Nematotoxic activity against freshly hatched Meloidogyne incognita J2 (root-knot nematode) isolated from tomato roots assessed as induction of nematode paralysis measured 24 hr after immersion in compound test solutions
|
Meloidogyne incognita
|
1000.0
ug.mL-1
|
|
Journal : J Agric Food Chem
Title : Nematotoxic phenolic compounds from Melia azedarach against Meloidogyne incognita.
Year : 2012
Volume : 60
Issue : 47
First Page : 11675
Last Page : 11680
Authors : Aoudia H, Ntalli N, Aissani N, Yahiaoui-Zaidi R, Caboni P.
Abstract : In the present study, evaluated was the paralysis activity of whole Italian and Algerian Melia azedarach, commonly known as chinaberry, fruits and parts (seeds, wood, and kernels) against Meloidogyne incognita second stage juveniles (J(2)). The paralysis activity was evaluated in vitro after 1 h and 1 day immersion periods of nematodes in test solutions. Phenolic constituent components of the extracts were identified and quantified by high-performance liquid chromatography-mass spectrometry, while confirmation was performed by high-performance liquid chromatography-diode array. The water extract of the Italian M. azedarach fruit pulp (IPWE) showed significant nematicidal activity (EC(50/48h) = 955 μg/mL) and among its active ingredient components were p-coumaric acid and p-hydroxybenzoic acid (EC(50/48h) = 840 and 871 μg/mL, respectively). This is the first report of the nematicidal activity of M. azedarach pulp water extract and phenolic acids against the root knot nematode M. incognita.
Hypoglycemic activity in Rattus norvegicus albino Wistar (rat) streptozotocin-induced diabetic model assessed as reduction of plasma glucose level at 20 mg/kg, po qd for 60 days measured up to 180 min by oral glucose tolerance test
|
Rattus norvegicus
|
None
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 9
First Page : 2238
Last Page : 2250
Inhibition of baker's yeast alpha-glucosidase using p-nitrophenyl-alpha-D-glucopyranoside as substrate by spectrophotometry
|
Saccharomyces cerevisiae
|
2.11
|
|
Journal : Med Chem Res
Title : Two-dimensional quantitative structureactivity relationship study on polyphenols as inhibitors of -glucosidase
Year : 2012
Volume : 21
Issue : 12
First Page : 3984
Last Page : 3993
Authors : Rastija V, Beslo D, Nikolic S
Antioxidant activity assessed as DPPH scavenging activity after 2 hr by spectrophotometry
|
None
|
2.12
ug.mL-1
|
|
Journal : Med Chem Res
Title : 3,4-Dihydropyrimidin-2(1H)-one derivatives: Organocatalysed microwave assisted synthesis and evaluation of their antioxidant activity
Year : 2012
Volume : 21
Issue : 12
First Page : 4506
Last Page : 4511
Authors : Gangwar N, Kasana VK
Antioxidant activity in phosphate buffer at pH 6.6 assessed as reducing power measuring conversion of potassium ferricyanide to ferrous form after 10 min by spectrophotometry
|
None
|
10.0
ug.mL-1
|
|
Journal : Med Chem Res
Title : 3,4-Dihydropyrimidin-2(1H)-one derivatives: Organocatalysed microwave assisted synthesis and evaluation of their antioxidant activity
Year : 2012
Volume : 21
Issue : 12
First Page : 4506
Last Page : 4511
Authors : Gangwar N, Kasana VK
Antifungal activity against Verticillium dahliae assessed as inhibition of mycelial radial growth measured after 350 hr
|
Verticillium dahliae
|
2100.0
ug.mL-1
|
|
Journal : J Agric Food Chem
Title : Dysfunctionality of the xylem in Olea europaea L. Plants associated with the infection process by Verticillium dahliae Kleb. Role of phenolic compounds in plant defense mechanism.
Year : 2007
Volume : 55
Issue : 9
First Page : 3373
Last Page : 3377
Authors : Báidez AG, Gómez P, Del Río JA, Ortuño A.
