Acidification and salinity of the substrate as stress factors for plants
1990
Bilski, J.
The relationship between the immunity of plants and changes in their chemical composition is presented against the background of different intensity of acidification and salinity. It has been found that, apart from aluminium and manganese, also an excess of hydrogen ions can considerably restrain the growth of plants. Aluminium exerted stronger toxic effect on plant than analogic doses of manganese. Acidification of the substrate intensified the aluminium and manganese uptake by plants and led to a drop of the Ca, Mg and P content in tissues. Humic acid and calcium reduced the aluminium effect on plants. The works on reaction of plants to salinity have proved that the reaction of species and varieties of plants can depend on the kind of salts occurring in excess in the salinated substrate. An addition of calcium to substrate salinated with sodium chloride led to a better growth of seedlings and restrained the sodium and chloride uptake by them. Similar though weaker effect exerted under these conditions nitrogen, zinc and potassium
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