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Drought‐induced leaf shedding in walnut: evidence for vulnerability segmentation
Author(s) -
TYREE M. T.,
COCHARD H.,
CRUIZIAT P.,
SINCLAIR B.,
AMEGLIO T.
Publication year - 1993
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1993.tb00511.x
Subject(s) - juglans , hydraulic conductivity , context (archaeology) , xylem , biology , horticulture , water stress , vulnerability (computing) , botany , ecology , soil water , paleontology , computer security , computer science
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.