Abstract
T71e effect of teak leaf extracts was tested on germination of rice and two weeds: jungle rice and sedge. T71e methanol extract of deciduous leaves exhibited sustained inhibito1y action (Gfoc 56-61%) onjunglerice whereas water extract inhibited sedge germination by 25-45%. No extract exhibited significant inhibition on rice. The activity of methanol extract on junglerice was enhanced by 1. 7-2.1 times by col11mn chromatography. T7ie chloroform Faction was the most effective one exhibiting 100% inhibition on junglerice. Out of 5-11 compounds present in methanol extract and its col11mnfiactions,four phenolic acids (viz. salicylic acid, p-hydro;o.y benzoic acid, chlorogenic acid and tannic acid) were identified and quantified by HPTLC. Multiple Regression followed by Principal Component Ana(vsis indicated the dependency of observed activity on salicylic acid content in various combinations with benzoic acid, tannic acid and chlorogenic acid in the plant. Further exploration of the methanol extract of the deciduous lem·es was suggested for development of a potential pre-emergent herbicide. Nomenclature: Junglerice (Ec/1inoch/oa colona (L.)); sedge (Cype111s difformis L.); rice (01yza saliva L) Teak (Tectona grandis L.)
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Claims 8
Claim · model-written summary
Methanol teak leaf extract inhibited junglerice by 56-61%.
- Taxon
- junglerice
Echinochloa colonae0 - Treatment
- methanol extract of deciduous leavese0
- Interactor
- teakt0
- Outcome
- junglericee0
- Direction
- inhibito1ye0
- Value
- 56-61%e0
Not reportedInteractor roleComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T71e methanol extract of deciduous leaves exhibited sustained inhibito1y action (Gfoc 56-61%) onjunglerice”
t0“teak leaf extract”
Claim · model-written summary
Water extract inhibited sedge germination by 25-45%.
Not reportedComparator
Verbatim
e0“water extract inhibited sedge germination by 25-45%”
Claim · model-written summary
No extract significantly inhibited rice germination.
- Taxon
- rice
Oryza sativae0 - Treatment
- extracte0
- Outcome
- ricee0
- Direction
- Noe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No extract exhibited significant inhibition on rice.”
Claim · model-written summary
Column chromatography enhanced the methanol extract activity on junglerice 1.7-2.1 times.
- Taxon
- junglericeEchinochloa colonae0
- Treatment
- col11mn chromatographye0
- Outcome
- activity of methanol extract on junglericee0
- Direction
- enhancede0
- Value
- 1. 7-2.1 timese0
- Comparator
- methanol extracte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of methanol extract on junglerice was enhanced by 1. 7-2.1 times by col11mn chromatography.”
Claim · model-written summary
The chloroform fraction completely inhibited junglerice.
- Taxon
- junglericeEchinochloa colonae0
- Treatment
- chloroform Factione0
- Outcome
- inhibition on junglericee0
- Direction
- most effectivee0
- Value
- 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T7ie chloroform Faction was the most effective one exhibiting 100% inhibition on junglerice.”
Claim · model-written summary
Four phenolic acids were identified and quantified in the extract and fractions.
Verbatim
e0“four phenolic acids (viz. salicylic acid, p-hydro;o.y benzoic acid, chlorogenic acid and tannic acid) were identified and quantified by HPTLC.”
t0“teak”
Claim · model-written summary
Observed activity depended on salicylic acid content in combinations with three other acids.
Not reportedDirection
Verbatim
e0“Multiple Regression followed by Principal Component Ana(vsis indicated the dependency of observed activity on salicylic acid content in various combinations with benzoic acid, tannic acid and chlorogenic acid in the plant.”
t0“teak”
Claim · model-written summary
The authors suggested exploring deciduous leaf methanol extract as a pre-emergent herbicide.
Verbatim
e0“Further exploration of the methanol extract of the deciduous lem·es was suggested for development of a potential pre-emergent herbicide.”
t0“teak”
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botanical · organism · Oryza sativa (rice)Positive and negative results
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