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Novel Phytoalexins (Oryzalexins A, B and C) Isolated from Rice Blast Leaves Infected with Pyricularia oryzae. Part I: Isolation, Characterization and Biological Activities of Oryzalexins
The basis of the structures of Oryzalexins A, B and C was laid by spectroscopic methods and their inhibitory activities against spore germination and germ tube growth of P. oryzae were assayed. Expand
Structure of the host-specific pathotoxins produced by Phyllosticta maydis
Abstract Linear polyketol structures of two host-specific pathotoxins from Phyllosticta maydis (PM-toxin B and PM-toxin C) were elucidated by MS fragmentation patterns of the toxins and theirExpand
Isolation of 5-(8′Z-heptadecenyl)-resorcinol from etiolated rice seedlings as an antifungal agent
Abstract A new antifungal substance against rice blast fungus ( Pyricularia oryzae ), 5-(8′Z-heptadecenyl)resorcinol, was isolated from etiolated rice seedlings together with a mixture of itsExpand
Plant pathotoxins from Alternaria citri: The major toxin specific for rough lemon plants
A pathotype of the fungus Alternaria citri that attacks rough lemon plants produces several toxins in culture which specifically damage rough lemon and Rangpur lime plants, and contains a biologically inactive, partially analogous, component possessing a tetrahydropyran ring. Expand
Nordihydroguaiaretic Acid, of a New Family of Microtubule-stabilizing Agents, Shows Effects Differentiated from Paclitaxel
Observations indicate that NDGA belongs to a novel family of microtubule-stabilizing drugs, although structurally unrelated to paclitaxel, that stabilize microtubules in a way similar to that of pac litaxel and compete for paclitxel binding to tubulin. Expand
Structures of Oryzalic Acid B and Three Related Compounds, a Group of Novel Antibacterial Diterpenes, Isolated from Leaves of a Bacterial Leaf Blight-Resistent Cultivar of Rice
Oryzalic acid B and its related compounds were isolated from healthy flag leaves of a bacterial leaf blight-resistant cultivar of rice as a group of novel antibacterial compounds and determined to be ent-kaurane or ent-kaurene analogues. Expand
Plant pathotoxins from Alternaria citri: The minor ACRL toxins
Five host-specific pathotoxins, ACRL toxins II, III, III′, IV and IV′, were isolated from the culture broth of Alternaria citri, the fungus causing brown spot disease of rough lemon, indicating that the ACRL minor toxins were a group of analogous compounds of different chain lengths all of which have a α-pyrone group, in contrast to the dihydro-α-pyrsone group in toxin I. Expand