Identification of novel source of salt tolerance in local bread wheat germplasm using morpho-physiological and biochemical attributes

Autor: Habib-ur-Rehman Athar, Nadeem Hussain, Zafar Ullah Zafar, Muhammad Iqbal, Misbah Aamir, Hafiza Saima Gul, Hamid Manzoor, Ayesha Khalid, Sibgha Noreen, Hussan Bano, Abdul Ghaffar, Muhammad Ashraf, Islam Frahat Zaky Hassan, Kausar Hussain Shah, Younas Sohail, Muhammad Rizwan Javed
Rok vydání: 2021
Předmět:
Zdroj: Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/s41598-021-90280-w
Popis: Salt tolerant wheat cultivars may be used as genetic resource for wheat breeding to ensure yield stability in future. The study was aimed to select salt tolerant cultivar(s) to identify novel source of salt tolerance in local wheat germplasm. Initially, 40 local wheat cultivars were screened at 150 mM NaCl stress at seedling stage. Selected salt-tolerant (three; S-24, LU-26S and Pasban-90) and salt-sensitive (four; MH-97, Kohistan-97, Inqilab-91 and Iqbal-2000) wheat cultivars were further evaluated using growth, yield, biochemical and physiological attributes. Growth and yield of selected cultivars were reduced under salt stress due to decline in plant water status, limited uptake of macronutrients (N, P and K), reduced K+/Na+ ratio, photosynthetic pigments and quantum yield of PSII. Wheat plants tried to acclimate salt stress by osmotic adjustment (accumulation of total soluble sugars, proline and free amino acids). Degree of salinity tolerance in cvs. S-24 and LU-26S found to be associated with maintenance of K+/Na+ ratio, osmo-protectant and photosynthetic activity and can be used as donor for salt tolerance in wheat breeding program at least in Pakistan. These cultivars can be further characterized using molecular techniques to identify QTLs/genes for salt exclusion, osmo-protectant and photosynthetic activity for molecular breeding.
Databáze: OpenAIRE
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