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(2004)
Distribu - tion and Toxic Effects of Cadmium and Lead on Maize Radicles
A.G. Taylor, M.M. Beresniewicz, M.C. Goffinet (1997)
Basic and Applied Aspects of Seed Biology
I. Seregin, V. Ivanov (1997)
Histochemical investigation of cadmium and lead distribution in plantsRussian Journal of Plant Physiology, 44
N. Obroucheva, E. Bystrova, V. Ivanov, O. Antipova, I. Seregin (1998)
Root growth responses to lead in young maize seedlingsPlant and Soil, 200
M.N. Al-Yemeni (2001)
Effect of Cadmium, Mercury and Lead on Seed Germination and Early Seedling Growth of Vigna ambabensis L.Ind. J. Plant Physiol., 6
N.V. Obroucheva, E.I. Bystrova, V.B. Ivanov, O.V. Antipova, I.V. Seregin (1998)
Radicle Growth Responses to Lead in Young Maize SeedlingsPlant Soil, 200
I. Seregin, L. Shpigun, V. Ivanov (2004)
Distribution and Toxic Effects of Cadmium and Lead on Maize RootsRussian Journal of Plant Physiology, 51
M. Wierzbicka, J. Obidzińska (1998)
The effect of lead on seed imbibition and germination in different plant speciesPlant Science, 137
I. Seregin, A. Kozhevnikova, E. Kazyumina, V. Ivanov (2003)
Nickel Toxicity and Distribution in Maize RootsRussian Journal of Plant Physiology, 50
M. Wierzbicka (1987)
Lead accumulation and its translocation barriers in roots of Allium cepa L.-autoradiographic and ultrastructural studies.Plant, cell & environment, 10 1
Yu.P. Mel’nichuk (1990)
Vliyanie ionov kadmiya na kletochnoe delenie i rost rastenii
I.V. Seregin, V.M. Pekhov, V.B. Ivanov (2002)
Plasmolysis as a Tool to Reveal Lead Localization in the Apoplast of Radicle CellsFiziol. Rast., 49
I.V. Seregin, V.B. Ivanov (1997)
Histochemical Investigation of Cadmium and Lead Distribution in PlantsFiziol. Rast., 44
I.V. Seregin, A.D. Kozhevnikova (2004)
Strontium Transport, Distribution, and Toxic Effects on Maize Seedling GrowthFiziol. Rast., 51
G. Tung, P. Temple (1996)
Uptake and localization of lead in corn (Zea mays L.) seedlings, a study by histochemical and electron microscopy.The Science of the total environment, 188 2-3
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An Ultrastructural Examination of Lead Localization in Germinating Seeds of Raphanus sativus, Z. Pflanzenphysiol
I. Seregin, V. Ivanov (2001)
Physiological Aspects of Cadmium and Lead Toxic Effects on Higher PlantsRussian Journal of Plant Physiology, 48
(2000)
Subcellular Localization and Speciation of Nickel in Hyperaccumulator and NonAccumulator Thlaspi Species
Ute Krämer, I. Pickering, R. Prince, I. Raskin, D. Salt (2000)
Subcellular localization and speciation of nickel in hyperaccumulator and non-accumulator Thlaspi species.Plant physiology, 122 4
S. Lane, E. Martin (1982)
An Ultrastructural Examination of Lead Localisation in Germinating Seeds of Raphanus sativusZeitschrift für Pflanzenphysiologie, 107
I.V. Seregin, V.B. Ivanov (2001)
Physiological Aspects of Cadmium and Lead Toxic Effects on Higher PlantsFiziol. Rast., 48
N. Obroucheva, V. Ivanov, M. Sobotik, H. Bergmann, O. Antipova, E. Bystrova, I. Seregin, L. Shpigun (2001)
Lead effects on cereal roots in terms of cell growth, root architecture and metal accumulation
(1998)
Barrier Role of Radicle System in LeadExposed Plants
I.V. Seregin, A.D. Kozhevnikova, E.M. Kazyumina, V.B. Ivanov (2003)
Nickel Toxicity and Distribution in Maize RadiclesFiziol. Rast., 50
I. Seregin, A. Kozhevnikova (2004)
Strontium Transport, Distribution, and Toxic Effects on Maize Seedling GrowthRussian Journal of Plant Physiology, 51
I. Seregin, V. Pekhov, V. Ivanov (2002)
Plasmolysis as a Tool to Reveal Lead Localization in the Apoplast of Root CellsRussian Journal of Plant Physiology, 49
N.V. Obroucheva, V.B. Ivanov, M. Sobotik, H. Bergmann, O.V. Antipova, E.I. Bystrova, I.V. Seregin, L.K. Shpigun (2001)
Recent Advances of Plant Radicle Structure and Function
S. Lane, E. Martin (1977)
A HISTOCHEMICAL INVESTIGATION OF LEAD UPTAKE IN RAPHANUS SATIVUSNew Phytologist, 79
A. Taylor, M. Beresniewicz, M. Goffinet (1997)
Semipermeable Layer in Seeds
Seed germination is tolerant to heavy metals apparently because the seed coat is impermeable to metal ions. However, it is not clear whether the seed coat is a universal barrier for all metals. In addition, depending on their physical and chemical properties, a distribution of various metals may differ within an imbibing caryopsis, and therefore they produce dissimilar effects on seed germination. The toxic effects of Cd(NO3)2, Pb(NO3)2, Ni(NO3)2, and Sr(NO3)2 were estimated from the germination rates of maize (Zea mays L.) caryopses following two-day incubation with these salts. The distribution of heavy metals and Sr was studied by histochemical methods based on the formation of colored complexes with dithizone (Cd and Pb), dimethylglyoxyme (Ni), and sodium rhodizonate (Sr). Although the metals under study did not affect maize radicle protrusion, they inhibited seed germination in the following order: Cd > Ni ≈ Pb > Sr. Cd and Pb accumulated mainly in the seed coat cells, but Sr and Ni in the embryo cells and in the cells of endosperm (Sr) and scutellum (Ni). Although Cd was found only in the seed coat, it was the strongest inhibitor of seed germination. Apparently, due to high toxicity, Cd exerted its inhibitory effect at the concentrations too low for histochemical assay. In spite of easy translocation across the seed coat of imbibing caryopses, Sr did not considerably inhibit radicle protrusion and seed germination, apparently because of its low toxicity and predominant localization in the apoplast of embryo and endosperm cells.
Russian Journal of Plant Physiology – Springer Journals
Published: Aug 9, 2005
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