The effect that nickel,copper, and zinc salts have on seed germination and initial ontogenesis of water parsnip (<Emphasis Type="Italic">Sium latifolium</Emphasis> L.) and wood club-rush (<Emphasis Type="Italic">Scirpus silvaticus</Emphasis> L.) |
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Authors: | E G Krylova |
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Institution: | 1.Papanin Institute for Biology of Inland Waters,Russian Academy of Sciences,Borok, Nekouzskii raion, Yaroslavl oblast,Russia |
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Abstract: | The effect that nickel, copper, and zinc sulfates have on seed germination and the initial stages of the ontogenesis of water
parsnip and wood club-rush has been investigated. Nickel and copper in the concentration range of 250–500 mg/l and zinc at
a concentration of 500 mg/l were the most toxic for water parsnip seeds, while, for the wood club-rush seeds, maximum toxicity
was observed at Ni and Cu concentrations ranging from 50 to 500 mg/l and at Zn concentrations of 250–500 mg/l. The development
of water parsnip seedlings was normal at Ni concentrations of 1–25 mg/l, Cu concentrations of 1–10 mg/l, and Zn concentrations
up to 50 mg/l; the development of wood club-rush seedlings was normal at a Ni concentration of 1 mg/l, and Cu and Zn concentrations
of 1–25 mg/l. A further increase in the concentration caused photosynthesis suppression, slower growth of the vegetation organs,
and their subsequent necrosis. Water parsnip is more resistant to the toxicants. |
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