Abstract : Xylem ultrastructural modification and the possible participation of phenolic compounds in the natural defense or resistance mechanisms of olive plants infected with Verticillium dahliae Kleb. were studied. Microscopic study showed that the mycelium propagated and passed from one element to another through the pit. The formation of tyloses and aggregates contributed to obstruction of the xylem lumen. In vivo changes in the levels of these phenolic compounds in infected olive plants and their antifungal activity against Verticillium dahliae Kleb., as revealed by in vitro study, strongly suggest that they are involved in natural defense or resistance mechanisms in this plant material, the most active being quercetin and luteolin aglycons, followed by rutin, oleuropein, luteolin-7-glucoside, tyrosol, p-coumaric acid, and catechin. .
Displacement of NLWAAQRYGRELRRMSD-K(FITC)-FVD from Bcl-2 (unknown origin) by fluorescence polarization assay
|
Homo sapiens
|
100000.0
nM
|
|
Journal : Med Chem Res
Title : Molecular docking study on anticancer activity of plant-derived natural products
Year : 2010
Volume : 19
Issue : 8
First Page : 817
Last Page : 835
Authors : Phosrithong N, Ungwitayatorn J
Antioxidant activity in liposomal model assessed as inhibition of Fe2 ions-induced lipid peroxidation
|
None
|
1.78
|
|
Journal : Med Chem Res
Title : QSAR modeling of anthocyanins, anthocyanidins and catechins as inhibitors of lipid peroxidation using three-dimensional descriptors
Year : 2009
Volume : 18
Issue : 7
First Page : 579
Last Page : 588
Authors : Rastija V, Medic-Saric M
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as reduction in glomerular expansion at 20 mg/kg, po administered via intragastric tube for 45 days using hematoxylin/eosin staining method
|
Rattus norvegicus
|
None
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as reduction in enlargement of glomerulus at 20 mg/kg, po administered via intragastric tube for 45 days using hematoxylin/eosin staining method
|
Rattus norvegicus
|
None
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatoprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as re-apperance of hepatic lobules at 20 mg/kg, po administered via intragastric tube for 45 days using hematoxylin/eosin staining method
|
Rattus norvegicus
|
None
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in plasma ACP level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 9.97+/-1.1 ug/dl)
|
Rattus norvegicus
|
9.52
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in plasma ALP level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 49.99+/-4.7 ug/dl)
|
Rattus norvegicus
|
50.87
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in plasma ALT level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 56.72 +/-5.2 ug/dl)
|
Rattus norvegicus
|
55.18
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in plasma AST level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 39.6 +/-3.3 ug/dl)
|
Rattus norvegicus
|
36.12
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as serum LDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 85.37 +/-8.8 mg/dl)
|
Rattus norvegicus
|
12.78
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as serum VLDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb =11.12 +/-0.3 mg/dl)
|
Rattus norvegicus
|
89.52
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as serum HDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb =65.21 +/-6.9 mg/dl)
|
Rattus norvegicus
|
68.65
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as serum triglyceride level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb =17.72 +/-1.3 mg/dl)
|
Rattus norvegicus
|
18.18
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as serum cholesterol level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 97.72 +/-7.3 mg/dl)
|
Rattus norvegicus
|
98.34
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatoprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as plasma ACP level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 28.7 +/-2.61 ug/dl)
|
Rattus norvegicus
|
11.98
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatoprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as plasma ALP level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 91.1 +/-9.2 ug/dl)
|
Rattus norvegicus
|
54.29
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatoprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as plasma ALT level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 97.11 +/-10.3 ug/dl)
|
Rattus norvegicus
|
59.71
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Hepatoprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as plasma AST level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 85.5 +/-9.21 ug/dl)
|
Rattus norvegicus
|
41.95
ug/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as serum VLDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 55.2 +/-4.5 mg/dl)
|
Rattus norvegicus
|
13.21
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as serum LDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 165.7 +/-14.35 mg/dl)
|
Rattus norvegicus
|
91.28
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as serum HDL level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 25.8 +/-1.6 mg/dl)
|
Rattus norvegicus
|
60.56
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as serum triglyceride level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 65.5 +/-7.9 mg/dl)
