Consequences of resource limitation for recovery from repeated defoliation in Eucalyptus globulus Labilladiere

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Consequences of resource limitation for recovery from repeated defoliation in Eucalyptus globulus Labilladière.

Recovery following defoliation can be modified by co-occurring site resource limitations. The growth response of young Eucalyptus globulus saplings to two defoliation events was examined in an experimental plantation with combinations of low (-) or high (+) water (W) and nitrogen (N) resources. Artificial defoliation was applied at 3 and 9 months of age to remove ~40 and 55% of leaf area in the...

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Increases in photosynthetic capacity (A1500) after defoliation have been attributed to changes in leaf-level biochemistry, water, and/or nutrient status. The hypothesis that transient photosynthetic responses to partial defoliation are regulated by whole-plant (e.g. source-sink relationships or changes in hydraulic conductance) rather than leaf-level mechanisms is tested here. Temporal variatio...

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ژورنال

عنوان ژورنال: Tree Physiology

سال: 2011

ISSN: 0829-318X,1758-4469

DOI: 10.1093/treephys/tpr128