Allelopathic influence of common buckwheat root residues on selected weed species

Szwed, Magdalena; Wiczkowski, Wiesław; Szawara-Nowak, Dorota; Obendorf, Ralph L.; Horbowicz, Marcin

doi:10.1007/s11738-019-2885-y

Cited by 18 publications

(18 citation statements)

References 36 publications

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“…This is an important finding confirming the fact that their direct role in allelopathy is minor or even negligible. Moreover, the enhanced content of phenolic compounds in the soil containing BPR was not accompanied by inhibition of barnyardgrass growth, as was the case in the BRR-amended soil (Szwed et al 2019b). The content of soil-bound phenolic compounds which was many times higher compared with their free counterparts may highlight other problems that need to be clarified: are these compounds important in allelopathy and are organisms living in the soil (plants, bacteria, fungi) able to desorb these compounds?…”

Section: Discussionmentioning

confidence: 75%

“…Phenolic compounds (phenolic acids, flavonoids) were analysed by HPLC-MS/MS for the concentration of their various derivatives (free, esters, and glycosides). The profile and content of phenolic compounds were determined according to the method described previously (Szwed et al 2019b). Briefly, the phenolic derivatives extracted were dissolved in 80% methanol and subjected to HPLC-MS/MS analysis.…”

Section: Methodsmentioning

confidence: 99%

“…It is well known that common buckwheat (Fagopyrum esculentum Moench) has substantial allelopathic properties (Kalinova et al 2007, Golisz et al 2007, Pużyńska et al 2019, Szwed et al 2019b). Studies on the allelopathic properties are often carried out using various extracts from plants for weed germination and/or the growth (Golisz et al 2007).…”

mentioning

confidence: 99%

“…It has recently been found that common buckwheat root residues (BRR) in soil have higher allelopathic potential than residues of entitre buckwheat plant (BPR) (Szwed et al 2019b). The biomass of 30-dayold plants of barnyardgrass and cleavers grown in bare soil was approximately 5-and 3.5-fold higher, respectively, than in plants grown in the presence of BRR.…”

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confidence: 99%

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The allelopathic properties of decomposing buckwheat residues are not directly related to phenolic compounds in soil

Szwed¹,

Mitrus²,

Wiczkowski³

et al. 2020

PLANT SOIL ENVIRON

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Previous studies have shown that residues of common buckwheat roots (BRR) (but not entire common buckwheat plants, BPR) in the soil inhibited the growth of barnyardgrass (Echinochloa crus-galli L.). The objective of the study was to determine how both the residues affect the content of free phenolics, their esters and glycosides in the soil. The aqueous extracts were used to analyse of unbound phenolic compounds, while those bound to the soil were extracted with sodium citrate. Moreover, an in vitro test was used to assess the allelopathic effect of phenolic compounds present in the soil against barnyardgrass. Among the analysed phenolic compounds after 7 days of BPR and BRR decomposition, only ortho-, meta- and para-coumaric acids and apigenin were found in measurable amounts in the soil. The concentrations of free phenolic compounds were very low. Much higher contents occurred for the esters of these compounds, while no glycosides were found. The contents of phenolic compounds bound to soil were many times higher than unbound ones. The 37-day decomposition period resulted in an increase in bound phenolics, while the content of unbound changed slightly. Overall, the levels of phenolic compounds in the soil with the BRR-amended soil and no-buckwheat residue control were low, and significantly higher in the soil with BPR. An in vitro test showed that m-, p-coumaric acids and apigenin added to growth medium at a concentration higher than in the soil did not affect barnyardgrass shoot growth. Since the levels of phenolic compounds in the soil containing BRR and control soil were low and similar, phenolic compounds cannot be directly responsible for the allelopathic properties caused by the presence of BRR.

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Section: Discussionmentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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The allelopathic properties of decomposing buckwheat residues are not directly related to phenolic compounds in soil

Szwed¹,

Mitrus²,

Wiczkowski³

et al. 2020

PLANT SOIL ENVIRON

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“…Despite being the subject of many studies there is no conclusive evidence of which compounds are responsible for the allelopathic suppression of weed growth, although it has been suggested that phenolic acids and flavonoids could be responsible [ 21 , 22 ]. Buckwheat roots exudate to the rhizosphere allelochemicals with inhibitory effect on weeds mainly palmitic and gallic acid [ 23 , 24 ]. The roots extracts of buckwheat contain allelopathic flavonoids mainly catechin, and isoquercitrin [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Effect of Quercetin, a Flavonoid from Fagopyrum esculentum Roots in the Radicle Growth of Phelipanche ramosa: Quercetin Natural and Semisynthetic Analogues Were Used for a Structure-Activity Relationship Investigation

