Journal Article

PreJuSER-9585

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Monitoring of cold and light stress impact on photosynthesis by using the laser induced fluorescence transient (LIFT) approach

Pieruschka, R.FZJ* ; Klimov, D. ; Kolber, S. K. ; Berry, J. A.

2010
CSIRO Publ. Collingwood, Victoria

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Please use a persistent id in citations: doi:10.1071/FP09266

Abstract: Chlorophyll fluorescence measurements have been widely applied to quantify the photosynthetic efficiency of plants non-destructively. The most commonly used pulse amplitude modulated (PAM) technique provides a saturating light pulse, which is not practical at the canopy scale. We report here on a recently developed technique, laser induced fluorescence transient (LIFT), which is capable of remotely measuring the photosynthetic efficiency of selected leaves at a distance of up to 50 m. The LIFT approach correlated well with gas exchange measurements under laboratory conditions and was tested in a field experiment monitoring the combined effect of low temperatures and high light intensity on a variety of plants during the early winter in California. We observed a reduction in maximum and effective quantum yield in electron transport for Capsicum annuum L., Lycopersicon esculentum L. and Persea americana Mill. as the temperatures fell, while a grass community was not affected by combined low temperature and high light stress. The ability to make continuous, automatic and remote measurements of the photosynthetic efficiency of leaves with the LIFT system provides a new approach for studying and monitoring of stress effects on the canopy scale.

Keyword(s): J ; avocado (auto) ; chilling stress (auto) ; chlorophyll fluorescence (auto) ; electron transport rate (auto) ; evergreen plant (auto) ; pepper (auto) ; PSII efficiency (auto) ; remote sensing (auto) ; tomato (auto)

Note: Barry Osmond and Uwe Rascher played an important role in initiating this project and provided many helpful comments. We are very grateful to Larry Giles and Todd Tobeck for valuable help in performing the experiments. RP was supported by Marie Curie Outgoing International Fellowships (Nr: 041060 - LIFT).

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Research Program(s):

1. Terrestrische Umwelt (P24)

Appears in the scientific report 2010

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