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Thickening and browning of cortical cell walls in seminal roots of wheat seedlings infected with Gaeumannomyces graminis var. tritici
Author(s) -
PENROSE L.
Publication year - 1987
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1987.tb04165.x
Subject(s) - biology , browning , thickening , hypha , botany , cultivar , cell wall , horticulture , chemistry , polymer science
SUMMARY This paper examines a little studied reaction of wheat roots to invasion by Gaeumannomyces graminis var. tritici , namely the thickening and browning of cortical cell walls. Examination was confined to distal segments of young seminal roots grown in sand. Browning and thickening of walls of cells were associated with the lignification of tissue and appeared to be a response of living or recently live cells to invasion by weakly virulent isolates. Wheat genotypes differed in their ability to thicken and lignify cell walls, and the difference between two wheat cultivars appeared to be under simple genetic control. There was some evidence that cortical browning temporarily retarded radial invasion by hyphae of G. graminis into young seminal roots of wheats.