In:
Journal of Agricultural Science, Canadian Center of Science and Education, Vol. 9, No. 1 ( 2016-12-07), p. 204-
Abstract:
The effects of aqueous and ethanol extracts and leaf fractions of 〈 em 〉 Psychotria viridis 〈 /em 〉 Ruiz & amp; Pavon (chacrona) at different concentrations on the germination and initial growth of 〈 em 〉 Lactuca sativa 〈 /em 〉 L. were tested, and the phenolic and flavonoid compounds of these extracts and fractions were assessed. The bioassays consisted of the following treatments: crude aqueous extract (CAE) at 25, 50, 75 and 100% concentration, crude ethanol extract (CEE) and ethyl acetate, dichloromethane and methanol fractions at 6.25, 12.5, 25, 50 and 100% concentration and a control group. All treatments consisted of five replicates. The CAE, CEE and the ethyl acetate fraction of 〈 em 〉 P. viridis 〈 /em 〉 caused both positive and negative effects on the seeds and seedlings of 〈 em 〉 L. sativa 〈 /em 〉 . 〈 em 〉 〈 /em 〉 By contrast, the dichloromethane and methanol fractions only caused negative effects on 〈 em 〉 L. sativa 〈 /em 〉 . The following compounds were identified in the extracts and fractions: gallic acid, chlorogenic acid, caffeic acid, ellagic acid, catechin, orientin, vitexin, quercetin, apigenin, rutin and luteolin, and the presence of the alkaloid N,N-dimethyltryptamine (DMT) has also been reported in the literature. 〈 em 〉 P. viridis 〈 /em 〉 had allelopathic effects in all types of plant extracts and fractions tested, and one of these compounds or their combined action may account for these effects.
Type of Medium:
Online Resource
ISSN:
1916-9760
,
1916-9752
DOI:
10.5539/jas.v9n1p204
Language:
Unknown
Publisher:
Canadian Center of Science and Education
Publication Date:
2016
detail.hit.zdb_id:
2501913-2
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