CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Australian Journal of Botany   
Australian Journal of Botany
Journal Banner
  Southern Hemisphere Botanical Ecosystems
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Board
Contacts
Content
Current Issue
Just Accepted
All Issues
Special Issues
Turner Review Series
Sample Issue
For Authors
General Information
Notice to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review an Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter youtube

red arrow PrometheusWiki
blank image
PrometheusWiki
Protocols in ecological and environmental plant physiology

 

Article << Previous     |     Next >>   Contents Vol 44(3)

An Examination of the Drought and Frost Tolerance of Banksia marginata (Proteaceae) as an Explanation of Its Current Widespread Occurrence in Tasmania

J Blake and RS Hill

Australian Journal of Botany 44(3) 265 - 281
Published: 1996

Abstract

Populations of Banksia marginata Cavanilles from sea level to 1040 m above sea level near Hobart were examined for frost and drought tolerance to determine the extent of the inter-population variation and physiological plasticity of this species. This study was designed to give some insight into the reasons behind the successful occupation of a wide range of habitats by B. marginata in Tasmania today. All populations were highly frost tolerant, irrespective of season, with the peak tolerance usually occurring in summer, suggesting a link to some other physiological aspect such as drought tolerance. Water relations results were complex and highly variable among the populations. For the highest altitude population at least it is probable that cell elasticity and high apoplastic water contents, rather than osmotic adjustment, assist in frost and drought tolerance. It is likely that the physiological plasticity and apparent genetic diversity exhibited by these populations assisted the survival of B. marginata in pockets of refugia throughout Tasmania during past climatic upheavals during glacial and interglacial cycles.



Full text doi:10.1071/BT9960265

© CSIRO 1996

blank image
Subscriber Login
Username:
Password:  

 
PDF (1010 KB) $25
 Export Citation
 Print
  
    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2014