Abstract
Studies related to the allelopathic properties of plants have aroused great interest, since species that have compounds with allelopathic activity can be used as bioherbicides in the control of weeds. In this way, the aim of this study was to evaluate the allelopathic action of Dahlstedtia araripensis on the germination and growth of Calotropis procera and Zea mays. The bioassays were prepared using two 50 g portions of leaves, stem bark and D. araripensis roots, and each part of the plant received a hot treatment (1 L of distilled water at 100 °C) and one part cold (1 L of distilled water at 25 °C). The experimental design consisted of six treatments and the control group. The variables analyzed were: Index of Emergency Speed (IES), germinability, length and occurrence of necrotic radicles. The results indicated that the extracts interfered negatively on the germinability of the seeds, mainly on those of C. procera, since all extracts significantly inhibited its germination. In the seeds of C. procera and Z. mays there was delay in IES. The results indicated that the cold and hot extracts of the distinct parts of D. araripensis affected the development of the seedlings, besides promoting root necrosis. The observed effects may be due to the presence of secondary metabolites detected in the different extracts of D. araripensis. However, further research is required to prove the performance of such compounds, as well as their isolation, for future use asnatural herbicides.
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Claims 6
Claim · model-written summary
All Dahlstedtia araripensis extracts significantly inhibited Calotropis procera seed germination.
- Taxon
- Calotropis procera
.jpg?width=60)
Calotropis procerae2 - Treatment
- all extractse0
- Interactor
- Dahlstedtia araripensisDahlstedtia araripensise2other
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“all extracts significantly inhibited its germination”
e1“mainly on those of C. procera”
e2“the allelopathic action of Dahlstedtia araripensis on the germination and growth of Calotropis procera and Zea mays”
Claim · model-written summary
Extracts delayed emergence speed in Calotropis procera seeds.
- Taxon
- C. proceraCalotropis procerae0
- Treatment
- extractse1
- Interactor
- D. araripensisDahlstedtia araripensise1other
- Outcome
- IESe0
- Direction
- delaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the seeds of C. procera and Z. mays there was delay in IES.”
e1“the cold and hot extracts of the distinct parts of D. araripensis”
Claim · model-written summary
Extracts delayed emergence speed in Zea mays seeds.
- Treatment
- extractse1
- Interactor
- D. araripensisDahlstedtia araripensise1other
- Outcome
- IESe0
- Direction
- delaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the seeds of C. procera and Z. mays there was delay in IES.”
e1“the cold and hot extracts of the distinct parts of D. araripensis”
Claim · model-written summary
Cold and hot extracts of Dahlstedtia araripensis affected seedling development in the tested plants.
- Taxon
- Calotropis procera and Zea mays
Zea maysCalotropis procerae1 - Treatment
- cold and hot extracts of the distinct parts of D. araripensise0
- Interactor
- D. araripensisDahlstedtia araripensise0other
- Outcome
- development of the seedlingse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cold and hot extracts of the distinct parts of D. araripensis affected the development of the seedlings”
e1“Calotropis procera and Zea mays”
Claim · model-written summary
Cold and hot extracts of Dahlstedtia araripensis promoted root necrosis in the tested seedlings.
- Taxon
- Calotropis procera and Zea maysZea maysCalotropis procerae1
- Organ / stage
- roote0
- Treatment
- cold and hot extracts of the distinct parts of D. araripensise0
- Interactor
- D. araripensisDahlstedtia araripensise0other
- Outcome
- root necrosise0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cold and hot extracts of the distinct parts of D. araripensis affected the development of the seedlings, besides promoting root necrosis”
e1“Calotropis procera and Zea mays”
Claim · model-written summary
The authors suggested that detected secondary metabolites could account for the observed allelopathic effects.
- Taxon
- Calotropis procera and Zea maysZea maysCalotropis procerae1
- Interactor
- D. araripensisDahlstedtia araripensise0other
- Compound
- secondary metabolitese0
- Outcome
- observed effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The observed effects may be due to the presence of secondary metabolites detected in the different extracts of D. araripensis.”
e1“Calotropis procera and Zea mays”
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