Drought responses of Eucalyptus microtheca provenances depend on seasonality of rainfall in their place of origin
作者： Chunyang Li , Frank Berninger , Jarkko Koskela , Eloni Sonninen
DOI: 10.1071/PP99056
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摘要: We exposed seedlings of 12 Eucalyptus microtheca F. Muell. provenances to well-watered and water-stressed growing conditions in a greenhouse experiment investigated the effects drought on various plant properties provenances. found significant variation total biomass, height, root mass/foliage area ratio,foliage area/stem cross sectional ratio, specific leaf (SLA), water-use efficiency (WUE) carbon isotope composition (d 13 C) among The observed inter-provenance was more pronounced treatment than one. Drought increased foliage WUE, d C decreased transpiration SLA. also analysed relationships between climate native habitats that most were strongly correlated with mean driest quarter rainfall. correlation positive for SLA negative WUE C. Finally, we evaluated intra-specific ratio context tree hydraulic architecture: from dry areas trees grown under stress had per stem ratio. However, their length pathway smaller therefore water potential gradient might be these trees.
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