Abstract
Aims
Over the course of plant breeding asset old resources such as emmer wheat have been neglected, therefore this study was carried out to evaluate usefulness of ancient emmer wheat genotypes in tackling agricultural soil and water salinity.
Methods
Nine wheat genotypes consisting of four tetraploid (i.e. two standard durum and two emmer hulled wheats) and five hexaploid (i.e. three standard bread and two spelt-macha hulled genotypes) wheats were subjected to three irrigation water salinities (0, 60, and 120 mM NaCl).
Results
Salinity imposed adverse effects on chlorophylls concentration, net CO2 assimilation rate, stomatal conductance, sub-stomatal CO2 concentration, shoot and root dry masses, and root volume of wheat groups examined. Salt-stricken plants of emmer and, to some extents, spelt-macha wheats displayed modest stability in chlorophylls and proline concentrations and shoot dry mass despite being out-performed in terms of net CO2 assimilation rate and stomatal conductance by the durum and bread improved wheats. Na+ concentrations and Na+/K+ of leaf sheath and blade were increased in all groups of wheat, but the magnitude of the increases in emmer and drum groups amounted to twice as much of those of the hexaploid wheats.
Conclusion
Our novel finding was that the ionic imbalances and, contrariwise, dry mass stability and hence salt tolerance were evidently greater in the ancient emmer group of genotypes, compared to improved durum wheats.
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Abbreviations
- Cars:
-
Carotenoids
- Chl:
-
Chlorophyll
- C i :
-
Sub-stomatal CO2 concentration
- FTW:
-
Free threshing wheat
- HW:
-
Hulled wheat
- F0 :
-
Minimum Chl fluorescence
- Fm :
-
Maximum Chl fluorescence
- Fv/Fm:
-
Maximal quantum efficiency of photosystem II
- gs :
-
Stomatal conductance to the CO2
- LPC:
-
Leaf free proline concentration
- LSD:
-
Least significant difference
- PCA:
-
Principle component analysis
- PN :
-
Net photosynthetic rate
- RDM:
-
Root dry mass
- RWC:
-
Relative water content
- SDM:
-
Shoot dry mass
- VRoot :
-
Root volume
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Acknowledgments
Dr. Khalil Zainalinejad and Dr. Hasan Karim-Mojeni are thanked for providing some of the genetic material.
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ZA and PE conceived and designed the experiment. ZA performed the experiment and analysed the data. PE wrote the manuscript and ZA provided editorial advice and prepared the tables.
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Responsible Editor: Janusz J. Zwiazek.
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Abdehpour, Z., Ehsanzadeh, P. Concurrence of ionic homeostasis alteration and dry mass sustainment in emmer wheats exposed to saline water: implications for tackling irrigation water salinity. Plant Soil 440, 427–441 (2019). https://doi.org/10.1007/s11104-019-04090-1
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DOI: https://doi.org/10.1007/s11104-019-04090-1