Abstract
Effects of various concentrations of streptomycin sulphate either alone or in combination with different cations and hormones on mungbean (Phaseolus aureus L.) seedling growth were studied. The relative inhibition of root growth was stronger than that of hypocotyl growth. Root growth inhibition was completely overcome by calcium, while other cations were ineffective. Inhibition of hypocotyl elongation could not be prevented by cations. IAA and GA3 were capable of relieving streptomycin inhibition but kinetin was ineffective.
In the coleoptiles of streptomycin-treated rice (Oryza sativa L.) seedlings, there were accumulation of nucleic acids and decline in protein content resulting in increased RNA/protein and DNA/protein ratios. High nucleic acid content induced by streptomycin could be correlated with reduced activity of the nucleases.
Abstract
Byl studován účinek různých koncentrací síranu streptomycinu bud samotného, nebo v přítomnosti některých kationtů a hormonů, na růst klíčních rostlin fazolu zlatého (Phaseolus aureus L.). Relativní inhibice růstu kořenů byla vyšší než inhibice růstu hypokotylu. Tato inhibice byla zcela překonána vápníkem, kdežto ostatní kationty byly neúčinné. K inhibici dlouživého růstu hypokotylu docházelo i v přítomnosti kationtů. IAA a GA3 snižovaly inhibiční účinek streptomycinu, ale kinetin byl neúčinný.
V koleoptilích klíčních rostlin rýže (Oryza sativa L.) ošetřených streptomycinem docházelo k hromadění nukleových kyselin a k poklesu obsahu bílkovin, což vyvolalo zvýšení poměru RNA/bílkoviny a DNA/bílkoviny. Vysoký obsah nukleových kyselin vyvolaný streptomycinem by mohl souviset se snížením aktivity nukleáz.
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Mukherji, S., Bag, A. & Paul, A.K. Streptomycin induced changes in growth and metabolism of etiolated seedlings. Biol Plant 17, 60–66 (1975). https://doi.org/10.1007/BF02921076
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DOI: https://doi.org/10.1007/BF02921076