THE EFFECT OF LIGNОACIDS, A BYPRODUCT OF OXIDATIVE PROCESSING OF PINE AND ASPEN WOOD INTO VANILLIN AND CELLULOSE, ON THE OF RADISH (RAPHANUS SATIVUS VAR. RADICULA) SEEDS GERMINATION
UDC 631.811+635.152+544.47
Abstract
The growth-promoting activity of lignoacids (LA), byproducts of the catalytic oxidation of pine and aspen wood to vanillin and cellulose, was studied. The use of LA opens the possibility of recycling wastewater from the catalytic processing of wood. The growth-promoting activity of LA was assessed on radish seeds Raphanus sativus var. radicula under laboratory conditions during germination on filter paper; germination energy, germination rate, and root and hypocotyl lengths were determined. The growth-promoting activity of LA was compared to radish seed germination in water and potassium bicarbonate solutions. It was shown that LA isolated during pine wood oxidation at concentrations of 5–40 mg/L exhibited a more pronounced growth-promoting effect compared to lignoacids isolated from aspen wood oxidation reaction solutions. It has been established that the growth-promoting effect increases in the order LCOsins < Pine LKS < Flax shives. This corresponds to a decrease in the content of methoxyl groups in various lignins. Lignoacids released during the oxidation of lignins from herbaceous plants and agricultural waste appear more promising for use as growth stimulants.
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