+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Ultrastructural studies of pathogenesis and uredinial development of melampsora larici populina and melampsora medusae on poplar and melampsora coleosporioides and melampsora epitea on willow



Ultrastructural studies of pathogenesis and uredinial development of melampsora larici populina and melampsora medusae on poplar and melampsora coleosporioides and melampsora epitea on willow



New Zealand Journal of Botany 23(1): 117-134



Light, transmission and scanning electron microscopy were used to study pathogenesis and uredinial development of M. larici-populina, M. medusae, M. coleosporioides and M. epitea. Pathogenesis and uredinial development in each of the 4 Melampsora spp. were similar. Hyphae ramified intercellularly throughout leaf tissue and haustoria were formed from mother cells which adhered closely to cell walls. Penetration pegs invaginated the host cell plasma membrane and extensive wall deposits formed occasionally. The haustorial neck was bridged with a dark-staining band located mid-way along the neck. The wall of the haustorial body was bilayered and its cytoplasm was identical with that of intercellular hyphae. Haustoria in invaded cells were surrounded with ribosome-studded endoplasmic reticulum. Uredinia developed from a layer of subepidermal initial cells which divided twice (sometimes 3 times) across the vertical axis to form 3 cells viz., a proximal peridial cell, a central intercalary cell, and a distal sporogenous cell. Intercalary cells formed electron-lucent inclusion bodies before disintegrating. Spore buds from sporogenous cells extended into positions formerly occupied by intercalary cells forming urediniospore initials. These initials divided unequally forming an immature urediniospore and a smaller pedicel cell. The urediniospore expanded and developed thickened echinulate walls. Successive urediniospores arose sympodially. Clavate, smooth-walled paraphyses were abundant in uredinia. These arose from cells in the base of the uredinium and like peridial cells were formed only with the 1st generation of urediniospores. When ruptured the epidermis peeled back to reveal an intact lining of moribund peridial cells.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 006859992

Download citation: RISBibTeXText


Related references

Ultrastructural studies of infection mechanism of Rhizobium strain 6050 in groundnut mutants. Indian Journal of Experimental Biology 23(7): 387-392, 1985

Ultrastructural studies of hepatocyte cytoskeletons of phalloidin treated rats by quick freezing and deep etching method. Hepatology 13(2): 222-229, 1991

Some establishment characteristics of mouse-ear and king devil hawkweeds. New Zealand Journal of Botany 23(1): 91-100, 1985

Ultrastructural studies of the skin and cultured fibroblasts in i cell disease. Journal of Cutaneous Pathology 14(5): 309-317, 1987

Development and characterization of microsatellite markers for the fungus Ceratocystis fimbriata. Molecular Ecology Notes 4(2): 215-218, 2004

Penetration and infection of leaves of black walnut juglans nigra by marssonina juglandis and resulting lesion development. Phytopathology 73(3): 494-497, 1983

Introduction of the plasmid pkm 101 associated muc genes into saccharomyces cerevisiae. Mutation Research 131(5-6): 197-204, 1984

Susceptibility to rubella in a pregnant population after the introduction of vaccination. Journal of Clinical Pathology 33(1): 24-27, 1980

Between-site and -year variation in the relative susceptibility of native Scottish Pinus sylvestris populations to dothistroma needle blight. Plant Pathology 65(3): 369-379, 2016

Effects of light temperature and nitrogen treatments upon the fatty acid composition of galacto lipids of young and older leaves from winter rape plants brassica napus var oleifera cultivar quinta. Physiologia Plantarum 52(1): 1-6, 1981

Different resistance of six clones of aigeiros poplars to Marssonina populi. Journal of Nanjing Forestry University (1): 35-41, 1987

Mel B toxicity in human trypanosomiasis in the Gboko endemic area of Nigeria. Acta Tropica 33(1): 96-100, 1976

Recent studies of the enzymic synthesis of ricinoleic Acid by developing castor beans. Plant Physiology 67(4): 672-676, 1981

Susceptibility to root-knot nematodes in cotton lines resistant to the fusarium wilt. Crop science 26(3): 543-546, 1986

Comparative studies of stability of native and recombinant horseradish peroxidase inactivated by radiation and other factors. Russian Chemical Bulletin 43(12): 2110-2113, 1994