Methanolic extracts of diff erent parts of fi ve medicinal plants, Ferula assafoetida L. resin, Grewia asiatica L. leaves, Ipomoea hederacea Jacq. seeds, Lepidium sativum L. seeds and Terminalia chebula Retz. fruits were tested in vitro for their cytotoxic, phytotoxic, insecticidal, nematicidal and anthelmintic activities. Ipomoea hederacea showed very signifi cant phytotoxic and cytotoxic acti...

A pathogenic isolate of Fusarium, F. oxysporum f. sp. batatas O-17 (PF), causes wilt disease in leaf etiolation in sweet potato (Ipomoea batatas) and morning glory (Ipomoea tricolor). Extracts from PF cultures were screened for phytotoxic components using a growth inhibition assay with morning glory seedlings. The extracts were fractionated using differential solvent extraction and two active c...

Fine fescue grasses displace neighboring plants by depositing large quantities of an aqueous phytotoxic root exudate in the soil rhizosphere. Via activity-guided fractionation, we have isolated and identified the nonprotein amino acid m-tyrosine as the major active component. m-Tyrosine is significantly more phytotoxic than its structural isomers o- and p-tyrosine. We show that m-tyrosine expos...

ESR Signals, Spin-Trapping, N itro/N on-N itro Diphenyl Ethers, Chloroplasts, Electron Transport Phenyl-/-butylnitrone can be used to trap light-induced radicals with isolated chloroplasts, measurable by ESR technique. The radical signals are dramatically am plified and their lifetim e prolonged in the presence of peroxidizing diphenyl ethers. A pora-substitution with —N 0 2, —Cl or I is necess...

ArisaemajacquemontiiBlume (Araceae) is reputed for its physiological properties in the folk medicine system and used in Chinese herbal medicine as anti-convulsant. Methanolic extracts of roots and fruits, the chloroform extracts of roots and shoots of ArisaemajacquemontiiBlume were investigated for immunomodulatory,antileishmanialand phytotixic activities. Immunomodulatory activitywas investiga...

Hyptis suaveolens (Lamiaceae) is an exotic invasive plant in many countries. Earlier studies reported that the aqueous, methanol, and aqueous methanol extract of H. suaveolens and its residues have phytotoxic properties. However, to date, the phytotoxic substances of this plant have not been reported. Therefore, the objectives of this study were isolation and identification of phytotoxic substa...