Viability of Vacuum-Dried Urediniospores of Melampsora lini Maintained over Three Decades

Mycologia ◽  
1985 ◽  
Vol 77 (3) ◽  
pp. 491
Author(s):  
Thomas J. Gulya ◽  
Larry J. Littlefield
Keyword(s):  
Melampsora Lini

Ultrastructure and development of urediospore ornamentation in Melampsora lini

1971 ◽  
Vol 49 (12) ◽  
pp. 2067-2073 ◽  
Author(s):  
L. J. Littlefield ◽  
C. E. Bracker
Keyword(s):  
Endoplasmic Reticulum ◽  
Plasma Membrane ◽  
Outer Surface ◽  
Spore Wall ◽  
Wall Material ◽  
Wild Type ◽  
Melampsora Lini ◽  
Inner Surface ◽  
External Position ◽  
Basal Portion

The urediospores of Melampsora lini (Ehrenb.) Lev. are echinulate, with spines ca. 1 μ long over their surface. The spines are electron-transparent, conical projections, with their basal portion embedded in the electron-dense spore wall. The entire spore, including the spines, is covered by a wrinkled pellicle ca. 150–200 Å thick. The spore wall consists of three recognizable layers in addition to the pellicle. Spines form initially as small deposits at the inner surface of the spore wall adjacent to the plasma membrane. Endoplasmic reticulum occurs close to the plasma membrane in localized areas near the base of spines. During development, the spore wall thickens, and the spines increase in size. Centripetal growth of the wall encases the spines in the wall material. The spines progressively assume a more external position in the spore wall and finally reside at the outer surface of the wall. A mutant strain with finely verrucose spores was compared to the wild type. The warts on the surface of the mutant spores are rounded, electron-dense structures ca. 0.2–0.4 μ high, in contrast to spines of the wild type. Their initiation near the inner surface of the spore wall and their eventual placement on the outer surface of the spore are similar to that of spines. The wall is thinner in mutant spores than in wild-type spores.

Colony initiation in flax rust in axenic culture: involvement of a volatile factor

1979 ◽  
Vol 57 (23) ◽  
pp. 2657-2662 ◽  
Author(s):  
Rosalinda Boasson ◽  
Michael Shaw
Keyword(s):  
Carbon Dioxide ◽  
Axenic Culture ◽  
Conclusive Evidence ◽  
Culture Flask ◽  
Melampsora Lini ◽  
Air Space ◽  
Lag Period ◽  
Axenic Cultures ◽  
Incubation Temperatures

In axenic cultures of flax rust (Melampsora lini) colonies are initiated after a lag period of 12–20 days, depending partly on incubation temperatures. Colony initiation is completely inhibited by removal of a volatile factor which is absorbed by KOH in the air space of the culture flask. The fungus remains sensitive to this inhibition for 8–10 days, i.e., until shortly before visible colonies would normally have developed. While in the presence of KOH, the fungus is not killed; cultures grow normally after removal of the KOH.Although conclusive evidence must await further work, the available data strongly suggest that carbon dioxide is responsible for this effect.

CDC Bethune flax

2002 ◽  
Vol 82 (1) ◽  
pp. 101-102 ◽  
Author(s):  
G. G. Rowland ◽  
Y. A. Hormis ◽  
K. Y. Rashid
Keyword(s):  
Linum Usitatissimum ◽  
Oil Content ◽  
Oil Quality ◽  
High Yield ◽  
Lodging Resistance ◽  
Linum Usitatissimum L ◽  
Melampsora Lini ◽  
Crop Development ◽  
Cultivar Description ◽  
Moderately Resistant

CDC Bethune, is a medium-late-maturing oilseed flax (Linum usitatissimum L.) developed by Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. This cultivar has medium oil content, medium oil quality, medium seed size, good lodging resistance and high yield when seeded early in the Black and the Brown Soil zones of the prairies. It is immune to North American races of rust caused by Melampsora lini and moderately resistant to wilt caused by Fusarium oxysporum f. sp. lini. Key words: Flax, oilseed, Linum usitatissimum L., cultivar description

Erratum: Histological studies of Melampsora lini resistance in flax

1970 ◽  
Vol 48 (6) ◽  
pp. 1136-1136 ◽  
Author(s):  
Larry J. Littlefield ◽  
Sandra J. Aronson
Keyword(s):  
Histological Studies ◽  
Melampsora Lini

not available

Melampsora lini. [Distribution map].

