Degree Type

Dissertation

Date of Award

1984

Degree Name

Doctor of Philosophy

Department

Horticulture

Abstract

Investigations into the nature of ethylene production by Bipolaris sorokiniana and B. sorokiniana infected leaf blades of Poa pratensis were the main objectives of this research. Characteristics of the assay for 1-aminocyclopropane-1-carboxylic acid (ACC) synthase, the enzyme that controls ethylene formation in higher plants, were also studied;Protein was found to interfere with the determination of ACC. Interference was partly overcome by modifying the assay procedure;Methionine (Met) and ACC stimulated ethylene production in B. sorokiniana. ACC was less effective than Met in stimulating ethylene production. Met decreased fungal growth and sporulation;Infection of P. pratensis by B. sorokiniana resulted in necrosis of the afflicted tissue. It was speculated that the host-pathogen interaction involved the contribution of the fungal ACC synthetic pathway and the ethylene forming pathway of the host.

DOI

https://doi.org/10.31274/rtd-180813-6119

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Lloyd W. Colemann, III

Language

en

Proquest ID

AAI8423697

File Format

application/pdf

File Size

96 pages

Included in

Botany Commons

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