Journal ArticleDOI
Allelopathic activity of buckwheat: isolation and characterization of phenolics
Reads0
Chats0
TLDR
In this paper, aqueous and organic solvent extracts of the aerial parts of common buckwheat inhibited the root and shoot growth of lettuce seedlings in laboratory and field experiments.Abstract:
Laboratory and field experiments were conducted to assess the allelopathic potential of buckwheat. In the field, buckwheat demonstrated strong inhibitory activity by suppressing weeds. In laboratory studies, aqueous and organic solvent extracts of the aerial parts of common buckwheat inhibited the root and shoot growth of lettuce seedlings. The chloroform and ethyl acetate extracts showed maximum activity, and plants grown in the presence of the ethyl acetate extract showed severe root browning. The allelopathic constituents of the ethyl acetate phase were isolated and identified as gallic acid and (+)-catechin by nuclear magnetic resonance spectroscopy. Gallic acid and (+)-catechin were present in the upper part of buckwheat at concentrations of 0.02 and 0.01%, of fresh weight, respectively. Gallic acid was found to be selectively and strongly inhibitory to root and shoot growth of tested plants at 100 and 10 μg ml−1. (+)-Catechin, however, inhibited plant growth to a lesser extent. These result...read more
Citations
More filters
Journal ArticleDOI
Phenolics and plant allelopathy.
TL;DR: The main purpose of this review is to highlight the allelopacthic potential of phenolic compounds to provide methods to solve various ecology problems, especially in regard to the sustainable development of agriculture, forestry, nature resources and environment conservation.
Journal ArticleDOI
Enantiomeric-Dependent Phytotoxic and Antimicrobial Activity of (±)-Catechin. A Rhizosecreted Racemic Mixture from Spotted Knapweed
TL;DR: It is found that (−)-catechin is a root-secreted phytotoxin that undoubtedly contributes to spotted knapweed's invasive behavior in the wild.
Journal ArticleDOI
Root exudate is allelopathic in invaded community but not in native community: field evidence for the novel weapons hypothesis
TL;DR: This first in situ test of the novel weapons hypothesis supports the notion that novel biochemical constituents of some invasive species may contribute to their success, and indicates that some species in the native range of C. maculosa may be adapted to its particular biochemical traits.
Journal ArticleDOI
Allelopathy and plant invasions: traditional, congeneric, and bio-geographical approaches
TL;DR: Three approaches to examine allelopathy as a mechanism for invasion are discussed and a data set for congeneric Lantana and Prosopis is presented to illustrate how the congeneric approach can be used, and experimentally how traditional and bio-geographic approaches can be integrated to shed light on allelopathic in exotic plant invasions are demonstrated.
Journal ArticleDOI
No evidence for trade‐offs: centaurea plants from america are better competitors and defenders
TL;DR: It is hypothesized that Centaurea maculosa experiences strong directional selection on novel competitive and defense traits in its new range, suggesting that the evolution of increased competitive ability may not always be driven by physiological trade-offs between the allocation of energy or resources to growth or to defense.
References
More filters
Journal ArticleDOI
Secondary compounds as protective agents
TL;DR: Insect Chemoreceptors, Insect-deterrent Properties of Secondary Compounds, and the Complexity of Allelopathy.
Journal ArticleDOI
Allelopathy—An update
TL;DR: There has been a rapid advance in knowledge of mechanisms of action of known allelopathic compounds, at increasingly more fundamental levels, and evidence is mounting that inhibition of nitrification increases as succession progresses toward the climax vegetation, at least in many vegetation types.
Journal ArticleDOI
The Role of Chemical Inhibition (Allelopathy) in Vegetational Composition
TL;DR: The deterioration of old Salvia stands, apparently by auto-initoxication, suggests that allelopathy could be a significant factor in plant succession in many kinds of vegetation.
Journal ArticleDOI
Use of phytotoxic plant residues for selective weed control
Alan R. Putnam,Joseph Defrank +1 more
TL;DR: Water extracts of sorghum herbage were toxic to indicator species in sterile bioassays: this suggests that phytotoxins are directly released by the plant residues.