Most Alternaria spp. are considered asexual but recent molecular evolution analyses of Alternaria mating-type genes show that the mating locus is under strong purifying selection, indicating a possible role in sexual reproduction. The objective of this study was to determine the mode of reproduction of an Alternaria alternata sensu lato population causing citrus brown spot in central Florida. M...

Plants and animals rely on immune receptors, known as nucleotide-binding domain and leucine-rich repeat (NLR)-containing proteins, to defend against invading pathogens and activate immune responses. How NLR receptors respond to pathogens is inadequately understood. We previously reported single-residue mutations that expand the response of the potato immune receptor R3a to AVR3a(EM), a stealthy...

BACKGROUND Alternaria alternata is a risk factor for developing asthma.Alt a 1, which has been described as the major allergen in A alternata, shows a good correlation with A alternata spores only when they have germinated. OBJECTIVES The objective of this study was to determine the correlation between spore counts and clinical symptoms in patients with allergic asthma and/or rhinitis monosen...

A new species of Ulocladium was isolated from diseased leaves from two Cucumis sp. growing in Sinkiang and Gansu provinces of China. Conidia were isolated from necrotic leaves and used to establish single-spore pure cultures. Conidia were harvested from cultures 7 d after incubation for morphological comparisons. The morphology of this species resembles that of U. botrytis and U. consortiale. H...

Eco-friendly management of fruit rot of chilli was carried out with the objectives to ascertain the causal pathogens associated with the disease and to evaluate resistant sources against the pathogens. The disease samples of chilli fruits collected from different locations revealed that three isolates of Colletotrichum capsici, one isolate each of Fusarium moniliforme. F. pallidoroseum, F. oxys...

Alternaria leaf spot of broccoli caused by alternata in Bangladesh | Sayma T. Nira, Md. Farhad Hossain, Nur Uddin Mahmud, Oliul Hassan, Tofazzal Islam, Abdul M. Akanda Agricultural Journals

The principles of good agricultural and horticultural practice, considering both environmental protection high yielding plants, require modern cultivation methods. In agriculture, it is possible to use biostimulants that protect the soil against degradation plants phytopathogens stress. purpose 3-year field laboratory studies was determine effect Trichoderma harzianum T-22 other on health statu...

The antimicrobial activity of all stereoisomers of morinols A and B was tested. All stereoisomers of morinols A and B showed antifungal activity against Alternaria alternata, especially (-)-morinol B which showed the strongest activity. The natural component, (+)-morinol A, and unnatural stereoisomer, (7S,7'S,8R,8'R)-morinol B, showed antibacterial activity against the gram-positive bacteria, B...

The fatty acid synthase inhibitor cerulenin (50 to 100 micrograms/ml) inhibited production of the polyketide mycotoxins alternariol (AOH) and alternariol monomethyl ether (AME) by the mold Alternaria alternata. The results suggested that AOH synthesis was inhibited by a direct mechanism by cerulenin, whereas production of AME was probably limited by a shortage of the precursor AOH.