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vol. 7, nr. 4 (2006)
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Surface properties of roots of selected mono and dicotyledonous plants, determined with water vapour and nitrogen adsorption-desorption methods
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Alicja Szatanik-Kloc
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Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 7 (2006), nr. 4,
pp. 1015-1026
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abstract:
Two monocotyledonous plants (wheat cv. Lanca and barley cv. Ars) and two dico-tyledonous plants (rape cv. Star and white mustard) were studied. The plants were grown in a nutrient solution prepared according to Marshner and Romheld (1983), at pH = 7 and at 23 ± 10C at 16 h/8 h day/night regime induced whit sodium lamps. The surface area and adsorption energy of the plant roots were determined from water vapour and nitrogen adsorption data. From experimental adsorption isotherms, the surface areas and energetic character of the root samples were calculated using the Aranowicz adsorption theory. Surface areas and average adsorption energy determined for nitrogen were smaller than those estimated by the use of water vapour. The nitrogen as adsorbate better differentiated the surface areas of mono and dicotyledonous plants (larger values for dicotyledonous plants).
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keywords:
roots mono and dicotyledonous plants, specific surface area, adsorption energy water vapour and nitrogen
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original in:
Polish
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