|
Rattus norvegicus
|
20.81
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as serum cholesterol level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 295.5 +/-17.1 mg/dl)
|
Rattus norvegicus
|
109.21
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in serum total protein level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 3.7 +/-0.9 g/dl)
|
Rattus norvegicus
|
6.58
g/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in serum creatinine level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 2.1 +/-0.9 mg/dl)
|
Rattus norvegicus
|
1.78
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in serum uric acid level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 1.5 +/-0.9 mg/dl)
|
Rattus norvegicus
|
0.99
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephroprotective activity in STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in serum urea level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 41.5 +/-4.9 mg/dl)
|
Rattus norvegicus
|
29.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephrotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in serum total protein level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 8.12 +/- 1.0 g/dl )
|
Rattus norvegicus
|
8.98
g/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephrotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in creatinine level in serum at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 1.62 +/- 0.2 mg/dl )
|
Rattus norvegicus
|
1.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephrotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in uric acid level in serum at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 0.96 +/- 0.93 mg/dl )
|
Rattus norvegicus
|
0.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Nephrotoxicity in Rattus norvegicus Wistar albino (rat) assessed as change in urea level in serum at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 24.12 +/- 2.3 mg/dl )
|
Rattus norvegicus
|
23.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as change in glycosylated hemoglobin of total hemoglobin at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 0.52 +/-0.03 % )
|
Rattus norvegicus
|
0.46
%
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in glycosylated hemoglobin of total hemoglobin at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 0.89 +/-0.03 %)
|
Rattus norvegicus
|
0.57
%
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as change in hemoglobin level at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 15.12 +/-1.3 mg/dl )
|
Rattus norvegicus
|
14.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in hemoglobin at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 8.5 +/-0.9 mg/dl)
|
Rattus norvegicus
|
14.98
mg/dl
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Toxicity in Rattus norvegicus Wistar albino (rat) assessed as change in body weight at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 238.2 +/-7.3 g)
|
Rattus norvegicus
|
239.67
g
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Antidiabetic activity against STZ-induced diabetic Rattus norvegicus Wistar albino (rat) assessed as change in body weight at 20 mg/kg, po administered via intragastric tube for 45 days (Rvb = 243.67 +/-8.9 g)
|
Rattus norvegicus
|
209.12
g
|
|
Journal : Med Chem Res
Year : 2012
Volume : 21
Issue : 12
First Page : 4535
Last Page : 4541
Inhibition of Helicobacter pylori urease
|
Helicobacter pylori
|
13.0
ug.mL-1
|
|
Journal : Med Chem Res
Title : Pharmacological profile of green tea and its polyphenols: a review
Year : 2012
Volume : 21
Issue : 11
First Page : 3347
Last Page : 3360
Authors : Bansal S, Syan N, Mathur P, Choudhary S
Antifungal activity against Penicillium sp. at 12.5 to 25 ug/ml after 96 hr by spectrophotometry
|
Penicillium sp.
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Antifungal activity against Aspergillus niger at 12.5 to 25 ug/ml after 96 hr by spectrophotometry
|
Aspergillus niger
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Antifungal activity against Fusarium oxysporum at 12.5 to 25 ug/ml after 96 hr by spectrophotometry
|
Fusarium oxysporum
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Antifungal activity against Hypocrea rufa at 12.5 to 25 ug/ml after 96 hr by spectrophotometry
|
Hypocrea rufa
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Antifungal activity against Trichoderma reesei at 12.5 to 25 ug/ml after 96 hr by spectrophotometry
|
Trichoderma reesei
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Bactericidal activity against Pseudomonas fluorescens at 3.1 ug/ml after 24 hr by BacLight bacterial viability fluorescence assay
|
Pseudomonas fluorescens
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Bactericidal activity against Erwinia amylovora at 1.6 ug/ml after 24 hr by BacLight bacterial viability fluorescence assay
|
Erwinia amylovora
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Bactericidal activity against Pectobacterium carotovorum at 3.1 ug/ml after 24 hr by BacLight bacterial viability fluorescence assay
|
Pectobacterium carotovorum
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Bactericidal activity against Xanthomonas euvesicatoria at 6.3 ug/ml after 24 hr by BacLight bacterial viability fluorescence assay
|
Xanthomonas euvesicatoria
|
None
|
|
Journal : J Agric Food Chem
Title : Phytotoxic and antimicrobial activities of catechin derivatives.
