Abstract
Turmeric ( Curcuma spp.) has numerous biological activities, including anticancer, antibacterial, antifungal and insecticidal properties. Here, we evaluated the plant growth‐inhibitory activities of two cultivars of Curcuma longa ( C. longa ; Ryudai gold and Okinawa ukon) against radish, cress, lettuce and Bidens pilosa ( B. pilosa ). The methanol extracts of both turmeric varieties inhibited the seed germination and seedling growth of all the tested plants. Ryudai gold had a significantly higher inhibitory effect on the seed germination and root and shoot growth of the plants than Okinawa ukon. Therefore, Ryudai gold was chosen for the isolation of plant growth‐inhibitory compounds using a silica gel column and high‐performance liquid chromatography. The structural identification of the compounds was carried out using 1 H NMR, 13 C NMR and liquid chromatography–tandem mass spectrometry. The growth inhibitors were identified as four curcuminoids; dihydrobisdemethoxycurcumin ( 1 ), bisdemethoxycurcumin ( 2 ), demethoxycurcumin ( 3 ) and curcumin ( 4 ). The IC 50 of the curcuminoids against the root and shoot growth of B. pilosa ranged from 8.7 ± 1.7 to 12.9 ± 1.8 and from 15.5 ± 1.8 to 38.9 ± 2.8 μmol L −1 , respectively. Compound 1 showed the lowest IC 50 against the root and shoot growth of B. pilosa . These results suggested that Ryudai gold has a potential growth‐inhibitory effect against B. pilosa .
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Claims 6
Claim · model-written summary
Methanol extracts of both turmeric varieties inhibited seed germination and seedling growth of all the tested plants.
- Taxon
- Curcuma longa
_W_IMG_2440.jpg?width=60)
Curcuma longae0 - Treatment
- methanol extracts of both turmeric varietiese1
- Outcome
- seed germination and seedling growthe1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_W_IMG_2440.jpg?width=500)
Verbatim
e0“two cultivars of Curcuma longa”
e1“The methanol extracts of both turmeric varieties inhibited the seed germination and seedling growth of all the tested plants”
Claim · model-written summary
Ryudai gold had a significantly higher inhibitory effect on seed germination and root and shoot growth than Okinawa ukon.
- Taxon
- Curcuma longaCurcuma longae0
- Material
- Ryudai golde2
- Treatment
- methanol extracts of both turmeric varietiese1
- Outcome
- inhibitory effect on the seed germination and root and shoot growthe2
- Direction
- highere2
- Comparator
- Okinawa ukone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two cultivars of Curcuma longa”
e1“The methanol extracts of both turmeric varieties inhibited the seed germination and seedling growth of all the tested plants”
e2“Ryudai gold had a significantly higher inhibitory effect on the seed germination and root and shoot growth of the plants than Okinawa ukon”
Claim · model-written summary
The IC50 of the curcuminoids against the root growth of Bidens pilosa ranged from 8.7 ± 1.7 to 12.9 ± 1.8 μmol L −1.
- Taxon
- Curcuma longaCurcuma longae0
- Interactor
- B. pilosa
Bidens pilosae3weed - Compound
- curcuminoidse3
- Outcome
- IC 50 of the curcuminoids against the roote3
- Value
- 8.7 ± 1.7 to 12.9 ± 1.8e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two cultivars of Curcuma longa”
e3“The IC 50 of the curcuminoids against the root and shoot growth of B. pilosa ranged from 8.7 ± 1.7 to 12.9 ± 1.8 and from 15.5 ± 1.8 to 38.9 ± 2.8 μmol L −1”
Claim · model-written summary
The IC50 of the curcuminoids against the shoot growth of Bidens pilosa ranged from 15.5 ± 1.8 to 38.9 ± 2.8 μmol L −1.
- Taxon
- Curcuma longaCurcuma longae0
- Interactor
- B. pilosaBidens pilosae3weed
- Compound
- curcuminoidse3
- Outcome
- IC 50 of the curcuminoids against the root and shoot growthe3
- Value
- 15.5 ± 1.8 to 38.9 ± 2.8 μmol L −1e3
- Qualifier
- shoot growthe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two cultivars of Curcuma longa”
e3“The IC 50 of the curcuminoids against the root and shoot growth of B. pilosa ranged from 8.7 ± 1.7 to 12.9 ± 1.8 and from 15.5 ± 1.8 to 38.9 ± 2.8 μmol L −1”
Claim · model-written summary
Compound 1 showed the lowest IC50 against the root and shoot growth of Bidens pilosa among the curcuminoids.
- Taxon
- Curcuma longaCurcuma longae0
- Interactor
- B. pilosaBidens pilosae4weed
- Compound
- Compound 1e4
- Outcome
- lowest IC 50 against the root and shoot growthe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two cultivars of Curcuma longa”
e4“Compound 1 showed the lowest IC 50 against the root and shoot growth of B. pilosa”
Claim · model-written summary
The growth inhibitors of turmeric Ryudai gold were identified as four curcuminoids.
- Taxon
- Curcuma longaCurcuma longae0
- Compound
- curcuminoidse5
- Outcome
- growth inhibitors were identified as four curcuminoidse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two cultivars of Curcuma longa”
e5“The growth inhibitors were identified as four curcuminoids”
The same questions in other papers
botanical · growth · Curcuma longa (turmeric)Results agree
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See all 7 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.