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Allelopathic effects of the aqueous leaf extract of Quercus mongolica

Chengjun Yang, Weizhe Sun, Liu Yang and Huiyan Gu

The purpose of this study was to explore whether the scarcity of understory vegetation in Quercus mongolica is due to the allelopathy of Quercus mongolica leaves. Quercus mongolica leaves represented the donor plant, Brassica pekinensis and Raphanus sativus were the receptor plants, and the allelopathic influences of the aqueous extract of Quercus mongolica leaves on the growth and physiological responses of Brassica pekinensis and Raphanus sativus were investigated. Allelochemicals such as hydrocarbons, alcohols, esters and organic acids were detected by gas chromatography-mass spectrometry. In this research, we investigated the high-concentration aqueous extract (0.10 g/mL) had significant inhibitory effect on the seeds of receptor plants, that the extract had a significant concentration gradient, and that the extract had a bigger stimulatory influence in Raphanus sativus than on Brassica pekinensis. The malondialdehyde (MDA) content increased with increasing aqueous extract concentrations, except at 0.02 g/mL and 0.04 g/mL. The activity of antioxidant enzymes in recipient plants is greatly inhibited at high aqueous extract concentrations (0.06 g/mL, 0.08 g/mL and 0.10 g/mL) and significantly stimulated at low concentrations (0.02 g/mL and 0.04 g/mL). In summary, the leaves of Quercus mongolica have a certain inhibitory effect on its understory vegetation.  

To Cite this article: Yang, C., W. Sun, L. Yang and H. Gu. 2024. Allelopathic effects of the aqueous leaf extract of Quercus mongolica. Pak. J. Bot., 56(4): DOI:  

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