Measurements of chlorophyll fluorescence in different leaf positions may detect nitrogen deficiency in wheat

Abstract

Nitrogen deficiency strongly influences crop photosynthetic performance and biomass production. In this study, we applied rapid, non-invasive records of chlorophyll a fluorescence kinetics for evaluation of wheat (Triticum aestivum L.) leaf photosynthetic performance. Plants were grown during the whole season in big pots filled with the soil substrate and they were supplied by different doses of nitrogen nutrition. The plant nitrogen and leaf chlorophyll content as well as the plant aboveground biomass were analyzed after chlorophyll fluorescence records in three growth stages. Our results confirmed that the maximum quantum yield of photochemistry frequently used in previous studies was almost insensitive to nitrogen treatment, if measured in young, non-senescent leaves. On the contrary, the performance index was much more responsive. The performance index values derived from parallel measurements in the youngest and third leaf from the top were used to calculate performance index leaf ratio, which correlated well with the plant nitrogen content. Moreover, this parameter was not sensitive to midday depression, which significantly affected the values of other chlorophyll fluorescence parameters. Although the optimum performance index leaf ratio values decreased continuously in the second part of the growing season, the optimum and critical values for each growth stage can be easily identified. Thus, we suggest performance index leaf ratio as the simple parameter for the rapid evaluation of the wheat photosynthetic performance and an early indicator of insufficient nutrition level. Unlike some other approaches, suggested method seems to be useful also in conditions of a moderate nutrient deficiency.

Effect of Nitrogen and Sulphur Fertilization on Chlorophyll Content in Winter Wheat

“…Several studies (Akhter et al, 2016, Sclichting et al, 2015, Živčak et al, 2014 have reported on faster and non-destructive new tools which characterize nitrogen status in plant. Optical properties of leaf pigments (chlorophyll and polyphenols) have been used as wheat plant nitrogen status indicators (Foxa, Piekieleka, & Macneala, 1994).…”

Estimation of nitrogen content based on fluorescence spectrum and principal component analysis in paddy rice

“…Related studies showed that the characteristic peaks of LIF spectra were closely related to the nutrient stress of crops (Tuba et al 2010, Yang et al 2015a). Due to the advantages of rapid, non-destruction and without pre-processing analysis, it has been widely used to estimate canopy N status of maize, tomato, wheat and paddy rice , Yang et al 2015b, Živčák et al 2014a). However, they mainly focused on using the far-red and red fluorescence ratios, fluorescence intensity as well as non-photochemical quenching etc.…”

The effect of various sapropel concentrations on content and fluorescence of photosynthetic pigments of bean

“…Janušauskaitė and Feizienė (2012) have found that nitrogen deficiency could be noticed by investigating the Fv/Fm ratio. Some authors disagree that although Fv/Fm contains valuable information on the status of photosynthetic apparatus, it can be non-specific and often insensitive to many environmental effects (Lawlor, 2002, Brestic et al, 2012, Živčák et al, 2014. Our findings also show that photosystem II efficiency of V. faba increased with increasing sapropel concentration in the soil; however, the increase was insignificant (r = 0.94; p > 0.05) (Figure 1).…”