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 Board
Contacts
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Reviews
Evolutionary Reviews
Sample Issue
For Authors
General Information
Notice to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review Article
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

 

 Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.


Development of a diurnal dehydration index for spring barley phenotyping

Pablo Rischbeck, Peter Baresel, Salah Elsayed, Bodo Mistele, Urs Schmidhalter

Abstract

Spectral and thermal assessments may enable the precise, high-throughput and low-cost characterisation of traits linked to drought-tolerance. However, spectral and thermal measurements of the canopy water status are influenced by the crops´ soil coverage, the size of the biomass and other properties such as the leaf angle distribution. The aim of this study was to develop a referenced spectral method that would be minimally influenced by potentially perturbing factors for retrieving the water status of differing cultivars. Sixteen spring barley cultivars were grown in field trials under imposed drought stress, natural drought stress and irrigated conditions. The relative leaf water content of barley plants declines diurnally from pre-dawn until the afternoon, while other plant traits such as the biomass change little throughout the day. As an indicator of the current drought stress, pre-dawn and afternoon values of the relative leaf water content were assessed spectrally. Such changes are only slightly influenced by other perturbing factors. A new spectral index (Diurnal Dehydration Index) was developed by using the wavelengths 730 nm and 457 nm collected from an active spectrometer. This index allowed the differentiation of the drought tolerance of barley plants. The Diurnal Dehydration Index was significantly related to final biomass, grain yield and harvest index and significantly different between cultivars. Compared to other indices, the Diurnal Dehydration Index offered a higher stability in retrieving the water status of barley plants. Due to its diurnal assessment, the index was barely influenced by the cultivars´ differences in biomass at the time of measurement. It may represent a valuable tool for assessing the water status or drought tolerance in breeding nurseries.

FP14069  Accepted 28 May 2014
 
© CSIRO 2014



Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2014