Role of mineral nutrients, antioxidants, osmotic adjustment and PSII stability in salt tolerance of contrasting wheat genotypes

Global food production is threatened due to increasing salinity and can be stabilized by improving salt tolerance of crops. In the current study, salt tolerance potential of 40 local wheat cultivars against 150 mM NaCl stress was explored. Salt treatment at seedling stage caused less reduction in bi...

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Bibliographic Details
Published in:Scientific reports 2022-07, Vol.12 (1), p.12677-12677, Article 12677
Main Authors: Hussain, Nadeem, Sohail, Younas, Shakeel, Nasir, Javed, Muhammad, Bano, Hussan, Gul, Hafiza Saima, Zafar, Zafar Ullah, Frahat Zaky Hassan, Islam, Ghaffar, Abdul, Athar, Habib-ur-Rehman, Ajaj, Rahaf
Format: Article
Language:English
Subjects:
631/449
631/449/1736
631/449/2661
Antioxidants
Chlorophyll
Cultivars
Food production
Genotypes
Humanities and Social Sciences
multidisciplinary
Oxidative stress
Photosystem II
Plant breeding
Principal components analysis
Reactive oxygen species
Salinity
Salinity effects
Salinity tolerance
Salt tolerance
Science
Science (multidisciplinary)
Seedlings
Sensitivity analysis
Sodium chloride
Translocation
Wheat
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Summary:Global food production is threatened due to increasing salinity and can be stabilized by improving salt tolerance of crops. In the current study, salt tolerance potential of 40 local wheat cultivars against 150 mM NaCl stress was explored. Salt treatment at seedling stage caused less reduction in biomass, K + and P while more decline of Na + in tolerant cultivars due to reduced translocation and enhanced exclusion of Na + from leaves. Principal component analysis based selected S-24, LU-26S, Pasban-90 (salt tolerant) and MH-97, Kohistan-97, Inqilab-91 and Iqbal-2000 (salt sensitive) cultivars were evaluated at adult stage applying 150 mM salinity. Osmotic adjustment by accumulation of soluble sugars and proline and accelerated antioxidant enzymes activities caused efficient scavenging of reactive oxygen species making S-24 and LU-26S tolerant while in MH-97 and Kohistan-97, high MDA represent greater membrane damage due to oxidative stress making them salt sensitive. Chlorophyll a fluorescence transients confirmed better efficiency of photosystem II in S-24 and LU-26S based on energy fluxes (ABS/RC, TRo/RC, ETo/RC and DIo/RC), performance index (PI ABS ) and maximum quantum yield (Fv/Fm). These findings can be correlated using molecular techniques to identify genes for salt exclusion, osmotic adjustment and photosynthetic activity for use in molecular breeding programs.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-16922-9