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Mode of Infection of Ascochyta Blight of Chickpea Caused by Ascochyta rabiei
Author(s) -
Pandey B. K.,
Singh U. S.,
Chaube H. S.
Publication year - 1987
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1987.tb04387.x
Subject(s) - ascochyta , pycnidium , biology , conidium , hypha , blight , pith , fungus , botany , phaeohyphomycosis , xylem , germ tube , cell wall , microbiology and biotechnology
Process of infection and histological changes with Ascochyta blight of chickpea caused by A. rabiei (Pass.) Labr. were studied by light microscopy. Germ tubes from conidia of the fungus penetrate the stem tissue at the juncture of two epidermal cells and form subepidermal aggregates until the fourth day. On the sixth day, yellowing and necrotisation of host tissue coincides with formation of mature pycnidia. Fungus causes extensive damage to cellulosic cell walls of parenchymatous cortical and pith tissues in advance of invading hyphae indicating involvement of cell wall degrading enzymes. Lignified tissues, particularly xylem tracheary elements, remain intact.