期刊
TREE PHYSIOLOGY
卷 21, 期 9, 页码 599-607出版社
OXFORD UNIV PRESS
DOI: 10.1093/treephys/21.9.599
关键词
bulk elastic modulus; drought; leaf size; osmotic potential; productivity; relative water content; specific leaf area; transpiration; turgor maintenance
类别
Changes in leaf size, specific leaf area (SLA), transpiration and tissue water relations were studied in leaves of rooted cuttings of selected clones of Eucalyptus globulus Labill. subjected to well-watered or drought conditions in a greenhouse. Significant differences between clones were found in leaf expansion and transpiration. There was a significant clone x treatment interaction on SLA. Water stress significantly reduced osmotic potential at the turgor loss point (Pi (0)) and at full turgor (Pi (100)), and significantly increased relative water content at the turgor loss point and maximum bulk elastic modulus. Differences in tissue water relations between clones were significant only in the mild drought treatment. Among clones in the drought treatments, the highest leaf expansion and the highest increase in transpiration during the experiment were measured in those clones that showed an early and large decrease in Pi (0) and Pi (100).
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