Record Details
Dynamics of leaf water relations components in co-occurring iso- and anisohydric conifer species
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Dynamics of leaf water relations components in co-occurring iso- and anisohydric conifer species |
| Names |
Meinzer, Frederick C.
(creator) Woodruff, David R. (creator) Marias, Danielle E. (creator) McCulloh, Katherine A. (creator) Sevanto, Sanna (creator) |
| Date Issued | 2014-11 (iso8601) |
| Note | To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by John Wiley & Sons Ltd. and can be found at: http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291365-3040. |
| Abstract | Because iso- and anisohydric species differ in stomatal regulation of the rate and magnitude of fluctuations in shoot water potential, they may be expected to show differences in the plasticity of their shoot water relations components, but explicit comparisons of this nature have rarely been made. We subjected excised shoots of co-occurring anisohydric Juniperus monosperma and isohydric Pinus edulis to pressure-volume analysis with and without prior artificial rehydration. In J. monosperma, the shoot water potential at turgor loss (Ψ[subscript TLP]) ranged from −3.4 MPa in artificially rehydrated shoots to −6.6 MPa in shoots with an initial Ψ of −5.5 MPa, whereas in P. edulis mean Ψ[subscript TLP] remained at ∼−3.0 MPa over a range of initial Ψ from −0.1 to −2.3 MPa.The shoot osmotic potential at full turgor and the bulk modulus of elasticity also declined sharply with shoot Ψ in J. monosperma, but not in P. edulis. The contrasting behaviour of J. monosperma and P. edulis reflects differences in their capacity for homeostatic regulation of turgor that may be representative of aniso- and isohydric species in general, and may also be associated with the greater capacity of J. monosperma to withstand severe drought. |
| Genre | Article |
| Topic | anisohydry |
| Identifier | Meinzer, F. C., Woodruff, D. R., Marias, D. E., McCulloh, K. A., & Sevanto, S. (2014). Dynamics of leaf water relations components in co‐occurring iso‐ and anisohydric conifer species. Plant, Cell & Environment, 37(11), 2577-2586. doi:10.1111/pce.12327 |
