Effects of Pregermination Environments on the Germinability of Uredospores of Two Wheat Rust Fungi

1974 ◽  
Vol 64 (9) ◽  
pp. 1244 ◽  
Author(s):  
P. N. Sood
Keyword(s):  
Rust Fungi ◽  
Wheat Rust

Increased Lipoxygenase Activity is Involved in the Hypersensitive Response of Wheat Leaf Cells Infected with A virulent Rust Fungi or Treated with Fungal Elicitor

1986 ◽  
Vol 41 (5-6) ◽  
pp. 559-563 ◽  
Author(s):  
Carlos A. Ocampo ◽  
Bruno Moerschbacher ◽  
Hans J. Grambow
Keyword(s):  
Hypersensitive Response ◽  
Hypersensitive Reaction ◽  
Rust Fungi ◽  
Lipoxygenase Activity ◽  
Puccinia Graminis ◽  
Compatible Interaction ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Germ Tubes ◽  
Wheat Rust

The hypersensitive reaction in incompatible wheat-rust interactions is characterized by an increase in lipoxygenase activity detectable as early as 28 h after penetration of the pathogen. In contrast, lipoxygenase activity in the compatible interaction did not increase until the onset of sporulation.Lipoxygenase activity also increased following treatment of wheat leaves with an elicitor fraction from germ tubes of Puccinia graminis tritici.

scholarly journals William Pollock Fraser (1867-1943) : Canadian pioneer plant pathologist-mycologist

2005 ◽  
Vol 73 (2) ◽  
pp. 53-59
Author(s):  
R.H. Estey
Keyword(s):  
Plant Pathology ◽  
Nova Scotia ◽  
Rust Fungi ◽  
Western Canada ◽  
Forest Pathology ◽  
Pathology Laboratory ◽  
Pioneer Plant ◽  
Mcgill University ◽  
The University ◽  
Wheat Rust

William P. Fraser, the first Canadian-born plant pathologist-mycologist to be internationally recognized as such, began as an amateur collector of fungi, with emphasis on the plant rusts, while teaching school in his home province, Nova Scotia. He then became a widely acclaimed authority on the rusts and a professional plant pathologist-mycologist. He taught plant pathology and mycology, first at McGill University and then, after an interval as head of the first plant pathology laboratory in Western Canada, at the University of Saskatchewan. Fraser was a Canadian pioneer in research on physiological races of wheat rust; in the culture of heteroecious rust fungi, in forest pathology, and in the study of root and smut diseases of grasses in Western Canada.

CHAPTER 4: Emergence and Spread of New Races of Wheat Rust Fungi: Continued Threat to Food Security and Prospects of Genetic Control

2020 ◽  
pp. 53-79
Author(s):  
Yue Jin ◽  
James Kolmer ◽  
Les Szabo ◽  
Matthew N. Rouse ◽  
Mogens S. Hovmøller ◽  
...  
Keyword(s):  
Food Security ◽  
Genetic Control ◽  
Rust Fungi ◽  
New Races ◽  
Wheat Rust

Advances in understanding the biology and epidemiology of rust diseases of cereals

2021 ◽  
pp. 15-38
Author(s):  
Vanessa Bueno-Sancho ◽  
◽  
Clare M. Lewis ◽  
Diane G. O. Saunders ◽  
◽  
...  
Keyword(s):  
Disease Surveillance ◽  
Crop Production ◽  
Puccinia Striiformis ◽  
Management Strategies ◽  
Puccinia Triticina ◽  
Rust Fungi ◽  
Biological Knowledge ◽  
Parasitic Fungi ◽  
Rust Diseases ◽  
Wheat Rust

Rust fungi (order: Pucciniales) constitute the largest group of plant parasitic fungi and include many species of agricultural importance. This includes the three wheat rust fungi (Puccinia graminis f. sp. tritici, Puccinia striiformis f. sp. tritici and Puccinia triticina) that have posed a threat to crop production throughout history. This chapter provides an overview of the wheat rust pathogen lifecycle that has been critical to the design of effective disease management strategies and discusses recent integration of basic biological knowledge and genomic-led tools within an epidemiological framework. Furthermore, we include a case study on the “field pathogenomics” technique, illustrating the value of genomic-based tools in disease surveillance activities. Bringing together advances in understanding basic pathogen biology, developments in modelling for disease forecasting and identification, alongside genomic-led advances in surveillance and resistance gene cloning, holds great promise for curtailing the threat of these notorious pathogens.

