Mechanisms for minimizing height-related stomatal conductance declines in tall vines

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dc.contributor University of Helsinki, Duke University en
dc.contributor University of Helsinki, Department of Forest Sciences en Domec, Jean-Christophe Berghoff, Henry Way, Danielle Moshelion, Menachem Palmroth, Sari Kets, Katre Huang, Cheng-Wei Oren, Ram 2020-05-23T02:27:26Z 2020-07-01T21:01:14Z 2019-11
dc.identifier.citation Domec , J-C , Berghoff , H , Way , D , Moshelion , M , Palmroth , S , Kets , K , Huang , C-W & Oren , R 2019 , ' Mechanisms for minimizing height-related stomatal conductance declines in tall vines ' , Plant, Cell and Environment , vol. 42 , no. 11 , pp. 3121-3139 . en
dc.identifier.issn 0140-7791
dc.identifier.other PURE: 125385436
dc.identifier.other PURE UUID: 196f8397-f996-4e76-b6b0-d89a2f33bd3b
dc.identifier.other RIS: urn:024590988F9732E73EE63BDBBBE0C5A4
dc.identifier.other WOS: 000473694000001
dc.identifier.other ORCID: /0000-0002-5654-1733/work/67135240
dc.description.abstract The ability to transport water through tall stems hydraulically limits stomatal conductance (g(s)), thereby constraining photosynthesis and growth. However, some plants are able to minimize this height-related decrease in g(s), regardless of path length. We hypothesized that kudzu (Pueraria lobata) prevents strong declines in g(s) with height through appreciable structural and hydraulic compensative alterations. We observed only a 12% decline in maximum g(s) along 15-m-long stems and were able to model this empirical trend. Increasing resistance with transport distance was not compensated by increasing sapwood-to-leaf-area ratio. Compensating for increasing leaf area by adjusting the driving force would require water potential reaching -1.9 MPa, far below the wilting point (-1.2 MPa). The negative effect of stem length was compensated for by decreasing petiole hydraulic resistance and by increasing stem sapwood area and water storage, with capacitive discharge representing 8-12% of the water flux. In addition, large lateral (petiole, leaves) relative to axial hydraulic resistance helped improve water flow distribution to top leaves. These results indicate that g(s) of distal leaves can be similar to that of basal leaves, provided that resistance is highest in petioles, and sufficient amounts of water storage can be used to subsidize the transpiration stream. en
dc.format.extent 19
dc.language.iso eng
dc.relation.ispartof Plant, Cell and Environment
dc.rights en
dc.subject 4112 Forestry en
dc.subject capacitance en
dc.subject Electrical Circuit Analogy en
dc.subject hydraulic compensation en
dc.subject hydraulic resistance en
dc.subject lianas en
dc.subject long-distance transport en
dc.subject Pueraria lobata en
dc.subject electrical circuit analogy en
dc.subject SAPWOOD AREA en
dc.subject KUDZU-VINE en
dc.subject TREE HEIGHT en
dc.subject VESSEL SIZE en
dc.subject PUERARIA-LOBATA en
dc.subject LEAF-AREA en
dc.title Mechanisms for minimizing height-related stomatal conductance declines in tall vines en
dc.type Article
dc.description.version Peer reviewed 2020-05-23
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion

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