Microscopical Studies on the Cortex and Medullary Rays of Brassica campestris var. rapa infected with Plasmodiophora brassicae

Dekhuijzen, H. M.

doi:10.1111/j.1439-0434.1976.tb01732.x

Cited by 14 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is possible that the tubules within the parasitical body are linked to the protrusions. These observations together with those published in a previous paper (Dekhuijzen, 1976) suggest the presence of amoeboid structures penetrating the cortical cells. Much attention was therefore paid to the cortical cell walls and indeed frequently large openings of about 3 gm were found in the walls (Fig.…”

Section: Fig 3 Een Aantal Cellen Van De Cortex Van De Vatbare Variksupporting

confidence: 78%

“…3). The size of the irregularly shaped parasitical material ranges from 1-5 ktm which is smaller than the smallest spherical shaped secondary plasmodia (5-30 p.m) (Dekhuijzen, 1975(Dekhuijzen, , 1976. Definite proof is lacking but the presence of amoeboid material and of perforations in the cortical cell wall (Fig.…”

Section: Discussionmentioning

confidence: 96%

“…Although nuclei have been sectioned only in a few cases it is remarkable that the parasitical material contains only one nucleus, whereas the secondary plasmodia are multinucleate (Fig. 6 and Dekhuijzen, 1976 - Fig. 3).…”

Section: Discussionmentioning

confidence: 97%

“…1 shows parasitical material within a host vacuole of a cortical cell i0 days after inoculation. Particularly striking is the presence of lipid droplets which is characteristic of this fungus (Dekhuijzen, 1976). The number of droplets is, however, much smaller than those at the plasmodial phase of the life cycle (see Fig.…”

Section: The Infected Cortex Of the Susceptible Varietymentioning

confidence: 97%

“…Electron micrographs showed the presence of perforations in the cortical cells indicating that the fungus migrates through the cortical host cells before reaching the medullary rays (Dekhuijzen, 1976). …”

Section: Introductionmentioning

confidence: 97%

See 4 more Smart Citations

Electron microscopic studies on the root hairs and cortex of a susceptible and a resistant variety of Brassica campestris infected with Plasmodiophora brassicae

Dekhuijzen¹

1979

Netherlands Journal of Plant Pathology

Self Cite

View full text Add to dashboard Cite

The cortex of the roots of a susceptible and a resistant variety of Brassica campestris var. rapa infected with sterile resting spores of Plasmodiophora brassicae from senescent callus was studied at a stage prior to disease symptom development. Electron micrographs show the presence of amoeboid structures within the cortical cells of the susceptible variety 10 days after inoculation. Cell wall perforations, hypertrophied host cell nuclei, nucleoli and broken tonoplasts were frequently found in the susceptible variety. It has been concluded that amoeboid structures of the parasite penetrate the cell wall and disrupt the cortical cells.Electron micrographs of the resistant variety show the presence of zoosporangia with secondary zoospores in the root hairs nine days after inoculation. Two to four days later a large number of dead host cells can be observed in the outer cortical layer of the resistant variety, whereas no apparent changes are found in the inner cortex. The results suggest the occurrence of a hypersensitive host reaction which terminates further growth ofPlasmodiophora brassicae.

show abstract

Section: Fig 3 Een Aantal Cellen Van De Cortex Van De Vatbare Variksupporting

confidence: 78%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 97%

Section: The Infected Cortex Of the Susceptible Varietymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations