Abstract
The Ascochyta blight caused by Ascochyta rabiei ( Pass.) Labr. is a serious foliar fungal disease of chickpea (Cicer arientinum L.). The histo- and cytopathological examination of hostpathogen interactions was conducted in resistant ( ELC-195) and susceptible (Canitez-87) cultivars of chickpea at 3, 5, 7 days after inoculation with A. rabiei. Several histological studies have been made with A. Rabiei. No ultrastructural studies comparing the resistant and susceptible reactions of chickpea to A. rabiei have been reported.The hypersensitive response (HR) is a very common reaction in resistant chickpea plants challenged with A. Rabiei. The FfR has also been associated with defence reactions which is phytoalexin synthesis. Phytoalexins are compounds, synthesised in host plant cells, after infection, which have antimicrobial properties. Fligh concentrations are often found in nearby necrotic cells which prevents further growth of the A. Rabiei in resistance chickpea.A. rabiei produce typical appressorium formation for cuticle penetration but stomata penetration have been observed in some micrographs (Fig.l).
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