Allelopathic Potential of Sugar Sorghum (Sorghum Bicolor (L.) Moench) Seeds

Abstract

Allelopathic effect of water extracts of crushed sweet sorghum seeds of hybrids ‘Medovyi’ and ‘Dovista’ and variety ‘Sylosne 42’ and their effect on sugar beet (Beta vulgaris L.) seeds germination of hybrid ‘Ukrainian MS 97’ is presented. Water extracts of various concentrations (from 5 to 50 %) were prepared. The results were compared with the control treatment (distilled water). To estimate the growth rate of plants, the number of buds and leaves, plant height and the general condition of plants were examined. In regard to the chemical interaction of crops in mixed cropping, it was found that water extracts from sorghum seeds have a significant amount of allelopathically active substances revealing both phytotoxic and stimulating effects on the germination and germination vigour of sugar beet seeds. The water extracts of ‘Medovyi’ seeds showed the lowest allelopathic effect compared to other cultivars under study. Water extract of ‘Sylosne 42’ appeared relatively tolerant to germination of sugar beet seeds. The extract of ‘Medovyi’ seeds was filtered and added into the agar medium on which the clones of Beta vulgaris L. were planted. Allelopathically active substances did not affect sugar beet plants on the 7th day after planting. A decrease in the number of buds, leaves and plant height was recorded on the 14th day. On the 21st day, sugar beet plants looked suppressed and eventually died off. Understanding of physical and biochemical mechanisms of plants interaction allows selecting physiologically compatible plants for high-productive phytocoenoses.

Bioherbicidal Activity and Metabolic Profiling of Potent Allelopathic Plant Fractions Against Major Weeds of Wheat—Way Forward to Lower the Risk of Synthetic Herbicides

“…High antioxidant potential of plants could be a source of their allelopathicity as well (El-Gawad et al, 2019). Aqueous extracts of R. communis, T. aestivum, and S. bicolor have also been employed for weed suppression (Wu et al, 2001;Mahmood et al, 2013;Naz and Bano, 2014;Saadaoui et al, 2015;Renathielly et al, 2016;Al-Samarai et al, 2018;Eassa et al, 2018;Storozhyk et al, 2019), but their methanolic extracts have not been investigated as yet. Water extracts of different species of artemisia were also used as a bio-control agent against weeds (Lydon et al, 1997;Barney et al, 2005;Onen, 2013;Kapoor et al, 2019;Benarab et al, 2020); but allelopathy of A. santolinifolia is still to be established.…”

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“…Thus, the allelopathic activity of a plant is determined by such main properties as the formation, ability to accumulate and release into the environment knees, and allelopathic tolerance -resistance to secretions of other plants or one's own (Storozhyk, 2019). The method of labeled atoms confirmed the presence of root secretions (Laurent Simon et al, 2019;Ćeranić et al, 2020;Vivanco et al, 2012).…”

Allelopathic Potential of Sweet Sorghum Root Exudates and Identification of the Relevant Allelochemicals

“…On the other hand, the allelopathic potential of sweet sorghum has attracted the attention of scientists for weed management due to its competitive structure and morphology [8,9]. Allelopathy is a biological phenomenon in which an organism produces one or more bio-chemicals that influence the growth, survival, and reproduction of other organisms [10,11].…”