+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Xylem embolism in response to freeze-thaw cycles and water stress in ring-porous, diffuse-porous, and conifer species



Xylem embolism in response to freeze-thaw cycles and water stress in ring-porous, diffuse-porous, and conifer species



Plant Physiology 100(2): 605-613



Vulnerability to xylem embolism by freeze-thaw cycles and water stress was quantified in ring-porous (Quercus gambelii Nutt.), diffuse-porous (Populus tremuloides Michx., Betula occidentalis Hook.), and conifer species (Abies lasiocarpa Nutt., Juniperus scopulorum Sarg.). Embolism was measured by its reduction of xylem hydraulic conductivity; it was induced by xylem tension (water-stress response) and by a tension plus a freeze-thaw cycle (freeze response). Conifers showed little (Juniperus) or no (Abies) freeze response even to repeated cycles. In contrast, Quercus embolized more than 90% by freezing at tensions below 0.2 MPa, whereas similar embolism without freezing required tensions above 4.5 MPa. Diffuse-porous trees (Betula, Populus) showed an intermediate freeze response. The magnitude of the freeze response was correlated with conduit volume but occurred at higher tensions than predicted from theory. Large early-wood vessels (2.8 x 10(-9) m(3)) in oak were most vulnerable to embolism by freezing, small vessels in Populus and Betula were intermediate (approximately 7 x 10(-11) m(3)), and tracheids in conifers (about 3 x 10(-13) m(3)) were most resistant. The same trend was found within a stem: embolism by freeze-thawing occurred preferentially in wider conduits. The water-stress response was not correlated with conduit volume; previous work indicates it is a function of interconduit pit membrane structure. Native embolism levels during winter corroborated laboratory results on freezing: Quercus embolized 95% with the first fall freeze, Populus and Betula showed gradual increases to more than 90% embolism by winter's end, and Abies remained below 30%.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 002548416

Download citation: RISBibTeXText

PMID: 16653035

DOI: 10.1104/pp.100.2.605


Related references

Xylem embolism in ring-porous, diffuse-porous, and coniferous trees of northern Utah and interior Alaska. Ecology 75(6): 1736-1752, 1994

Comparative studies of xylem embolism in ring-porous, diffuse-porous, and coniferous trees of Northern Utah and Interior Alaska. American Journal of Botany 80(6 Suppl. ): 63, 1993

Water loss regulation to soil drought associated with xylem vulnerability to cavitation in temperate ring-porous and diffuse-porous tree seedlings. Trees 28(2): 461-469, 2014

Ring-porous and diffuse-porous xylem structure A component of drought tolerance?. Hortscience 38(5): 670, 2003

Xylem dysfunction during winter and recovery of hydraulic conductivity in diffuse-porous and ring-porous trees. Oecologia 05(4): 435-439, 1996

Xylem Dysfunction during Winter and Recovery of Hydraulic Conductivity in Diffuse-Porous and Ring-Porous Trees. Oecologia 105(4): 435-439, 1996

Xylem dysfunction during winter and recovery of hydraulic conductivity in diffuse-porous and ring-porous trees. Oecologia 105(4): 435-439, 1996

Contrasting whole-tree water use, hydraulics, and growth in a co-dominant diffuse-porous vs. ring-porous species pair. Trees 29(3): 717-728, 2015

The role of initial parenchyma in the transformation of the structure diffuse-porous to ring porous in the secondary xylem of the genus Gmelina Linn. Proc Natl Inst Sci India 19(3): 361-369, 1953

Radial patterns of xylem sap flow in non-, diffuse- and ring-porous tree species. Plant Cell & Environment 19(8): 983-990, 1996

Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species. Tree Physiology 39(8): 1313-1328, 2019

Relationship between the timing of vessel formation and leaf phenology in ten ring-porous and diffuse-porous deciduous tree species. Ecological Research 28(4): 615-624, 2013

Effects of ring-porous and diffuse-porous stem wood anatomy on the hydraulic parameters used in a water flow and storage model. Tree Physiology 27(1): 43-52, 2007

Effects of ring-porous and diffuse-porous stem wood anatomy on the hydraulic parameters used in a water flow and storage model. Tree Physiology 27(1): 43-52, 2007

Remobilization of residual non-aqueous phase liquid in porous media by freeze-thaw cycles. Environmental Science and Technology 45(8): 3473-3478, 2011