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Defence responses in plantation-grown Eucalyptus globulus and Eucalyptus nitens after artificial fungal inoculation

Citation

Deflorio, G and Franz, E and Beadle, C and Mohammed, C, Defence responses in plantation-grown Eucalyptus globulus and Eucalyptus nitens after artificial fungal inoculation, Forest Pathology, 41, (5) pp. 398-406. ISSN 1437-4781 (2011) [Refereed Article]


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Copyright Statement

Copyright 2010 Blackwell Verlag GmbH

DOI: doi:10.1111/j.1439-0329.2010.00700.x

Abstract

The formation of reaction and barrier zones was studied in the xylem of Eucalyptus globulus and Eucalyptus nitens tree stems after wounding and artificial inoculation with two white rot fungi. The study had two objectives: to describe host responses in Eucalyptus spp. by light microscopy and to determine whether they would differ in a fungal treatment (wounding and inoculation by one of two fungal isolates) when compared to a control treatment (wounding only). Eucalyptus globulus and E. nitens developed similar reaction and barrier zones. The E. globulus barrier zone was characterized by kino vein formation. In both hosts, the reaction zone was primarily influenced by content and distribution of living tracheids and parenchyma cells within the sapwood. By contrast, the anatomy of the barrier zone showed similarities to the basic xylem structure of each host, except for some cell types that were newly formed (sclereids, kino veins) or increased in number (parenchyma cells, tracheids). Other cell types were reduced in number or completely absent. Host response in terms of barrier zone width appeared to be greater in the fungal than control treatment. Both wood decay fungi appeared to induce a wider barrier zone in both species than that associated with non-specific damage caused exclusively by wounding. However, the small number of replicates available for this study was possibly insufficient to provide statistical evidence for different barrier zone width between fungal and control treatments.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Forestry Pests, Health and Diseases
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
Author:Beadle, C (Dr Christopher Beadle)
Author:Mohammed, C (Associate Professor Caroline Mohammed)
ID Code:77856
Year Published:2011
Deposited By:Agricultural Science
Deposited On:2012-06-01
Last Modified:2012-08-30
Downloads:0

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