The ultrastructure of the interface between susceptible, partially resistant spring wheat genotypes and wheat leaf rust
1993
Jacobs, T. | Hee, F.P. van (Wageningen Agricultural Univ. (Netherlands). Dept. of Plant Breeding) | Engels, F.M.
The ultrastructure of host cell wall appositions was studied in the highly susceptible genotype Morocco and in the partially resistant genotype Akabozu shortly after inoculation with wheat leaf rust. The ultrastructure of the haustorium and the host cell of Morocco, Akabozu and another partially resistant genotype Westphal 12A was studied just before sporulation. The cell wall appositions in Morocco and Akabozu were narrow and long. The majority of cell wall appositions of Morocco consisted of a layer of dark entities. The majority of cell wall appositions in Akabozu consisted of a fibrillar network. Just before sporulation no differences could be detected in extrahaustorial membrane, matrix or haustorial wall between the susceptible and partially resistant genotypes. No collars were observed around the haustorial neck. The cell contents in the highly susceptible Morocco appeared degenerated as if the cells were empty. In the partially resistant genotypes the amount of cytoplasm was higher and the condition of chloroplasts was better.
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