Results 171 to 180 of about 4,857 (210)

Physiological Specialisation of Hemileia vastatrix B. and Br [PDF]

Nature, 1932
IN the course of some recent work on the behaviour of a number of hybrids and selections of Coffea arabica Linn., collected at the Mysore Government Coffee Experiment Station, towards infection by Hemileia vastatrix B. and Br., indications of the existence of physiological specialisation in this rust fungus have been obtained.
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Appressorium formation by Hemileia vastatrix

Mycological Research, 1993
At germination, germ tubes extrude through germ pores of the urediniospore wall of Hemileia vastatrix . As many as five germ tubes can be formed from a single urediniospore, but only one elongates and extends randomly over the epidermis. Exploratory branches form along its length. Upon reaching the raised lips of the subsidiary cells of coffee leaves,
T.A. Coutinho, F.H.J. Rijkenberg, M.A.J. Van Asch   +2 more
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Polysaccharides from Hemileia vastatrix uredospores

Experimental Mycology, 1983
Abstract The polysaccharidic fractions isolated from Hemileia vastatrix uredospores by alkali treatment, expressed as a percentage of the initial uredospore weight, gave the following yields: 1 M NaOH soluble at 22°C (7.1); 1 M NaOH soluble at 60°C (5.0); and insoluble residue (7.6).
J.Antonio Leal, Begoña Gomez-Miranda, Pilar Ruperez   +2 more
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Abnormal development of uredia in Hemileia vastatrix

Transactions of the British Mycological Society, 1965
In Hemileia vastatrix Berk. & Br. the only type of uredium so far known is typically superstomal. Rare occurrences of subepidermal uredia and sori developed inside the intercellular spaces of the spongy parenchyma, intermingled with the typical hypophyllous, superstomal sori are described.
R.B. Rajendran, K.V. George
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Identification of a new race of Hemileia vastatrix in Brazil

Australasian Plant Disease Notes, 2009
In this study, a survey of physiological races of Hemileia vastatrix was carried out on 34 coffee leaf rust populations collected at several coffee genotypes in Brazil. After the inoculation on leaf disc of coffee differential clones, the races I, II, III, XIII, XVII and XXXVII were characterised.
P. G. C. Cabral, E. M. Zambolim, L. Zambolim, T. P. Lelis, A. S. Capucho, E. T. Caixeta   +5 more
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Sensitization to the fungus Hemileia vastatrix (coffee leaf rust)

Allergy, 2001
Background: The aim of the present study was to determine the existence of sensitization to the fungus Hemileia vastatrix (coffee leaf rust) in a sample of the Brazilian population. This fungus attacks coffee plantations, and in some regions of Brazil the concentration of its spores in the air can be very high.
M A, Croce , E R, da Costa Manso, W, Gambale, L, Takayama, C E, Oliveira Andrade, J H, Pereira Pinto, F F, Morato Castro, J, Croce   +7 more
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Hemileia vastatrix HvCat Genome sequencing

2013
Coffee rust Genome sequencing. Isolate of coffee rust taken from Coffea arabica var. Carurra leaves.
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A New type of Nuclear Life Cycle in Hemileia Vastatrix

Mycologia, 1967
Hemileia vastatrix1 is the cause of rust disease of coffee, and there have been many investigations of its life cycle. This rust is characterized by the formation of non-resting teliospores which germinate in situ and produce sporidia, which, however, are unable to reinfect coffee, which suggests that they are non-functional2–4.
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Genetic diversity in Hemileia vastatrix based on RAPD markers

Mycologia, 2005
Random amplified polymorphic DNA (RAPD) was used to assess the genetic structure of Hemileia vastatrix populations. Forty-five rust isolates with different virulence spectra and from different hosts and geographical regions were analyzed. Out of 45 bands, generated with three RAPD primers, 35 (78%) were polymorphic and scored as molecular markers ...
Gouveia, M. Manuela C., Ribeiro, Ana, Várzea, Vítor M. P., Rodrigues Jr., Carlos J.   +3 more
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Dispersal of Coffee Rust Hemileia vastatrix B. et Br. [PDF]

Nature, 1962
RAYNER1 has recently stated that uredospores of Hemileia vastatrix can be dislodged from pustules by sudden mechanical shock. In this he is in agreement with Nutman, Roberts, and Bock2, and with Bock3.
F. J. NUTMAN, F. M. ROBERTS
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