Preliminary phytochemical constituents and phytotoxic effect of <i>Albizia lebbeck</i> (L.) Benth on <i>Sorghum bicolor</i>

Abstract

The preliminary Phytochemical investigations and phytotoxic effects of aqueous leaf extracts of Albizia lebbeck on Sorghum bicolor was assessed. The result from phytochemical screening revealed that all the allelochemicals tested where found present except steroids and phlobatannins when petroleum ether, methanol and water extracts were used. Petroleum ether extract show the presence of amino acids, protein and glycosides while methanol and water extracts showed their absence. Alkaloids, anthraquinones and acids were found present when methanol was used and absent using petroleum ether and water extracts. These allelochemicals are all important allelopathic sources. The leaf extract slowed down the rate of growth of the radicle and plumule of Sorghum bicolor seeds when compared to control. But these inhibitions were not significantly different at 5% level. The degree of inhibition increased with increase of concentration of the extracts hence inhibitions were prominent at extract of higher concentrations.

Phytochemical Screening, Antibacterial Activity and Bioautography of &lt;i&gt;Sorindeia madagascariensis&lt;/i&gt;, &lt;i&gt;Mucuna stans&lt;/i&gt;, and &lt;i&gt;Albizia harveyi&lt;/i&gt;

“…With exception to alkaloids, all tested phytochemicals were detected in the leaf extract of A. harveyi. This is in conformity with other reports whereby, together with other phytochemicals, saponins and flavonoids have been largely detected in several organs of most Albizia species [18,[52][53][54].…”

Intraspecific Variation of Phytochemicals, Antioxidant, and Antibacterial Activities of Different Solvent Extracts of Albizia coriaria Leaves from Some Agroecological Zones of Uganda

“…e results of the present study agreed well with previous reports on A. coriaria stem bark which reported the presence of tannins, saponins, alkaloids, flavonoids, terpenes, and cardiac glycosides as the major secondary metabolites [50][51][52][53][54][55]62]. Further, the identified metabolites have been previously reported in the leaf extracts of other Albizia species such as A. lebbeck (L.) Benth [93] and A. harveyi [76]. e absence of alkaloids was previously reported for ethyl acetate and aqueous extracts of A. lebbeck leaves [93,94] and A. zygia leaves [95] as well as ethanolic leaf extracts of A. harveyi [76].…”

“…Further, the identified metabolites have been previously reported in the leaf extracts of other Albizia species such as A. lebbeck (L.) Benth [93] and A. harveyi [76]. e absence of alkaloids was previously reported for ethyl acetate and aqueous extracts of A. lebbeck leaves [93,94] and A. zygia leaves [95] as well as ethanolic leaf extracts of A. harveyi [76]. e total absence of steroids in A. coriaria leaves corroborates a previous observation in which steroids were absent in ethyl acetate and aqueous extracts of A. lebbeck leaves [94].…”

Performance of seed-seedling continuum of two agroforestry tree species under inter-specific competition

“…The allelopathic in uence of A. saman seeds on A. lebbeck during germination in the mixture or even associated mechanisms needs further investigation. One possible mechanism is the higher amount of phytochemicals that are found in the seeds of A. saman which may produce a noticeable amount of phytotoxic chemicals such as tannin, phytic acid, and saponin during the decomposition of their seed coat (Mariod et al, 2017;Mishra et al, 2010;NAS, 1979) and prohibit seed germination of A. lebbeck in mixtures (Lawan et al, 2017). Furthermore, the physical movement of soil caused by each germinant may also in uence germination of subsequent seeds.…”