Coronatine, syringomycin, syringopeptin, tabtoxin, and phaseolotoxin are the most intensively studied phytotoxins of Pseudomonas syringae, and each contributes significantly to bacterial virulence in plants. Coronatine functions partly as a mimic of methyl jasmonate, a hormone synthesized by plants undergoing biological stress. Syringomycin and syringopeptin form pores in plasma membranes, a pr...

Rhizobial-induced chlorosis in soybeans (Glcine uinax.) is caused by a phytotoxin produced in the nodules of the affected plants (1, 4). The phytotoxin has been isolated from nodules and partially characterized as a low molecular-weight amino compound (3). In the previous paper we reported finding an unidentified amino acid (unknown Y) in soybean nodules, the metabolism of which appeared to be ...

Abstract Pyricularia oryzae is one of the most devastating plant pathogens in world. This fungus produces several secondary metabolites including phytotoxin pyriculols, which are classified into 2 types: aldehyde form (pyriculol and pyriculariol) alcohol (dihydropyriculol dihydropyriculariol). Although interconversion between has been predicted, PYC10 gene for oxidation to known, responsible re...

Potato common scab is an economically important crop disease that is characterized by the formation of superficial, raised or pitted lesions on the potato tuber surface. The most widely distributed causative agent of the disease is Streptomyces scabies, which produces the phytotoxic secondary metabolite thaxtomin A that serves as a key virulence factor for the organism. Recently, it was demonst...

Abstract Background Phytotoxins of various classes and origin are often found in their cationic form the soil environment thus, overall behavior may be strongly affected by all geosorbents presenting cation exchange capacity (CEC). In addition to organic carbon (SOC), clays exhibit great potential as sorbents for chemicals. Therefore, 52 compounds major phytotoxin alkaloids, terpenoids steroids...

14-3-3 proteins have been found to regulate the plant enzyme nitrate reductase by reversible phosphoserine binding. Plant plasma-membrane H(+)-ATPases, transporters that are activated by the phytotoxin fusicoccin, appear to be regulated in a similar fashion.

In order to select phytotoxin producing rhizobacteria to control weed plants, twenty five bacterial strains previously isolated from the rhizospheres of various plants were grown in a liquid medium and, after cell removal by centrifugation, the liquid phases were freeze-dried and the products were extracted with ethyl acetate/methanol. The extracts were concentrated to dryness under vacuum and ...