Plant Cell, Tissue and Organ Culture

, Volume 91, Issue 2, pp 97–106 | Cite as

Chlorophyll fluorescence imaging for disease-resistance screening of sugar beet

Review

Abstract

Both biotic and abiotic stresses cause considerable crop yield losses worldwide (Chrispeels, Sadava Plants, genes, and crop biotechnology 2003; Oerke, Dehne Crop Prot 23:275–285 2004). To speed up screening assays in stress resistance breeding, non-contact techniques such as chlorophyll fluorescence imaging can be advantageously used in the quantification of stress-inflicted damage. In comparison with visual spectrum images, chlorophyll fluorescence imaging reveals cell death with higher contrast and at earlier time-points. This technique has the potential to automatically quantify stress-inflicted damage during screening applications. From a physiological viewpoint, screening stress-responses using attached plant leaves is the ideal approach. However, leaf growth and circadian movements interfere with time-lapse monitoring of leaves, making it necessary to fix the leaves to be studied. From this viewpoint, a method to visualise the evolution of chlorophyll fluorescence from excised leaf pieces kept in closed petri dishes offers clear advantages. In this study, the plant–fungus interaction sugar beet–Cercospora beticola was assessed both in attached leaf and excised leaf strip assays. The attached leaf assay proved to be superior in revealing early, pre-visual symptoms and to better discriminate between the lines with different susceptibility to Cercospora.

Keywords

Cercospora beticola Sacc. Chlorophyll fluorescence imaging Plant disease resistance quantification Plant–pathogen interaction Sugar beet Thermography 

Abbreviations

BA

6-Benzylaminopurine

Chl-FI

Chlorophyll fluorescence imaging

dpi

Days postinfection

FL

Chlorophyll fluorescence image captured after low intensity excitation

FH

Chlorophyll fluorescence image captured after high intensity excitation

FIS

Fluorescence imaging system

Notes

Acknowledgements

L.C. is a post-doctoral fellow of the Research Foundation—Flanders. D.H. is a post-doc with financial support provided through the European Community’s Human Potential Programme under contract HPRN-CT-2002–00254, STRESSIMAGING. The authors are grateful to Roland Valcke, Laboratory for Molecular and Physical Plant Physiology, Hasselt University, for advice on chlorophyll fluorescence imaging.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Unit Plant Hormone Signalling and Bio-imagingGhent UniversityGentBelgium
  2. 2.Phytopathology DepartmentSESVanderHaveTienenBelgium

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