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Photosynthesis of Eucalyptus globulus with Mycosphaerella leaf disease

Citation

Pinkard, EA and Mohammed, CL, Photosynthesis of Eucalyptus globulus with Mycosphaerella leaf disease, New Phytologist, 170, (1) pp. 119-127. ISSN 0028-646X (2006) [Refereed Article]

DOI: doi:10.1111/j.1469-8137.2006.01645.x

Abstract

• Mycosphaerella leaf disease (MLD) is a major cause of foliage damage in Eucalyptus globulus plantations. Our study is the first to describe the physiological effects of MLD on E. globulus leaves. It involved measurements on both field and potted plants. • Changes in photosynthetic parameters in response to MLD were quantified in a study using gas exchange techniques. • There was a negative linear relationship between light-saturated photosynthesis (A max) and leaf-level damage from MLD. Reductions in A max were proportionally greater than might be expected from the reduction in green leaf area as a result of the disease, indicating that asymptomatic tissue also was affected by MLD. The reductions in A max were not related to increases in stomatal resistance, but were a result of reduced activity of ribulose bisphosphate carboxylase (Rubisco) and changes in the capacity for ribulose bisphosphate (RuBP) regeneration. Changes in mesophyll resistance to CO 2 were also implicated. • The effect of MLD was similar at different sites and irrespective of tree-level infection, suggesting a general leaf-level response of E. globulus to MLD. © CSIRO (2006).

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Forestry Sciences not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other Plant Production and Plant Primary Products
Objective Field:Plant Production and Plant Primary Products not elsewhere classified
Author:Pinkard, EA (Dr Elizabeth Pinkard)
Author:Mohammed, CL (Professor Caroline Mohammed)
ID Code:39717
Year Published:2006
Web of Science® Times Cited:36
Deposited By:Agricultural Science
Deposited On:2006-08-01
Last Modified:2007-04-18
Downloads:0

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