Euphysothrips: an Old World genus of Thripidae (Thysanoptera) associated with rust fungi (Pucciniales)

Zootaxa ◽  
2018 ◽  
Vol 4532 (3) ◽  
pp. 447 ◽  
Author(s):  
LAURENCE A. MOUND
Keyword(s):  
Rust Fungus ◽  
Rust Fungi ◽  
New Genus And Species ◽  
Hemileia Vastatrix ◽  
History Museum ◽  
The Family ◽  
Timor Leste ◽  
Coffee Plants ◽  
The Common ◽  
Wheat Rust

Fungus-feeding is common amongst members of the family Phlaeothripidae that live on dead branches and leaves (Dang et al. 2014). In contrast, associations with fungi are rare amongst the common thrips of the family Thripidae that live in flowers and on leaves. In this family, two species from Africa in the genus Craspedothrips are reported to be associated with the rust fungus, Hemileia vastatrix, on the leaves of coffee plants (Mound et al. 2012), although there are no reports of direct feeding by the thrips on the fungus. However, the two known species of the Asian genus Euphysothrips have been observed to feed on the spores of rust fungi at widely separated localities. One of these, fungivora, was described by Ramakrishna (1928) in the genus Anaphothrips, and he reported this thrips as feeding on “rust” on wheat plants at Coimbatore, India. Ananthakrishnan (1969: 5) subsequently referred to this species as “feeding on the spores of wheat rust, Puccinia graminis”. The second species of Euphysothrips was described by Ramakrishna and Margabandhu (1939) as a new genus and species, Megaphysothrips subramanii, from Mysore in southern India. These authors stated that this thrips was found feeding on coffee rust, and a similar feeding association on coffee was reported from Timor in 1967, when specimens of subramanii were submitted for identification to the Natural History Museum, London. In Timor Leste during August 2018, adults and larvae of subramanii were found commonly on the leaves of coffee plants. The thrips were living only on the reddish-pink patches of Hemileia vastatrix fungus (Fig. 6), and not freely exploring the rest of the leaf surface. Both adults and larvae were difficult to see on these patches of fungus, because each individual was noted to carry a covering of coloured spores. This pinkish covering was shed only when an individual was disturbed by attempts to collect them with a small brush. There was no evidence of feeding damage to the coffee leaves by the thrips, and it appears that subramanii is probably dependent on the rust fungus for its nourishment. 

Actual state of the rust fungi systematics in the world.

1995 ◽  
Vol 48 (3) ◽  
pp. 221-224
Author(s):  
Zdeněk Urban
Keyword(s):  
Rust Fungi ◽  
Actual State ◽  
The World

NEW RECORDS OF RUST FUNGI OF TREES AND SHRUBS FROM UZBEKISTAN

2018 ◽  
pp. 19-21
Author(s):  
I. M. Mustafaev ◽  
M. M. Iminova ◽  
J. P. Sherkulova ◽  
T. N. Xolmurodova ◽  
S. A. Teshaboeva
Keyword(s):  
New Records ◽  
Rust Fungi ◽  
Trees And Shrubs

SCREENING OF WHEAT LR-GENES FOR RESISTANCE TO PUCCINIA TRITICINA IN THE NORTH CAUCASUS REGION CONDITIONS

1970 ◽  
pp. 54-56
Author(s):  
G. V. Volkova ◽  
O. A. Kudinova ◽  
O. F. Vaganova
Keyword(s):  
Winter Wheat ◽  
Leaf Rust ◽  
Puccinia Triticina ◽  
North Caucasus ◽  
Breeding Programs ◽  
Lr Genes ◽  
Caucasus Region ◽  
Highly Efficient ◽  
The North ◽  
Wheat Rust

Currently, more than 70 wheat rust resistance genes are known, but few of them are effective. The purpose of this work is to screen lines of Lr gene carriers for resistance to leaf rust under conditions of the North Caucasus region. Investigations were carried out in 2016-2018 at the infectious site of VNIIBZR. Research material was 49 near isogenic lines of winter wheat cultivar Thatcher. Infectious material was the combined populations of P. triticina, obtained as a result of route surveys of industrial and breeding crops of winter wheat in the areas of the Krasnodar, Stavropol Territories and the Rostov Region, conducted in 2016-2018. According to the assessment, the genes are ranked as follows: - highly efficient genes (plants with no signs of damage): Lr9, Lr42, Lr43 + 24 and Lr50; effective (1R-5R) Lr genes: 19, 24, 29, 36, 37, 38, 45, 47; moderately effective (10MR-20MR) Lr genes: 17, 18, 21, 22a, 28, 32, 41, 52. The remaining Lr-lines were susceptible to P. triticina (25 MR - 90S) to varying degrees. Highly efficient and effective genes Lr9, Lr19, Lr24, Lr29, Lr38, Lr42, Lr43 + 24, Lr47 and Lr50 showed resistance in the seedling phase and can be recommended for inclusion in breeding programs to protect wheat from leaf rust in different phases of plant ontogenesis in the North Caucasus region.

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