Abstract
Soybean (Glycine max (L.) Merrill) is an agricultural crop with a large increase in production in the last three decades and is an essential component in the manufacture of animal and human food. Understanding the interactions between crop and other plant species used as green manure that can improve yield and so reduce environmental damage. Forages can release secondary metabolites in the environment that influence in a beneficial or harmful way to other plants, characterizing the allelopathy process. The Níger (Guizotia abyssinica Cass.) is used in agricultural systems because it releases allelochemicals, especially flavonoids. Therefore, this study is aimed to evaluate the allelopathic effects of the Niger straw on the germination and initial growth of soybean seedlings. The treatments consisted of aqueous extracts of niger stems, leaves and roots in different concentrations (0; 25; 50; 75 and 100%). For each treatment, five replications were performed, each composed by a 25 seeds distributed in gearbox kept in incubator chamber for 7 days at 25ºC and 12 hours photo period. The experimental design was completely randomized and the data were evaluated by analysis of variance and the means of treatments compared by Tukey’s test at 5% significance. The results show a reduction in germination and initial growth of soybean seedlings submitted to aqueous extract of niger stem and roots. In contrast, the aqueous extract of the Niger leaves increased the length of soybean seedlings. The allelopathic effects of the Niger probably occur due to the presence of flavonoids in the tissues of this plant species.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 4
Claim · model-written summary
Niger stem extract reduced soybean seedling germination and initial growth.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- seedlingse0
- Treatment
- aqueous extract of niger stem and rootse0
- Interactor
- niger
Guizotia abyssinicae0other - Outcome
- germination and initial growthe0
- Direction
- reductione0
- Qualifier
- steme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max (L.) Merrill)”
e0“a reduction in germination and initial growth of soybean seedlings submitted to aqueous extract of niger stem and roots.”
Claim · model-written summary
Niger roots extract reduced soybean seedling germination and initial growth.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- seedlingse0
- Treatment
- aqueous extract of niger stem and rootse0
- Interactor
- nigerGuizotia abyssinicae0other
- Outcome
- germination and initial growthe0
- Direction
- reductione0
- Qualifier
- rootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max (L.) Merrill)”
e0“a reduction in germination and initial growth of soybean seedlings submitted to aqueous extract of niger stem and roots.”
Claim · model-written summary
Niger leaf extract increased soybean seedling length.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- aqueous extract of the Niger leavese0
- Interactor
- NigerGuizotia abyssinicae0other
- Outcome
- length of soybean seedlingse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max (L.) Merrill)”
e0“the aqueous extract of the Niger leaves increased the length of soybean seedlings.”
Claim · model-written summary
The authors suggest niger flavonoids may explain the allelopathic effects.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- NigerGuizotia abyssinicae0other
- Compound
- flavonoidse0
- Outcome
- allelopathic effectse0
- Qualifier
- probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max (L.) Merrill)”
e0“The allelopathic effects of the Niger probably occur due to the presence of flavonoids in the tissues of this plant species.”
e1“The Níger (Guizotia abyssinica Cass.) is used in agricultural systems”
The same questions in other papers
botanical · organism · Glycine max (soybean)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
4 papers more in this group
See all 8 papers →botanical · growth · Glycine max (soybean)Positive and negative results
35 papers in the same direction as this paper · 79 in the opposite direction
- positive
- positive
- positive
111 papers more in this group
See all 115 papers →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.