Crude extracts from over 16 species of plants from the family Convolvulaceae were evaluated for phytotoxic activity against Agrostis stolonifera (bentgrass) and Lactuca sativa (lettuce) at 1000 (μg/mL. Ethanol extracts of Dicranostyles ampla Ducke were among the most active of those species tested. Systematic bioassay-guided fractionation of the ethanol extract of the aerial parts from this species was performed to identify specifically the phytotoxic compounds. Two phytotoxic flavonoids, dihydromyricetin (1) and myricetin-3-O-α-rhamnoside or myricetrin (2), were found to be responsible for much of the activity of the extract as a whole in the A. stolonifera and L. sativa bioassay. In a Lemna paucicostata bioassay, 1 and 2 had no activity at 100 μM.
VyvyanJR. (2002) Allelochemicals as leads for new herbicides and agrochemicals. Tetrahedron, 58, 1631–1646.
2.
DayanFE, RomagniJG, DukeSO. (2000) Investigating the mode of action of natural phytotoxins. Journal of Chemical Ecology, 26, 2079–2094.
3.
Rhui-ChengF, StaplesG. (1995) Convolvulaceae. Flora of China, 16, 271–325.
4.
Jenett-SiemsK, WeiglR, BöhmA, MannP, Tofern-ReblinB, OttSC, GhomianA, KalogaM, SiemsK, WitteL, HilkerM, MüllerF, EichE. (2005) Chemotaxonomy of the pantropical genus Merremia (Convolvulaceae) based on the distribution of tropane alkaloids. Phytochemistry, 66, 1448–1464.
5.
SchimmingT, Jenett-SiemsK, MannP, Tofern-ReblinB, MilsonJ, JohnsonRW, DeroinT, AustinDF, EichE. (2005) Calystegines as chemotaxonomic markers in the Convolvulaceae. Phytochemistry, 66, 469–480.
6.
Jenett-SiemsK, OttSC, SchimmingT, SiemsK, MüllerF, HilkerM, WitteL, HartmannT, AustinDF, EichE. (2005) Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina. Phytochemistry, 66, 223–231.
7.
DiniI, TenoreGC, DiniA. (2008) Saponins in Ipomoea batatas tubers: Isolation, characterization, quantification and antioxidant properties. Food Chemistry, 113, 411–419.
8.
YenFL, WuTH, LinLT, ChamTM, LinCC. (2008) Concordance between antioxidant activities and flavonol contents in different extracts and fractions of Cuscuta chinensis. Food Chemistry, 108, 455–462.
9.
GuptaP, Akanksha, SiripurapuKB, AhmadA, PalitG, AroraA, MauryaR. (2007) Anti-stress constituents of Evolvulus alsinoides: An ayurvedic crude drug. Chemical & Pharmaceutical Bulletin, 55, 771–775.
Pereda-MirandaR, MataR, AnayaAL, WickramaratneDBM, PezzutoJM, KinghornAD. (1993) Tricolorin A, major phytogrowth inhibitor from Ipomoea tricolor. Journal of Natural Products, 56, 571–582.
12.
LuSF, OyangQQ, GuoZW, YuB, HuiYZ. (1997) Total synthesis of tricolorin A. Journal of Organic Chemistry, 62, 8400–8405.
13.
LarsonDP, HeathcockCH. (1997) Total synthesis of tricolorin A. Journal of Organic Chemistry, 62, 8406–8418.
14.
ShuklaYN, SrivastavaA, KumarS, KumarS. (1999) Phytotoxic and antimicrobial constituents of Argyreia speciosa and Oenothera biennis. Journal of Ethnopharmacology, 67, 241–245.
15.
DasS, GangulySN, MukherjeeKK. (1999) Fatty acids and phytochemical components of Ipomoea spp. seeds. Natural Products Sciences, 5, 121–123.
16.
MannP, TofernB, KalogaM, EichE. (1999) Flavonoid sulfates from the Convolvulaceae. Phytochemistry, 50, 267–271.
17.
SaitoN, ChengJ, IchimuraM, YokoiM, AbeY, HondaT. (1994) Flavonoids in the acyanic flowers of Pharbitis nil. Phytochemistry, 35, 687–691.
18.
YaharaS, DomotoH, SugimuraC, NoharaT, NiihoY, NakajimaY, ItoH. (1994) An alkaloid and two lignans from Cuscuta chinensis. Phytochemistry, 37, 1755–1757.
19.
BaruahNC, SarmaJC, BaruaNC, SarmaS, SharmaRP. (1994) Germination and growth-inhibitory sesquiterpenes and a flavone from Tithonia diversifolia. Phytochemistry, 36, 29–36.
20.
BeningerCW, Abou-ZaidMM, KistnerALE, HallettRH, IqbalMJ, GrodzinskiB, HallJC. (2004) A flavanone and two phenolic acids from Chrysanthemum morifolium with phytotoxic and insect growth regulating activity. Journal of Chemical Ecology, 30, 589–606.
21.
ChaudhuriPK, SrivastavaR, KumarS, KumarS. (2004) Phytotoxic and antimicrobial constituents of Bacopa monnieri and Holmskioldia sanguinea. Phytotherapy Research, 18, 114–117.
22.
SimoesK, DuJ, KretzschmarFS, BroecklingCD, StermitzFS, VivancoJM, BragaMR. (2008) Phytotoxic catechin leached by seeds of the tropical weed Sesbania virgata. Journal of Chemical Ecology, 34, 681–687.
23.
ShenCC, ChangYS, HottLK. (1993) Nuclear magnetic resonance studies of 5,7-dihydroxyflavonoids. Phytochemistry, 34, 843–845.
24.
MarkhamKR, TernaiB, StanleyR, GeigerH, MabryTJ. (1978) Carbon-13 NMR studies of flavonoids-III: Naturally occurring flavonoid glycosides and their acylated derivatives. Tetrahedron, 34, 1389–1397.
25.
Addae-MensahI, AchenbachH. (1985) Terpenoids and flavonoids of Bridelia ferruginea. Phytochemistry, 24, 1817–1819.
26.
MichelA, JohnsonRD, DukeSO, SchefflerBE. (2004) Dose-response relationships between herbicides with different modes of action and growth of Lemna paucicostata: an improved ecotoxicological method. Environmental Toxicology and Chemistry, 23, 1074–1079.
