Ref ID: 11032
Ref Type: Journal
Authors: Close, D. C. and Beadle, C. L.
Pub Date: 2005
Journal Name: Journal of Plant Physiology
Volume: 162
Issue: 1
Start Page: 37
End Page: 46
ISBN/ISSN:
Keywords: dynamics/induction/anthocyanin/anthocyanin synthesis/synthesis/Eucalyptus/Eucalyptus nitens/seedlings/seedling/effect/Cold-induced photoinhibition/photoinhibition/pigment chemistry/pigment-chemistry/chemistry/Deane/Maiden/Leaves/leaf/nursery/growth/photochemical efficiency/efficiency/chlorophyll/pigments/high/spectroscopy/transport/rate/plant/plant physiology/physiology/volume
Abstract: The effects of rapid induction and subsequent relaxation of cold-induced photoinhibition on pigment chemistry of Eucalyptus nitens (Deane and Maiden) Maiden seedling leaves was assessed. The seedlings were subjected to four treatments in a nursery, fertilised or non-fertilised and shaded or non-shaded, before induction of photoinhibition in a growth chamber. Within 2 days, growth chamber conditions decreased photochemical efficiency (Fv/Fm) and increased xanthophyll-cycle conversion ratio. This was associated with decreased levels of total chlorophyll and increased levels of xanthophyll-cycle pigments. After 8 days, Fv/Fm of all treatments rose. Anthocyanin levels gradually increased until day eight, except in non-shaded, non-fertilised seedlings, which had high levels before the induction of photoinhibition. Visible spectroscopy indicated increased absorption between 500 and 590 nm, indicative of anthocyanin absorption. Electron transport rate after xanthophyll-cycle relaxation was half that measured before induction of photoinhibition. The findings indicate that anthocyanins may provide a photoprotective role in E. nitens seedlings under conditions of photoinhibition.
The full-text link provided is a pre-publication version of an article published in the Journal of Plant Physiology in the volume stated in this citation. The publisher of Journal of Plant Physiology is Elsevier ( http://www.elsevier.com )
Notes:
Reprint: Not in File
Program: SPF Sustainable Management
Project: 3
Deliverable: 5.1
Confidentiality:
Availability:
Report: Annual Report 2004/5
Type:
Address: chris.beadle@csiro.au