Fernández‐Aparicio

Masi

Cimmino

et al. 2021

Plants

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Allelopathic potential of buckwheat roots on the radicle growth of the broomrape weed species Orobanche cumana and Phelipanche ramosa was studied. Buckwheat root exudates induced a significant growth inhibition in P. ramosa radicles but radicles of O. cumana were not affected. Among the metabolites present in the root organic extract we identified the flavonol quercetin and the stilbene p-coumaric acid methyl ester with only quercetin showing inhibitory effect on P. ramosa. The activity of quercetin was compared with other two similar flavanoids, the flavone apigenin and the dihydroflavanol 3-O-acetylpadmatin extracted respectively from Lavandula stoechas and Dittrichia viscosa plants. In this comparative assay only 3-O-acetylpadmatin besides quercetin, showed inhibition activity of radicle growth while apigenin was inactive. These results indicated that the presence of two ortho-free hydroxy groups of C ring, like catechol, could be an important feature to impart activity while the carbon skeleton of B ring and substituents of both A and B rings are not essential. Besides reduction of radicle growth, haustorium induction was observed at the tip of P. ramosa radicles treated with quercetin which swelled and a layer of papillae was formed. Activity of quercetin on haustorium induction in P. ramosa was assayed in comparison with the known haustorium-inducing factor 2,6-dimethoxy-p-benzoquinone (DMBQ) and a three partial methyl ether derivatives semisynthetized from quercetin. Results indicated that P. ramosa haustorium was induced by DMBQ at concentrations of 1–0.5 mM and quercetin and its derivatives at concentration range 0.1–0.05 mM.

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If phenolic compounds in the soil with buckwheat residues affect the emergence and growth of weed seedlings?

et al. 2020

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This study was conducted to determine if common buckwheat (Fagopyrum esculentum Moench) residues affect a phenolics composition in soil, and are effective for limiting emergence, growth and metabolic changes in barnyard grass (Echinochloa crus-galli (L.) P. Beauv.), wild oat (Avena fatua L.), yellow foxtail (Setaria pumila Schult.), silky windgrass (Apera spica-venti L.), catchweed bedstraw (Galium aparine L.), scentless mayweed (Matricaria inodora L.), and tiny vetch (Vicia hirsuta L.). In the study, the residues of 14-day-old buckwheat plants were used (cv. Hruszowska). After removal of the above-ground parts, the buckwheat root residues (BRR) remained in the soil for an additional 7 days before the weeds were sown. For comparison, under the same cultivation conditions, the effect of entire buckwheat plant residues (BPR) in soil was assessed. BPR and BRR in the soil caused a decrease in the emergence of all weed species except the tiny vetch. The growth of barnyard grass, wild oat, yellow foxtail, catchweed bedstraw, and scentless mayweed was inhibited by BRR, but not BPR. BRR had a particularly strong inhibitory effect on the growth of scentless mayweed (SM) and catchweed bedstraw (CB). Thirty-day-old SM and CB control plants were about 4 and 3.5 times higher, respectively, than plants growing in the presence of BRR. Furthermore, chlorophyll and carotenoid contents in the barnyard grass and catchweed bedstraw were more prominently reduced by BRR than BPR. Stressful conditions caused by buckwheat residues in the soil increased the level of phenolic compounds in the tissues of weeds examined. Soil with buckwheat residues contained a low level of phenolic compounds, which may indicate their slow release from the residue or rapid utilisation by microorganisms. These phenolic compounds probably cannot be directly responsible for allelopathic inhibition of weed emergence and growth.

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Allelopathic influence of common buckwheat root residues on selected weed species

Cited by 18 publications

References 36 publications

The allelopathic properties of decomposing buckwheat residues are not directly related to phenolic compounds in soil

The allelopathic properties of decomposing buckwheat residues are not directly related to phenolic compounds in soil

Allelopathic Effect of Quercetin, a Flavonoid from Fagopyrum esculentum Roots in the Radicle Growth of Phelipanche ramosa: Quercetin Natural and Semisynthetic Analogues Were Used for a Structure-Activity Relationship Investigation

If phenolic compounds in the soil with buckwheat residues affect the emergence and growth of weed seedlings?

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