ISSN:
1573-0832
Keywords:
Allium cepa
;
Botrytis allii
;
penetration responses
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Abstract Penetration of Allium cepa epidermal cells (white, yellow, and red varieties) by Botrytis allii induced a response by host protoplasts in normal tissue which was not observed when penetrations were made in protoplast-free host cell walls. Callose and auto-fluorescing substances (possibly phenolic compounds) were located at the penetration sites only in normal host cells containing protoplasts. Lignin tests were negative. Halos were clearly visible in both types of tissue. Autofluorescence was observed at penetration sites in normal cells of all cultivars but general wall background autofluorescence was not observed in white onions. Autofluorescence was generally yellow green and when treated with ammonium hydroxide became green. Treatment with sodium hydroxide abolished autofluorescence. No attempt was made to isolate the autofluorescing material.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00437400
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