Resistance to NaCl salinity is positively correlated with iron and zinc uptake potential of wheat genotypes

Ghulam Abbas, Sadia Rehman, Muhammad Saqib, Muhammad Amjad, Behzad Murtaza, Manzer H Siddiqui, Yinglong Chen

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Abstract

Soil salinity is a serious environmental issue that is drastically reducing crop productivity via limiting the uptake of important micronutrients including iron (Fe) and zinc (Zn). The present research work was accomplished to identify the wheat genotypes with better Fe and Zn uptake potential under saline conditions. The seedlings of eight wheat genotypes (SARC-1, SARC-2, SARC-3, SARC-4, SARC-5, SARC-6, SARC-7 and SARC-8) were exposed to salinity (100 mM NaCl), deficiency of Fe and Zn (one fourth of control) and their combination in Hoagland’s nutrient solution for 28 days. It was noticed that root and shoot growth of all the genotypes decreased due to salinity and nutrient deficiency, and even higher in their combined treatment. The concentration of Na increased while K decreased under both salt stress alone as well as combined with nutrient deficiency. The concentrations and uptake of Fe and Zn greatly decreased in the joint application of salinity and nutrient deficiency followed by nutrient deficiency and saline treatment. Multivariate analysis showed that Na uptake was the major reason for the limited growth and nutrient uptake by wheat genotypes. It was concluded that SARC-5 was the most sensitive genotype against salinity and nutrient deficiency. In contrast, SARC-1 was the most tolerant genotype against salinity and it accumulated the highest contents of both Fe and Zn. Therefore, among the eight genotypes used in the present study, SARC-1 is the most suitable genotype for cultivation on Zn and Fe deficient saline soils.
Original languageEnglish
Pages (from-to)546–555
Number of pages10
JournalCrop and Pasture Science
Volume73
Issue number5
Early online date21 Mar 2022
DOIs
Publication statusPublished - 21 Apr 2022

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