Two rust fungi from Iran are described as new species, viz. Puccinia hedjaroudei on Scutellaria multicaulis (Lamiaceae) and Phragmidium gorganense on Rubus caesius (Rosaceae). A key to the species of Phragmidium on Rubus spp. in Iran is also provided. All holotypes are preserved in the fungus reference collection of the Ministry of Jihad-e Agriculture (IRAN), located in Department of Botany of ...

Introduction Rust diseases of wheat are among the oldest plant diseases known to humans. Early literature on wheat cultivation mentions these devastating diseases and their ability to destroy entire wheat crops. Since rust discovery, numerous studies have been conducted on the life cycles of rust pathogens and their management. The information gained from these studies has enabled us to develop...

Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most devastating diseases of wheat in China. Rapid change to virulence following release of resistant cultivars necessitates ongoing discovery and exploitation of new resistance resources. Considerable effort has been directed at non-host resistance (NHR) which is believed to be durable. In the present study w...

In the rust fungus Uromyces fabae, the transition from the early stages of host plant invasion toward parasitic growth is accompanied by the activation of many genes (PIGs = in planta induced genes). Two of them, PIG1 (= THI1) and PIG4 (= THI2), were found to be highly transcribed in haustoria, and are homologous to genes involved in thiamine (vitamin B1) biosynthesis in yeast. Their functional...

The barley leaf rust fungus forms appressoria over host leaf stomata and penetrates via the stomatal pore. High levels of avoidance to leaf rust fungi have been described in some wild accessions of Hordeum species where a prominent wax layer on the stomata inhibits triggering of fungal appressorium differentiation. Leaf rust avoidance has not yet been found in H. vulgare. Since cuticular leaf w...

Wheat leaf rust, caused by the basidiomycete Puccinia triticina, can cause yield losses of up to 20% in wheat producing regions. During infection, the fungus forms haustoria that secrete proteins into the plant cell and effect changes in plant transcription, metabolism, and defense. It is hypothesized that new races emerge as a result of overcoming plant resistance via changes in the secreted e...

Surveys were carried out in garlic cultivation areas of Gaziantep province April 2018 and 2019 to determine the prevalence fungal diseases garlic. After isolation process was conducted according routine mycological methods, fungi identified their cultural morphological characteristics. Fungi belonging genera Fusarium, Rhizoctonia, Macrophomina Puccinia determined production areas. The most prev...

Detecting the presence and amount of a fungus in leaf tissue, especially when it is suspected that other fungi are presen~, is quite difficult. Culture methods can be unreliable because a few spores of a fast growing fungus may overgrow other fungi within a, few days (e.g. McKENZIE and HUDSON 1976). Methods which measure the chitin content of fungal walls cannot differentiate between fungi; in ...