Abstract
The use of extracts derived from different plants has gained popularity as an alternative option to manage weeds and support phenological development in plants. One of the main problems facing agricultural production is the intensive application of chemical fertilizers that harm the environment. This study investigated the biostimulant effects of the aqueous extracts of Verbesinasphaerocephala and Verbesinafastigiata on the germination and growth of tomato (Solanum lycopersicum) and American cucumber (Cucumis sativus) seedlings. The aqueous extracts of both species of Verbesina were tested at concentrations of 0.5 and 1%. Seed germination and seedling development under nursery conditions were evaluated. The seed germination percentage was reduced in all treatments with the extracts of both Verbesina species when compared to that of the control treatment, which was considered an allelopathic effect. However, seedling growth in pots showed different behavior, with the extracts beneficially affecting certain agronomic variables, such as root and leaf length. The results suggest potential uses for V. sphaerocephala and V. fastigiata extracts, although a greater range of action may be experienced through the effects of certain molecules on weed growth. Additional studies with chemical approaches are necessary to better direct the uses and applications of Verbesina biomolecules, as they also functioned as growth promoters.
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Claims 5
Claim · model-written summary
Verbesina sphaerocephala extract reduced tomato seed germination relative to control.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- extractse0
- Outcome
- seed germination percentagee0
- Direction
- reducede0
- Qualifier
- Verbesina sphaerocephalat0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed germination percentage was reduced in all treatments with the extracts of both Verbesina species when compared to that of the control treatment”
e1“tomato (Solanum lycopersicum)”
t0“Verbesina sphaerocephala”
Claim · model-written summary
Verbesina fastigiata extract reduced tomato seed germination relative to control.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- extractse0
- Outcome
- seed germination percentagee0
- Direction
- reducede0
- Qualifier
- Verbesina fastigiatat0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed germination percentage was reduced in all treatments with the extracts of both Verbesina species when compared to that of the control treatment”
e1“tomato (Solanum lycopersicum)”
t0“Verbesina fastigiata”
Claim · model-written summary
Verbesina sphaerocephala extract reduced cucumber seed germination relative to control.
Verbatim
e0“The seed germination percentage was reduced in all treatments with the extracts of both Verbesina species when compared to that of the control treatment”
e1“American cucumber (Cucumis sativus)”
t0“Verbesina sphaerocephala”
Claim · model-written summary
Verbesina fastigiata extract reduced cucumber seed germination relative to control.
Verbatim
e0“The seed germination percentage was reduced in all treatments with the extracts of both Verbesina species when compared to that of the control treatment”
e1“American cucumber (Cucumis sativus)”
t0“Verbesina fastigiata”
Claim · model-written summary
The extracts beneficially affected seedling root and leaf length in pots.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- extractse0
- Outcome
- root and leaf lengthe0
- Direction
- beneficially affectinge0
- Setting
- potse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling growth in pots showed different behavior, with the extracts beneficially affecting certain agronomic variables, such as root and leaf length”
e1“tomato (Solanum lycopersicum) and American cucumber (Cucumis sativus) seedlings”
The same questions in other papers
botanical · growth · Solanum lycopersicum (tomato)Positive and negative results
202 papers in the same direction as this paper · 87 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
287 papers more in this group
See all 291 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.