Year : 2004
Volume : 52
Issue : 5
First Page : 1077
Last Page : 1082
Authors : Veluri R, Weir TL, Bais HP, Stermitz FR, Vivanco JM.
Abstract : (+/-)-Catechin is a potent phytotoxin, with the phytotoxicity due entirely to the (-)-catechin enantiomer. (+)-Catechin, but not the (-)-enantiomer, has antibacterial and antifungal activities. Tetramethoxy, pentaacetoxy, and cyclic derivatives of (+/-)-catechin retained phytotoxicity. The results indicate that antioxidant properties of catechins are not a determining factor for phytotoxicity. A similar conclusion was reached for the antimicrobial properties. Centaurea maculosa (spotted knapweed) exudes (+/-)-catechin from its roots, but the flavanol is not re-absorbed and hence the weed is not affected. The much less polar tetramethoxy derivative may, however, be absorbed and hence be able to cause toxicity. Because of the combination of phytotoxicity and antimicrobial activity, (+/-)-catechin could be a useful natural herbicide and antimicrobial.
Antifeedant activity against third-instar Xanthogaleruca luteola assessed per cm2 leaf disk after 24 hr by leaf-disk choice test
|
Xanthogaleruca luteola
|
50.22
ug
|
|
Journal : Bioresour Technol
Title : Antifeedant activity of ethanolic extract from Flourensia oolepis and isolation of pinocembrin as its active principle compound.
Year : 2009
Volume : 100
Issue : 14
First Page : 3669
Last Page : 3673
Authors : Diaz Napal GN, Carpinella MC, Palacios SM.
Abstract : The ethanolic extract from Flourensia oolepis aerial parts showed strong antifeedant activity against the pest larvae, Epilachna paenulata, with an antifeedant index (AI%) of 99.1% at 100 microg/cm(2). Based on chromatographic fractionation of the extract, guided by bioassays on E. paenulata, the flavanone pinocembrin (1) was isolated as the most active principle. In a choice assay, compound 1 showed strong antifeedant activity against E. paenulata, Xanthogaleruca luteola and Spodoptera frugiperda with an AI% of 90, 94 and 91% (p<0.01) respectively, at 50 microg/cm(2). The dosages necessary for 50% feeding inhibition of the insects (ED(50)) were 7.98, 6.13 and 8.86 microg/cm(2), respectively. The feeding inhibitory activity of 1 against E. paenulata was compared with the activity of other structurally related flavonoids like naringenin, which was inactive up to 100 microg/cm(2), catechin which was nearly 6 times less active than 1, and quercetin which was equally active as 1. The effect of these on the feeding behavior of E. paenulata was also studied.
Antifeedant activity against third-instar Epilachna paenulata measured assessed per cm2 leaf disk after 24 hr by leaf disk choice test
|
Epilachna
|
47.6
ug
|
|
Journal : Bioresour Technol
Title : Antifeedant activity of ethanolic extract from Flourensia oolepis and isolation of pinocembrin as its active principle compound.
Year : 2009
Volume : 100
Issue : 14
First Page : 3669
Last Page : 3673
Authors : Diaz Napal GN, Carpinella MC, Palacios SM.
Abstract : The ethanolic extract from Flourensia oolepis aerial parts showed strong antifeedant activity against the pest larvae, Epilachna paenulata, with an antifeedant index (AI%) of 99.1% at 100 microg/cm(2). Based on chromatographic fractionation of the extract, guided by bioassays on E. paenulata, the flavanone pinocembrin (1) was isolated as the most active principle. In a choice assay, compound 1 showed strong antifeedant activity against E. paenulata, Xanthogaleruca luteola and Spodoptera frugiperda with an AI% of 90, 94 and 91% (p<0.01) respectively, at 50 microg/cm(2). The dosages necessary for 50% feeding inhibition of the insects (ED(50)) were 7.98, 6.13 and 8.86 microg/cm(2), respectively. The feeding inhibitory activity of 1 against E. paenulata was compared with the activity of other structurally related flavonoids like naringenin, which was inactive up to 100 microg/cm(2), catechin which was nearly 6 times less active than 1, and quercetin which was equally active as 1. The effect of these on the feeding behavior of E. paenulata was also studied.