Abstract
Plants that produce secondary metabolites with allelopathic activity or phytotoxicity can be biotechnologically important, serving as sources of allelochemicals, and thus contributing to the agroindustrial sector. Vismia japurensis (Hypericaceae) is an Amazonian species that grows in clumps called vismiais, from which most other plants are absent. Accordingly, the objective of this study was to identify possible phytotoxicity effects of hexane and methanol extracts of Vismia japurensis leaves and branches in vivo and from seedlings grown in vitro on Lactuca sativa. In addition, fresh and dry leaves were assayed by the sandwich method in order to determine their ability to release allelochemicals. The hexanic extract from in vitro seedlings reduced germination by 10%, while the methanol extract produced a 16% reduction in germination speed. Root growth of Lactuca sativa was inhibited by 64.7% when subjected to hexane leaf extract, by 39.3% under the influence of hexane branch extract, and by 96.09% for in vitro seedling hexanic extract. When analysed by thin layer chromatography and 1H nuclear magnetic resonance, extracts showed evidence of terpenes, anthraquinones and flavonoids, with greater intensity of signals in the aromatic region of in vitro seedling hexanic extract. Clearly, Vismia japurensis has a high biotechnological potential in terms of the production of substances of low polarity with capacity to interfere in plant development.
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Claims 7
Claim · model-written summary
Hexanic extract from in vitro Vismia seedlings reduced lettuce germination by 10%.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Treatment
- hexanic extract from in vitro seedlingse1
- Outcome
- germinatione1
- Direction
- reducede1
- Value
- 10%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedlings grown in vitro on Lactuca sativa”
e1“The hexanic extract from in vitro seedlings reduced germination by 10%, while the methanol extract produced a 16% reduction in germination speed”
Claim · model-written summary
Methanol extract produced a 16% reduction in lettuce germination speed.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- methanol extracte1
- Outcome
- germination speede1
- Direction
- reductione1
- Value
- 16%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedlings grown in vitro on Lactuca sativa”
e1“The hexanic extract from in vitro seedlings reduced germination by 10%, while the methanol extract produced a 16% reduction in germination speed”
Claim · model-written summary
Hexane leaf extract inhibited lettuce root growth by 64.7%.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- hexane leaf extracte0
- Outcome
- Root growthe0
- Direction
- inhibitede0
- Value
- 64.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth of Lactuca sativa was inhibited by 64.7% when subjected to hexane leaf extract, by 39.3% under the influence of hexane branch extract, and by 96.09% for in vitro seedling hexanic extract”
Claim · model-written summary
Hexane branch extract inhibited lettuce root growth by 39.3%.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- hexane branch extracte0
- Outcome
- Root growthe0
- Direction
- inhibitede0
- Value
- 39.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth of Lactuca sativa was inhibited by 64.7% when subjected to hexane leaf extract, by 39.3% under the influence of hexane branch extract, and by 96.09% for in vitro seedling hexanic extract”
Claim · model-written summary
In vitro seedling hexanic extract inhibited lettuce root growth by 96.09%.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- in vitro seedling hexanic extracte0
- Outcome
- Root growthe0
- Direction
- inhibitede0
- Value
- 96.09%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth of Lactuca sativa was inhibited by 64.7% when subjected to hexane leaf extract, by 39.3% under the influence of hexane branch extract, and by 96.09% for in vitro seedling hexanic extract”
Claim · model-written summary
Extracts of Vismia japurensis showed evidence of terpenes, anthraquinones and flavonoids.
- Taxon
- Vismia japurensisVismia japurensist0
- Outcome
- evidence of terpenes, anthraquinones and flavonoidse0
Verbatim
e0“extracts showed evidence of terpenes, anthraquinones and flavonoids”
t0“Vismia japurensis”
Claim · model-written summary
The in vitro seedling hexanic extract had greater signal intensity in the aromatic region.
- Taxon
- Vismia japurensisVismia japurensist0
- Material
- in vitro seedling hexanic extracte0
- Outcome
- greater intensity of signals in the aromatic regione0
Verbatim
e0“with greater intensity of signals in the aromatic region of in vitro seedling hexanic extract”
t0“Vismia japurensis”
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