanauki.pl/articles/387988.pdf
Data publikacji:
2012
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
cynk
kukurydza
indeks koncentracji
współczynnik bioakumulacji i translokacji
maiz
zinc
concentartion index
bioaccumulation and translocation coefficient
Opis:
The research aimed to assess the content and mobility of zinc in maize cultivated in soils polluted with this element. The indicators of the assessment were: zinc content in maize, zinc concentration index, zinc bioaccumulation and translocation index. A two-year pot experiment was conducted parallel on soils: light and heavy one. Four levels of zinc were applied in the experiment: Zn0 – 0 mg (control), Zn1 – 50 mg, Zn2 – 250 mg and Zn3 – 750 mg kg–1 soil d.m. Zinc content in the aerial parts and roots was determined after dry mineralization and dissolving the ashes in HNO3 using atomic emission spectrometry in inductively coupled argon plasma (ICP-AES). Soil contamination with zinc significantly affected an increase in this metal contents in the aboveground and underground maize biomass. The aboveground biomass obtained on the light soil contained 2-fold (Zn1), 5-fold (Zn2) and 25-fold (Zn3) bigger amounts of zinc in comparison with the treatment without zinc supplement. On the other hand, on the heavy soil the dependencies were respectively 2-fold (Zn1), 7-fold (Zn2) and 19-fold (Zn3). Bigger zinc content was assessed in roots than in the aerial parts and the dependence was confirmed by low values of the translocation coefficient (TC). Greater phytoavailability and phytotoxicity of zinc was demonstrated in the light soil than in the heavy soil. The relationship was confirmed by a better zinc solubility determined by 1 mol HCl dm–3 in the light soil but also by higher values of zinc bioaccumulation coefficients in this soil.
Celem badań była ocena zawartości i mobilności cynku w kukurydzy na glebach zanieczyszczonych tym pierwiastkiem. Jako wskaźniki tej oceny zastosowano: zawartość cynku w kukurydzy, indeks koncentracji cynku, współczynnik bioakumulacji i translokacji cynku. Dwuletnie doświadczenie wazonowe przeprowadzono równolegle na dwóch glebach glebie lekkiej i ciężkiej. W doświadczeniu zastosowano cztery poziomy cynku: Zn0 - 0 mg (obiekt kontrolny), Zn1 - 50 mg, Zn2 - 250 mg, Zn3 - 750 mg kg-1 s.m. gleby. Zawartość cynku w częściach nadziemnych i korzeniach oznaczono po suchej mineralizacji i roztworzeniu popiołu w HNO3 (1:3) metodą atomowej spektrometrii emisyjnej ze wzbudzeniem w indukcyjnie sprzężonej plazmie argonowej (ISP-AES). Zanieczyszczenie gleb cynkiem wpłynęło znacznie na zwiększenie zawartości tego metalu w biomasie nadziemnej i podziemnej kukurydzy. Uzyskana biomasa nadziemna na glebie lekkiej zawierała 2 (Zn1), 5 (Zn2) i 25 (Zn3)-krotnie więcej cynku w porównaniu do obiektu bez dodatku cynku. Z kolei na glebie ciężkiej zależności te wyniosły odpowiednio 2 (Zn1), 7 (Zn2) i 19 (Zn3). Większą zawartość cynku stwierdzono w korzeniach niż w częściach nadziemnych. Zależność tą potwierdzają niskie wartości współczynnika translokacji WT. Większą fitodostępność i fitotoksyczność cynku wykazano w warunkach gleby lekkiej niż ciężkiej. Zależność tą potwierdza większa rozpuszczalność cynku oznaczona 1 mol HCl dm-3 w glebie lekkiej, a także wyższe wartości współczynników bioakumulacji cynku w warunkach tej gleby.
Źródło:
Ecological Chemistry and Engineering. A; 2012, 19, 7; 699-706
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 55

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