Black leaf-clips of a commercial fluorometer increased leaf temperature during dark adaptation under high solar radiation

Title:

Black leaf-clips of a commercial fluorometer increased leaf temperature during dark adaptation under high solar radiation

Creator:

Giorio, P., Nuzzo, V., Guida, G., and Albrizio, R.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a2322614-b7e1-4de0-b078-23ff9752643d
uuid:a2322614-b7e1-4de0-b078-23ff9752643d
doi:10.1007/s11099-012-0042-6

Subject:

botanika, botany, leaf-clip effect, leaf temperature, parameter, pepper, photochemical efficiency, tomato, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The use of black leaf-clips for dark adaptation under high solar radiation conditions is reported to underestimate the maximum quantum yield of PSII photochemistry (Fv/Fm) measured by the continuous-excitation fluorometer Pocket PEA. The decrease in Fv/Fm was due to a rise in minimum fluorescence emission (F0), probably resulting from increased leaf temperature (Tl). In field-grown tomato and pepper, fluorescence parameters and Tl in the region covered by the black leaf clip were measured in clipped leaves exposed to solar radiation during dark adaptation (clipped-only leaves) and in clipped leaves protected from solar radiation by aluminium foil (shrouded clipped leaves). Results confirmed significant Fv/Fm underestimates in clipped-only leaves primarily due to increased F0. In one tomato experiment, Tl increased from 30 to 44.5°C in clipped-only leaves, with a negligible rise in shrouded clipped leaves. In two respective pepper experiments, Tl in clipped-only leaves increased from 27 to 36.2°C and 33 to 40.9°C. Based on the results of this study, a clip-effect parameter (PCE) on fluorescence emission is proposed as the difference for Fv/Fm (or -F0/Fm) between shrouded clipped leaves and clipped-only leaves, which resulted to be 0.706 for tomato, and 0.241 and 0.358 for the two pepper experiments., P. Giorio ... [et al.]., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

467-471

Source:

Photosynthetica | 2012 Volume:50 | Number:3

Harvested from:

CDK

Metadata only:

false