Drought‐induced leaf shedding in walnut: evidence for vulnerability segmentation
- 1 September 1993
- journal article
- Published by Wiley in Plant, Cell & Environment
- Vol. 16 (7) , 879-882
- https://doi.org/10.1111/j.1365-3040.1993.tb00511.x
Abstract
Trees of Juglans regia L. shed leaves when subjected to drought. Before shedding (when leaves are yellow), the petioles have lost 87% of their maximum hydraulic conductivity, but stems have lost only 14% of their conductivity. This is caused by the higher vulnerability of petioles than stems to water‐stress induced cavitation. These data are discussed in the context of the plant segmentation hypothesis.Keywords
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