Uptake of potassium and its influence on growth and magnesium uptake by groundnut (Arachis hypogaea L.) plants
- 1 May 1974
- journal article
- Published by Institute of Experimental Botany in Biologia plantarum
- Vol. 16 (3) , 210-214
- https://doi.org/10.1007/bf02920917
Abstract
Groundnut (Arachis hypogaea L.) plants were grown for 55 days in dilute nutrient solution at varying concentration of potassium. Data are recorded for the rate of uptake of potassium, magnesium and growth response. Over the concentration range studied, the rate of absorption of potassium followed Michaelis-Menten kinetics with a Michaelis constant (Km) of 0.06×10−3M. Identical response curves were observed for either total growth or total uptake. Maximum yield was obtained at a concentration of about 200 μM potassium. Increasing concentrations of potassium depressed the uptake of magnesium. Podzemnice olejná (Arachis hypogaea L.) byla pěstována 55 dní v zředěném živném roztoku s různou koncentrací draslíku. Byla zjišfována rychlost příjmu draslíku a hořěíku a odpovídající rychlost růstu. V rozsahu studovaných koncentrací rychlost absorbce sledovala kinetické rovnice Michaelis-Mentenové, konstanta Km se rovnala 0.06×10−3M. Odpovídající křivky byly zjištěny jak pro růst, tak i pro celkový příjem. Maximální výnos byl při koncentraci draslíku asi 2×10−4M. Při zvýšené koncentraci draslíku byl snížen příjem hořčíku.Keywords
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