Abstract
The study was concerned with the effects of irradiation of the sodium humate on its biological activity, which was assessed by the elongation of the hypocotyl and root in young plants of lettuce (Lactuca sativa L. cv. Rapid and cv. Smaragd) growing in the solution of the tested preparation. It was found that its stimulative action on hypocotyl and root elongation in lettuce was changed due to irradiation. However, the degree was dependent on concentration; stimulation mostly decreased, only at some higher concentrations did it increase. Further, experiments showed that there was some interaction between the irradiation of the humate and the cultivar used for testing, but none between the irradiation and the light exposure of plants during the test. The response of the experimental plants to the concentration of the humate depends on the light exposure.
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References
Alibv, S. A.: [Paramagnetic properties and physiological activity of soil humic acids.] In Russ. - In: Studies about Humus. (Symp. Humus et Planta). Vol.VII. Pp. 373–378. Brno 1979.
Martinec, T.: [The effect of light on the regulability of pH of drying soils.] In Czech. - Publ. Fac. Sci. Univ. Masaryk (Brno) No.279: 1–25, 1946.
Prát, S.: [Effect of humus substances (Kapucins) on algae.] In Czech. - Čs. Biol.4: 535 to 541, 1955.
Tichý, V.: Biological activity of ultraviolet irradiated humic acids. - In: Studies about Humus. (Symp. Humus et Planta). Vol.V. Pp. 553–556. Praha 1971.
Weber, E.: Grundriss der biologischen Statistik. - VEB Gustav Fischer Verlag, Jena 1972
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Tichý, V. Changes in biological activity of sodium humate as induced by the mercury discharge tube radiation. Biol Plant 23, 1–8 (1981). https://doi.org/10.1007/BF02909203
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DOI: https://doi.org/10.1007/BF02909203