Chemical Studies on Brown-spot Disease of Tobacco Plants

Comparative Genomics of Pathogens Causing Brown Spot Disease of Tobacco: Alternaria longipes and Alternaria alternata

The genus Alternaria is a group of infectious/contagious pathogenic fungi that not only invade a wide range of crops but also induce severe allergic reactions in a part of the human population. In this study, two strains Alternaria longipes cx1 and Alternaria alternata cx2 were isolated from different brown spot lesions on infected tobacco leaves. Their complete genomes were sequenced, de novo ...

Chemical Studies on the Virus of Tobacco Mosaic

A method for the isolation, from mosaic-diseased Turkish tobacco plants, of a crystalline protein possessing the properties of tobacco mosaic virus has been described (1, 2). The method consists essentially in precipitation of the globulin fraction from a dilute disodium phosphate extract of frozen, macerated, infected plants with ammonium sulfate, and the removal of most of the remaining color...

Chemical Studies on Plants of Cirsium Arvense Species

Control of Bipolaris Oryzae the Causal Agent of Rice Brown Spot Disease Via Soil Streptomyces Sp. Isolate G

Bipolaris oryzae causes rice brown spot disease which reduces rice yield with substantial global impact. Streptomycetes isolated from rice fields of Guilan Province, Iran, showed antifungal activity against the tested pathogen. From five active Streptomyces spp. isolates, isolate G showed high antagonistic activity. To determine its taxonomical identity, its colonies character...

Purification of Host- Specific Toxin from Iranian Isolates of Alternaria alternata, Causal Agent of Brown Spot Disease of Tangerine

Brown spot disease caused by Alternaria alternata (Fr.: Fr.) Keissl is a serious problem forproduction of tangerines and tangerine hybrids in Iran. The Tangerine pathotype causes brownspot disease on young leaves and immature fruits of limited varieties of mandarins and tangerines(Citrus. reticulata Blanco). Specificity in the interaction between tangerine and the pathogen isdetermined by a hos...