Detecting differences in wheat for salt tolerance through multi parameters evaluation-ii: physiological parameters.

Mohammad Akram; Rubina Arshad; Mohammad Afzaal; Shafqat Farooq; Muhammad Ashraf; Farooq-Azam

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Detecting differences in wheat for salt tolerance through multi parameters evaluation-ii: physiological parameters.

Author(s)

Mohammad Akram Nuclear Institute for Agriculture & Biology (NIAB), PO Box 128, Jhang road Faisalabad, Pakistan

Rubina Arshad Nuclear Institute for Agriculture & Biology (NIAB), PO Box 128, Jhang road Faisalabad, Pakistan

Mohammad Afzaal Nuclear Institute for Agriculture & Biology (NIAB), PO Box 128, Jhang road Faisalabad, Pakistan

Shafqat Farooq PAEC HQ, Opposite K Block Secretariat, Islamabad, Pakistan

Muhammad Ashraf Department of Botany, University of Agriculture, Faisalabad, Pakistan

Farooq-Azam Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, Pakistan

Abstract

A pot experiment was conducted in a randomized complete block design using 3 wheat genotypes comprising salt sensitive cultivar Inqlab (V1), a known salt tolerant line N-1073 (V2), a newly developed wheat genotype N-9760 (V3) and 4 salinity levels of 15 (control), 5, 10, and 15 dS m-1 developed in irrigation water The objectives were to examine i) variation in accumulation of different ions and different attributes of chlorophyll fluorescence on fully developed flag leaf and ii) possible relationship of quantum yield of chlorophyll fluorescence (Fv/Fm) with various ions and grain yield at maturity stage Concentrations of Ca2+ in different genotypes differed significantly under control and various salinity levels in both root and shoot especially under 15 dS m-1 ,Cl- concentrations in roots and Na+ in shoots and roots increased while K+ reduced significantly in both shoots and roots under increasing salinity levels Line N-1073 restricted the movement of Clfrom root to shoot but not of Na+ under 15 dS m-1 Salt stress significantly reduced K+/Na+ ratio in the shoot and root with a maximum reduction observed in N-1073 (V2) under EC 15 dS m-1 Ca2+/Na+ ratio also reduced significantly under salt stress especially in Inqlab (V1) All the four chlorophyll fluorescence parameters did not show any effect of salinity on N-1073 (V2), however, F0 and Fv in V3 and V1 and Fv/Fm in V3 were significantly affected In V2, the value of Fv/Fm was 082 at EC 15 dS m-1 but for V3, it was only was 028 The relationship of Fv/Fm with various ion concentrations and grain yield was different for all the three genotypes Categorization of germplasm on the basis of increasing tolerance was of the order of V1, V2 and V3 Possible underlying reasons have been discussed in detail.

Publication Details

Page(s) 1533-1541

DOI DOI not available

Published Journal: Pakistan Journal of Botany, Volume: 44, Issue: 5, Year: 2012

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