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 > Functional Plant Biology   
Functional Plant Biology
Journal Banner
  Plant Function & Evolutionary Biology
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Structure
Contacts
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Reviews
Evolutionary Reviews
Sample Issue
Call for Papers
For Authors
General Information
Scope
Submit Article
Author Instructions
Open Access
Awards and Prizes
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 LinkedIn

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

 

Article << Previous     |     Next >>   Contents Vol 37(9)

Primary nerve (vein) density influences spatial heterogeneity of photosynthetic response to drought in two Acacia species

Katy E. Sommerville A B C, Teresa E. Gimeno B, Marilyn C. Ball A

A Plant Science Division, Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia.
B Laboratorio Internacional de Cambio Global (LINC-Global), Instituto de Recursos Naturales, CCMA, CSIC, Serrano 115, 28 006 Madrid, Spain.
C Corresponding author. Email: katy.sommerville@anu.edu.au
 
PDF (513 KB) $25
 Supplementary Material
 Export Citation
 Print
  


Abstract

We examined the relationship between variation in phyllode nerve density and the spatio-temporal response of the photosynthetic apparatus to water-stress in two Acacia s.str. species with contrasting nerve patterns: Acacia floribunda (Vent.) Willd and Acacia pycnantha Benth. A. floribunda had greater primary nerve density than A. pycnantha and also showed greater spatial homogeneity in photosynthetic function with drought than phyllodes of A. pycnantha. A. pycnantha had lower maximum quantum efficiency of PSII in phyllode tissue further from primary nerves consistent with its lower primary nerve density. Further, A. floribunda phyllodes maintained function of the photosynthetic apparatus with drought for longer and recovered more swiftly from drought than A. pycnantha. These findings suggest that greater primary nerve density may enhance drought tolerance and are consistent with the observed predominance of acacias with high primary nerve density in areas with lower precipitation.

Keywords: fluorescence, foliage, hydraulic architecture, photosynthesis, water, wattle.


   
Subscriber Login
Username:
Password:  

    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2015