Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 349199
Title Insights into the effects of chilling on photoinhibition
Author(s) Hogewoning, S.W.; Harbinson, J.
Source In: Comparative Biochemistry and Physiology: Annual main meeting of the Society for Experimental Biology, Canterbury (UK), April 2-7, 2006. - Nederland : Elsevier - p. S152 - S152.
Event Nederland : Elsevier Annual main meeting of the Society for Experimental Biology, 2006-04-02/2006-04-07
Department(s) Horticultural Supply Chains
Publication type Abstract in scientific journal or proceedings
Publication year 2006
Abstract We studied the effect of chilling on the PSII efficiency in leaves of Calathea makoyana. Chilling treatments were performed at 5 -C and 10 -C, and for different durations (varying from 1 to 7 days) under a moderate irradiance (120 mmol m 2 s 1). The individual leaves were divided into a shaded zone, two illuminated, chilled zones, an unchilled leaf tip and sometimes an unchilled leaf base. Measurements of the dark adapted Fv/Fm were made on the different leaf zones at the end of the chilling treatment, and then for several days there after to monitor recovery. Chilling up to seven days in the dark did not affect PSII efficiency and never resulted in leaf necrosis, whereas chilling in the light caused severe photoinhibition and sometimes leaf necrosis. Photoinhibition increased with the duration of the chilling period, whereas chilling temperature had no effect. In the unchilled leaf tip photoinhibition also occurred whereas in the unchilled leaf base it did not. Photoinhibition in the unchilled leaf tip was however less severe and less consistent than it was in the chilled irradiated leaf zones. No leaf necrosis ever occurred in the unchilled leaf tip, even when mean PSII efficiency fell below 0.4, a value associated with leaf necrosis in the chilled irradiated zone. Whichever the zone (chilled in light, unchilled in light), photoinhibition became permanent if the mean value dropped below 0.4. Starch accumulated in the unchilled leaf tip, in contrast to the adjacent chilled irradiated zone, suggesting that photoinhibition was a secondary effect caused by sink limitation in the unchilled leaf tip, whereas in the chilled zone damage was due to the chilling in combination with irradiation.
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