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vol. 6, nr. 2 (2005)
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Effect of aluminium stress on geometric and energetic character of roots derived from nitrogen adsorption
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Alicja Szatanik-Kloc, Grzegorz Bowanko
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Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 6 (2005), nr. 2,
pp. 561-568
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abstract:
Spring barley (Ars) and two wheat varieties (Henika – sensitive and Inia – resistant) of various tolerance to aluminum stress, were studied. The plants were stressed with different Al concentrations at two growth stages – shooting and tillering. The plants were grown in nutrient solution at pH = 7 and pH = 4 (noAl) and pH = 4 + 20 mg dm3 aluminium (AlCl3). Nitrogen adsorption isotherms were measured for the roots of the plants. From the isotherms, surface areas and surface energetic parameters were calculated using Brunauer, Emmett and Teller (BET) theory. Under Al stress the root surface area increased and the average adsorption energy decreased. The most intensive changes were noted for spring barley in tillering stage. Similar tendencies were derived previously from water vapour adsorption method.
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keywords:
roots materials, aluminium, nitrogen adsorption isotherms, pH, surface area, adsorption energy
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original in:
Polish
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