Characterization of potato genotypes by chlorophyll fluorescence during plant aging in a Mediterranean environment

Abstract

Field experiments were conducted in Sicily (south Italy) during two seasons to characterize by chlorophyll (Chl) fluorescence four genotypes (Spunta, Sieglinde, Daytona, and Ninfa) of potato (Solanum tuberosum L.) for off-season production during plant aging and to analyse the possible relation between Chl parameters and tuber yield. Chl fluorescence parameters [initial fluorescence (F 0 ), maximum fluorescence (F m ), F v /F m , time in which maximal fluorescence occurs (T max )] gained from Kautsky kinetics and Chl content were measured weekly, from 5 th to 6 th leaf appearance to beginning of plant senescence in the first season and to full plant senescence in the second season. F 0 and F v /F m were the most reliable Chl fluorescence parameters for the definition of genotypic differences while Chl content and T max were the most reliable Chl parameters to predict plant aging. Tuber yield was highly correlated with Chl content, T max , F 0 , and F m .

The effect of physiological age of potato plants on chosen chlorophyll fluorescence parameters

“…10: 462-467 doi: 10.17221/474/2015-PSE instrument was deemed to be appropriate due to the fact that we wanted to explore the possibility of practical application of chlorophyll fluorescence in the future to evaluate a large number of potato genotypes in terms of their tolerance to high temperatures and drought during the growing season. Parameter F v /F m is the most reliable for the definition of genotype differences (Ierna 2007). However, the parameter PI gave a clear picture of the physiological status of potato plants at the moment of measurement (Strasser et al 2000, Kalaji et al 2012).…”

Effect of gamma radiation on mutant induction of Fagopyrum dibotrys Hara

“…F 0 represents the basal emission of Chl fluorescence when redox components of photosystem are fully oxidized (Ierna 2007). F v /F m is a useful ratio proportional to the quantum yield of PS2 photochemistry and exhibits a high correlation with the quantum yield of net photosynthesis, whose descending value represents the photoinhibition of leaf by stress (Butler andKitajima 1975, Demmig et al 1987).…”

Variation in antioxidant status and productivity in andigena potato clones

“…Lower capacity (reduced leaf area at 90 DAP) and lower efficiency (low F v / F m ) may be associated with lower productivity in JEX/A-121 and JEX/A-122, suggesting a poor possibility for exploiting them through commercial cultivation. F v /F m was found as one of the most reliable chlorophyll fluorescence parameters for the estimation of genotypic differences, and could represent a practical means to discriminate between genotypes under field condition (Ierna 2007). As in case of leaf area, the F v /F m ratio was also higher in JEX/A 911 both at 60 and 90 DAP, 0.72 and 0.70, respectively, which was comparable to commercial varieties and contributed in achieving highest biological yield and tuber yield among the clones evaluated in this study.…”