Consequences of salinity and freezing stress for two populations of Quercus virginiana Mill. (Fagaceae) grown in a common garden

Cassandra M. Kurtz, Jessica A. Savage, I. Yu Huang, Jeannine Cavender-Bares

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Climate change is of increasing concern in coastal forests where rising sea levels could lead to dramatic shifts in ecosystem composition. To investigate how inundation may impact coastal ecosystems, we examined the sensitivity of Quercus virginiana Mill., a dominant tree in the southeastern U.S., to increased soil salinity and examined whether high salinity could increase its susceptibility to freezing damage (-10 °C). In a greenhouse, we examined the effect of three salt treatments (0-6 ppt) on acorn development and sapling physiology. We examined samples collected from two populations: inland Florida (FL) and coastal North Carolina (NC). We found that higher salt concentrations did not affect acorn germination, but did retard emergence. In the sapling stage, high salinity was more detrimental to plants from the FL population, causing greater declines in photosynthetic rates, water use efficiency, and dark quantum yield. FL plants also demonstrated a lower freezing tolerance than NC plants but freezing temperatures did not exacerbate effects of salt stress. Our data demonstrate important population-level differences in the salt and freezing tolerance of Q. virginiana. Since salt tolerance is important to the recruitment, growth, and survival of coastal Quercus species, this research can help with future conservation and management of this important species.

Original languageEnglish (US)
Pages (from-to)145-156
Number of pages12
JournalJournal of the Torrey Botanical Society
Volume140
Issue number2
DOIs
StatePublished - Apr 2013

Keywords

  • Quercus virginiana
  • chlorophyll fluorescence
  • freeze tolerance
  • salt tolerance

Fingerprint Dive into the research topics of 'Consequences of salinity and freezing stress for two populations of Quercus virginiana Mill. (Fagaceae) grown in a common garden'. Together they form a unique fingerprint.

Cite this