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Antifungal compounds in Geraldton waxflower tissues

Antifungal compounds in Geraldton waxflower tissues Geraldton waxflower is the most economically importantnative Australian cut flower export. Infection of wax flower by Botrytis cinerea can lead to unacceptable levels of flower abscission after harvest. An investigation was conducted into the nature and identities of constitutive antifungal compounds in flowers and leaves. Antifungal activity against B, cinerea (pathogen) and Cladosporium cladosporioides (bioassay organism) was observed in leaf and flower extracts. Leaf tissue contained less antifungal activity than flower tissue. Four antifungal compounds were common to the three different waxflower cultivars studied. Two antifungal compounds were identified as the sesquiterpene, globulol, and the monoterpene, grandinol. At least two unidentified phenolic compounds also demonstrated strong antifungal activity. Notwithstanding general similarities in antifungal profiles, it was evident from TLC bioassays that variations exist in some antifungal compounds between different wax flower cultivars. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

Antifungal compounds in Geraldton waxflower tissues

Australasian Plant Pathology , Volume 32 (3) – Jan 28, 2011

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Publisher
Springer Journals
Copyright
Copyright © 2003 by Australasian Plant Pathology Society
Subject
Life Sciences; Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1071/AP03042
Publisher site
See Article on Publisher Site

Abstract

Geraldton waxflower is the most economically importantnative Australian cut flower export. Infection of wax flower by Botrytis cinerea can lead to unacceptable levels of flower abscission after harvest. An investigation was conducted into the nature and identities of constitutive antifungal compounds in flowers and leaves. Antifungal activity against B, cinerea (pathogen) and Cladosporium cladosporioides (bioassay organism) was observed in leaf and flower extracts. Leaf tissue contained less antifungal activity than flower tissue. Four antifungal compounds were common to the three different waxflower cultivars studied. Two antifungal compounds were identified as the sesquiterpene, globulol, and the monoterpene, grandinol. At least two unidentified phenolic compounds also demonstrated strong antifungal activity. Notwithstanding general similarities in antifungal profiles, it was evident from TLC bioassays that variations exist in some antifungal compounds between different wax flower cultivars.

Journal

Australasian Plant PathologySpringer Journals

Published: Jan 28, 2011

References