1991 ◽  
Author(s):  
Keyword(s):  
New York ◽  
South Dakota ◽  
Prince Edward Island ◽  
New South ◽  
Eastern Siberia ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
Melampsora Lini ◽  
South Wales ◽  
New Distribution

Abstract A new distribution map is provided for Melampsora lini (Ehrenb.) Lev. Hosts: Flax (Linum usitatissimum) & other Linum spp. Information is given on the geographical distribution in Africa, Canary Islands, Egypt, Ethiopia, Kenya, Libya, Madeira, Morocco, South Africa, Zaire, Asia, Afghanistan, Bangladesh, China, India, Iran, Iraq, Israel, Japan, Korea, Nepal, Pakistan, Turkey, Altai and Sayang Mountains, Eastern Siberia, Kirgizia, Turkestan, Kazakhstan, Asutralasia & Oceania, Australia, New South Wales, Queensland, South Asutralia, Victoria, Western Australia, Tasmania, New Zealand, Europe, Austria, Belgium, Bulgaria, Crete, Cyprus, Czechoslovakia, Denmark, Finland, France, Corsica, Germany, Greece, Hungary, Irish Republic, Italy, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, UK, Britain, Northern Ireland, England, Wales, USSR, Estonia, Latvia, Lithuania, Karsk, Moscow, Novorogod, Pskov, Smolensk, Vitebsk, Yugoslavia, North America, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Ontario, Prince Edward Island, Saskatchewan, Quebec, Yukon, USA, Canlifornia, Idaho, Iowa, Montana, Nebraska, New York, North Dakota, Oklahoma, Oregon, South Dakota, Washington, Wisconsin, Wyoming, South America, Argentina, Bolivia, Brazil, Parana, Rio Grande do Sul, Sao Paulo, Chile, Peru, Uruguay.

Melampsora lini. [Descriptions of Fungi and Bacteria].

1965 ◽  
Author(s):  
G. F. Laundon
Keyword(s):  
Geographical Distribution ◽  
Growing Season ◽  
Common Source ◽  
Linum Usitatissimum L ◽  
Light Yellow ◽  
Melampsora Lini ◽  
Orange Yellow ◽  
Sources Of Infection ◽  
North And South America ◽  
North And South

Abstract A description is provided for Melampsora lini. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Linum usitatissimum, L. catharticum and other species of Linum. The American Aecidium lini Dearness & House on L. virginianum differs from M. lini in having cupulate, not caeomoid, aecia. DISEASE: Flax rust. Characterized by light-yellow to orange-yellow sori containing pycnia and aecia on leaves and stems early in the growing season, followed by reddish-yellow uredia on leaves, stems and capsules during the growing season, and later, brown to black telia covered by the epidermis, chiefly on the stems. Causes serious damage to flax by weakening and disfiguring the fibres and reduces the quality and yield of linseed. GEOGRAPHICAL DISTRIBUTION: Africa, Asia, Australasia, Europe, North and South America. (CMI Map 68, 2nd Ed.) TRANSMISSION: Sporidia produced in the spring from teliospores over-wintering on crop refuse are the most common source of primary inoculum. Teliospores may also be carried on fragments of infected host tissue with the seed. Volunteer flax plants, including some wild species, may also serve as important sources of infection (Millikan, 1951), and provide a means of over-wintering of the uredial stage in New Zeland (32: 79).

Continuity of Host Plasma Membrane Around Haustoria of Melampsora Lini

Mycologia ◽  
1970 ◽  
Vol 62 (3) ◽  
pp. 609-614 ◽  
Author(s):  
Larry J. Littlefield ◽  
Charles E. Bracker
Keyword(s):  
Plasma Membrane ◽  
Melampsora Lini ◽  
Host Plasma Membrane
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