This study examined the utility of the ratio of variable fluorescence to maximum fluorescence (Fv/Fm) to detect freezing injury on buds of two Vitis vinifera cultivars: Pinot noir and Pinot gris. Freezing treatments on buds caused a decrease both in Fv/Fm and percentage of budburst, more severely on Pinot gris than Pinot noir, specifically at the lower temperature (-20°C). Fv/Fm ratio showed a close correlation with percentage of budburst, and a threshold of the lethal Fv/Fm was proposed as an indicator of bud mortality. © 2010 Springer Science+Business Media B.V.
Chlorophyll Fluorescence as a Tool for Evaluation of Viability in Freeze-stressed Grapevine Buds / Zulini, L.; Fischer, C.; Bertamini, M.. - In: PHOTOSYNTHETICA. - ISSN 0300-3604. - 48:2(2010), pp. 317-319. [10.1007/s11099-010-0040-5]
Chlorophyll Fluorescence as a Tool for Evaluation of Viability in Freeze-stressed Grapevine Buds
Bertamini M.
2010-01-01
Abstract
This study examined the utility of the ratio of variable fluorescence to maximum fluorescence (Fv/Fm) to detect freezing injury on buds of two Vitis vinifera cultivars: Pinot noir and Pinot gris. Freezing treatments on buds caused a decrease both in Fv/Fm and percentage of budburst, more severely on Pinot gris than Pinot noir, specifically at the lower temperature (-20°C). Fv/Fm ratio showed a close correlation with percentage of budburst, and a threshold of the lethal Fv/Fm was proposed as an indicator of bud mortality. © 2010 Springer Science+Business Media B.V.| File | Dimensione | Formato | |
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