Abstract
The intensity of water uptake by halves of splitroot cuttings fromColeus blumei Benth was measured by potometrical method. Inhibition of the water uptake induced by application of high concentrations of sodium salts of α-naftylacetic acid (NAA) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) in the treated half of the root induced an increase of water uptake by the other half. The compensation is not complete. If only one half of the root treated by synthetic auxin was allowed to take up water, MCPA appeared to induce a smaller degree of reversibility than NAA.
Abstract
Potometricky sa zist’ovala intenzita príjmu vody polovicami deleného koreňa odrezkovColeus blumei Benth. Zistilo sa, že inhibícia príjmu vody vysokými koncentráciami (10−2 M až 10−4 M) sódnej soli kyseliny α-naftyloctovej (NAA) a kyseliny 2-metyl-4-chlórfenoxyoctovej (MCPA) v jednej polovici koreňa vyvoláva zvýšený príjem vody druhou polovicou koreňa. Kompenzácia nie je úplná. Ked sa ponechal príjem vody iba na polovicu koreňa so syntetickým auxínom, prejavil sa rozdiel v stupni reverzibility inhibície príjmu vody sol’ami NAA a MCPA v neprospech MCPA.
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Kozinka, V. Inhibition of water uptake by high concentrations of auxin-like substances. Biol Plant 12, 180–190 (1970). https://doi.org/10.1007/BF02920866
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DOI: https://doi.org/10.1007/BF02920866