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Association of Eucalyptus globulus leaf anatomy with susceptibility to Teratosphaeria leaf disease

Citation

Smith, AH and Potts, BM and Ratkowsky, DA and Pinkard, EA and Mohammed, CL, Association of Eucalyptus globulus leaf anatomy with susceptibility to Teratosphaeria leaf disease, Forest Pathology Article e12395. ISSN 1439-0329 (2017) [Refereed Article]


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DOI: doi:10.1111/efp.12395

Abstract

Resistance of Eucalyptus globulus juvenile foliage to Teratosphaeria leaf disease (TLD) damage has been shown to be under genetic control. Constitutive traits of juvenile leaves such as stomatal density (counted with wax on and with wax removed), total phenolics, total leaf wax, leaf mass per area (LMA) and leaf anatomical features were assessed to determine differences between pairs of resistant and susceptible families. Anatomic features assessed included cuticle, epidermis, palisade spongy mesophyll and total leaf thickness, as well as palisade cell size, shape and intercellular airspace. One interprovenance, one intraprovenance and two within-family contrasts were used to compare resistant and susceptible pairs of families of Australian origin. The more resistant families had a significantly higher LMA and smaller percentage airspace compared with susceptible families. It is argued that one of the mechanisms by which E. globulus resists TLD involves the closely packed palisade mesophyll cells that increases LMA and reduces airspace, thereby restricting pathogen spread once infection has occurred.

Item Details

Item Type:Refereed Article
Keywords:Eucalyptus globulus, leaf anatomy, Teratosphaeria leaf disease, susceptibility
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:Smith, AH (Dr Anna Smith)
Author:Potts, BM (Professor Brad Potts)
Author:Ratkowsky, DA (Dr David Ratkowsky)
Author:Mohammed, CL (Associate Professor Caroline Mohammed)
ID Code:122762
Year Published:2017
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-11-27
Last Modified:2017-12-12
Downloads:0

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