A field study was conducted with the aim to elucidate photosynthetic responses of five emmer hulled wheat (Triticum turgidum ssp. dicoccum) accessions to 30 (N-limited) and 100 kg(N) ha–1 (N-sufficient) conditions at control and drought stress (irrigation after 30–40% and 60–70% depletion of available soil water, respectively). Chlorophyll (Chl) a and Chl b concentrations of the emmer wheats remained unchanged but net photosynthetic rate and dry mass increased and decreased, respectively, when received a sufficient amount of N. Smaller drought-induced decreases in Chl concentration, membrane stability index, and dry mass were concomitant to a greater decrease in intercellular CO2 concentration of emmer compared to the durum (Triticum turgidum) and bread wheats (Triticum aestivum). The lack of negative effect of insufficient N on Chl concentration and dry mass of emmer wheat suggests that this type of wheat possesses an obvious potential for organic farming.
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available soil water
- C i :
intercellular CO2 concentration
- E :
- Fv/Fm :
maximal quantum efficiency of PSII
stomatal conductance to the CO2
leaf area index
least significant difference
- M c :
- modern wheats:
free-threshing durum and bread wheats
membrane stability index
- P N :
net photosynthetic rate
reactive oxygen species
plant aboveground dry mass
- WUEi :
intrinsic water-use efficiency
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Acknowledgements: Financial support for conducting this study has been granted by the Isfahan University of Technology, Isfahan, Iran.
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Vaghar, M., Ehsanzadeh, P. Comparative photosynthetic attributes of emmer and modern wheats in response to water and nitrogen supply. Photosynthetica 56, 1224–1234 (2018). https://doi.org/10.1007/s11099-018-0825-5
Additional key words
- hulled wheat
- water-use efficiency