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Safety and efficiency conflicts in hydraulic architecture: scaling from tissues to trees

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dc.contributor.author Sperry, John S. en
dc.contributor.author Meinzer, Frederick C. en
dc.contributor.author McCulloh, Katherine A. en
dc.date.accessioned 2011-02-16T18:27:33Z
dc.date.available 2011-02-16T18:27:33Z
dc.date.issued 2008
dc.identifier.citation Sperry, John S., Meinzer, Frederick C., and McCulloh, Katherine A. 2008. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F12186">Safety and efficiency conflicts in hydraulic architecture: scaling from tissues to trees</a>." <em>Plant, Cell and Environment</em>. 31 (5):632&ndash;645. <a href="https://doi.org/10.1111/j.1365-3040.2007.01765.x">https://doi.org/10.1111/j.1365-3040.2007.01765.x</a> en
dc.identifier.issn 0140-7791
dc.identifier.uri http://hdl.handle.net/10088/12186
dc.description.abstract Tree hydraulic architecture exhibits patterns that propagate from tissue to tree scales. A challenge is to make sense of these patterns in terms of trade-offs and adaptations. The universal trend for conduits per area to decrease with increasing conduit diameter below the theoretical packing limit may reflect the compromise between maximizing the area for conduction versus mechanical support and storage. Variation in conduit diameter may have two complementary influences: one being compromises between efficiency and safety and the other being that conduit tapering within a tree maximizes conductance per growth investment. Area-preserving branching may be a mechanical constraint, preventing otherwise more efficient top-heavy trees. In combination, these trends beget another: trees have more, narrower conduits moving from trunks to terminal branches. This pattern: (1) increases the efficiency of tree water conduction; (2) minimizes (but does not eliminate) any hydraulic limitation on the productivity or tissue growth with tree height; and (3) is consistent with the scaling of tree conductance and sap flow with size. We find no hydraulic reason why tree height should scale with a basal diameter to the two-thirds power as recently claimed; it is probably another mechanical constraint as originally proposed. The buffering effect of capacitance on the magnitude of transpiration-induced xylem tension appears to be coupled to cavitation resistance, possibly alleviating safety versus efficiency trade-offs. en
dc.relation.ispartof Plant, Cell and Environment en
dc.title Safety and efficiency conflicts in hydraulic architecture: scaling from tissues to trees en
dc.type Journal Article en
dc.identifier.srbnumber 76975
dc.identifier.doi 10.1111/j.1365-3040.2007.01765.x
rft.jtitle Plant, Cell and Environment
rft.volume 31
rft.issue 5
rft.spage 632
rft.epage 645
dc.description.SIUnit Encyclopedia of Life en
dc.description.SIUnit Forces of Change en
dc.description.SIUnit STRI en
dc.citation.spage 632
dc.citation.epage 645

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