Abstract
The aim of this research was to examine the effect of fertilizer treatment on the content of polyphenols in velvetleaf and maize, grown without use of herbicides under controlled conditions (12h/12h, T 25?/22?C day/night). Plants were treated with organic - F1 and synthetic fertilizers - F2 and F3. The content of total phenols, individual polyphenolic acids and antioxidant activity of plant extracts were examined, as important indicators of the plant condition and its resistance to oxidative stress. The content of total phenols was determined spectrophotometrically (modified Folin-Ciocalteu method). The content of individual polyphenolic acids was determined by the high-performance liquid chromatography method, while measurement of polyphenols antioxidant activity was determined by the DPPH method. It was established that in maize, the application of fertilizers, neither in monoculture nor in competition with velvetleaf plants, caused statistically significant changes in the content of polyphenolic acids. However, in velvetleaf, the use of fertilizers led to an increase in the content of polyphenolic acids in conditions of competition vs monoculture. The content of chlorogenic, p-coumaric and trans-ferulic acids was statistically, significantly higher in plants of velvetleaf competition vs monoculture, and the content of chlorogenic, p-coumaric and cinnamic acids was lower in plants of maize competition vs monoculture. A statistically significant increase in the content of total polyphenols and their antioxidant activity in velvetleaf plants indicates the difficulty of removing weeds from crops, especially resistant populations. The research conducted and the results obtained confirm that weeds in competitive conditions manifest their natural competitive advantage, which is further enhanced by crop feeding.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-sa. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Fertilizers did not significantly change maize polyphenolic acid content in monoculture or competition with velvetleaf.
- Treatment
- application of fertilizerse0
- Interactor
- velvetleaf
Abutilon theophrastie0weed - Outcome
- content of polyphenolic acidse0
- Direction
- neither in monoculture nor in competition with velvetleaf plants, caused statistically significant changese0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize, the application of fertilizers, neither in monoculture nor in competition with velvetleaf plants, caused statistically significant changes in the content of polyphenolic acids.”
t0“maize”
Claim · model-written summary
Fertilizer use increased velvetleaf polyphenolic acid content in competition compared with monoculture.
- Taxon
- velvetleafAbutilon theophrastie0
- Treatment
- use of fertilizerse0
- Outcome
- content of polyphenolic acidse0
- Direction
- increasee0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in velvetleaf, the use of fertilizers led to an increase in the content of polyphenolic acids in conditions of competition vs monoculture.”
Claim · model-written summary
Velvetleaf competition was associated with higher chlorogenic, p-coumaric and trans-ferulic acid contents than monoculture.
- Taxon
- velvetleafAbutilon theophrastie0
- Outcome
- content of chlorogenic, p-coumaric and trans-ferulic acidse0
- Direction
- highere0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of chlorogenic, p-coumaric and trans-ferulic acids was statistically, significantly higher in plants of velvetleaf competition vs monoculture”
Claim · model-written summary
Maize in competition had lower chlorogenic, p-coumaric and cinnamic acid contents than maize monoculture.
- Outcome
- content of chlorogenic, p-coumaric and cinnamic acidse0
- Direction
- lowere0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of chlorogenic, p-coumaric and cinnamic acids was lower in plants of maize competition vs monoculture.”
t0“maize”
Claim · model-written summary
Velvetleaf total polyphenols and antioxidant activity increased significantly.
- Taxon
- velvetleafAbutilon theophrastie0
- Outcome
- content of total polyphenols and their antioxidant activitye0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A statistically significant increase in the content of total polyphenols and their antioxidant activity in velvetleaf plants”
Claim · model-written summary
The authors infer that competitive weeds have a natural advantage enhanced by crop feeding.
Verbatim
e0“weeds in competitive conditions manifest their natural competitive advantage, which is further enhanced by crop feeding.”
The same questions in other papers
fertilization · Abutilon theophrasti · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.