The abundance and inherent potential for extensive allelic variations in simple sequence repeats (SSRs) or microsatellites resulted in valuable source for genetic markers in eukaryotes. In this study, we analyzed and compared the abundance and organisation of SSR in the genome of two important fungal pathogens of wheat, brown or leaf rust (Puccinia triticina) and black or stem rust (Puccinia gr...

Background Puccinia psidii causes rust disease on many host species in the Myrtaceae [1]. First reported in 1884 on guava in Southern Brazil [2], the rust has since been detected on several myrtaceous in South America, Central America, Caribbean, Mexico, USA: in Florida, California, and Hawaii. More recently, P. psidii was reported in Japan infecting M. polymorpha[3]. Of special note is that a ...

For a long time, the appearance of the fall colours has been associated with the enigmatic chlorophyll breakdown in higher plants. However, the extensive earlier search for coloured chlorophyll breakdown products has remained unsuccessful. When chlorophyll catabolites from higher plants were first tentatively identified, they were indicated to be colourless. These colourless compounds readily d...

a study was conducted to assess the durable resistance in a near isogenic line of spring wheat (triticum aestivalis l.), possessing resistance gene yr-18 to some isolates (race specific resistance) of stripe rust (puccinia striiformis f. sp. tritici), namely thatcher yr-18 and durable resistance of an cultivar of spring wheat to all isolates of stripe rust (race non- specific resistance), namel...

Lentil, as an economical source of protein, minerals and vitamins, plays important role in nutritional security of the common man. Grown mainly in West Asia, North Africa (WANA) region and South Asia, it suffers from several biotic stresses such as wilt, rust, blight and broomrape. Lentil rust caused by autoecious fungus Uromyces viciae fabae (Pers.) Schroet is a serious lentil disease in Alger...

Beta-glucan (BG) is one of the most abundant forms of polysaccharides with the heterogeneous groups of glucose polymers connected by a 1→3 linear β-glycosidic chain hub. BG is unique depending on length and structure of the branches. Even though BG has highly variable branches, 1→4 or 1→6 glycosidic chains are the major branching group (Chan et al., 2009). BG is present everywhere from bacteria...

The allelopathic potential of methanol extract from Sargassum virgatum (Mert.) AG. (Phaeophyta) on the seeds germination and seedlings growth of Lettuce (lactuca sativa), Tomato (Lycopersicon esculentum), and barley (Hordeum vulgare) was conducted. Methanol extracts from S. virgatum at concentrations 25, 50, 100, and 200 ppm were applied under laboratory conditions. Tomato, lettuce and barley g...

Climate change can cause significant shifts in the occurrence and severity of agricultural diseases, altering distribution phytosanitary problems with severe economic, social, environmental consequences. Despite their importance, these new geographic temporal distributions plant diseases still demand scrutiny. In present study, we prospect sugarcane brown rust (Puccinia melanocephala) consideri...

Eight cyperaceous Puccinia and Uromyces, viz. P. cariciola, P. conclusa, P. cyperi, P. eriophori, P. scirpi and Uromyces lineolatus subsp. lineolalus are reported as new to Iran. The uredinial stage of P. dioicae is reported as a new stage for this rust in Iran. Hosts new to P. eriophori are also given. Included is a key to the cyperaceous rust species in Iran.

A total of 43 isolates of the wheat leaf rust fungus, Puccinia triticina Eriks, collected from Ethiopia and Germany were analysed for their genetic diversity using the amplified fragment length polymorphism (AFLP) technique. Out of 18 EcoRI/MseI primer combinations screened, 15 produced 219 highly polymorphic fragments. The average AFLP difference between pairs of the leaf rust isolates (26 fro...