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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Nov 2018, 39 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Tolerance capacity of Turkish genotypes of barley

(Hordeum vulagare L.) for cadmium stress

 

M.K.A. Ansari1,2, A. Ahmad3, I.M. Aref4, G. Owens5 and M. Iqbal6*

1Cyanobacterial Biotechnology Laboratory, Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia,?? New Delhi -110 025, India

2Molecular Biology Laboratory, Department of Biology, Faculty of Science, Andolu University, Eskisehir, 26470, Turkey

3Nanobiotechnology Laboratory, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh -202 002, India

4Department of Plant Production, College of Food & Agricultural Sciences, King Saud University, Riyadh-11451, Saudi Arabia

5Environmental Contaminants Group, Mawson Institute, University of South Australia, Mawson Lakes - 5095, Australia

6Molecular Ecology Laboratory, Department of Botany, Faculty of Science, Hamdard University, New Delhi -110 062, India

*Corresponding Author E-mail: iqbalg5@yahoo.co.in

 

 

 

Key words

Cadmium stress

Genotype screening

Hordeum vulgare

Seed germination

Seedling growth

 

 

 

Publication Data

Paper received : 30.08.2017???????

Revised received : 16.12.2017????

Accepted : 19.02.2018

 

Abstract

Aim: Elevated levels of heavy metals in agricultural soils result in significant contamination of food in Turkey, where cadmium toxicity is currently one of the most serious environmental issues. This study was undertaken to screen the various Turkish genotypes of barley for their sensitivity/tolerance towards cadmium stress.? ????

 

Methodology: Short-term experiments involving plant exposure to different Cd concentrations (0?100 ?M) were conducted to evaluate the response of ten barley genotypes (viz., Aydanhanım, Bilgi-91, ?ildir-02, Erginel-90, İnce-04, Kalayci-97, Keser, Larende, ?zdemir-05, Tarm-92) under hydroponic conditions. Seed germination, seedling growth and Cd accumulation in plant tissues were taken as the criteria to evaluate the comparative genotypic response to Cd stress. ?

 

Results: Cd-induced stress significantly decreased seed germination percentage in all genotypes and the effect was dose-dependent. At 100 ?M Cd stress, genotypes Keser and Aydanhanim showed the maximum (46%) and minimum (12%) loss respectively, compared with the control. Root length was reduced by 68% and 30%, while shoot length declined by 44% and 11% in these genotypes, respectively. Similarly, the loss of root and shoot biomass was maximum in genotype Keser and minimum in Aydanhanim. However, genotype Aydanhanim accumulated the maximum (5.96 ?g g-1 d.wt.), whereas Keser retained the minimum (5.41 ?g g-1 d.wt.) amount of Cd in their roots at 100 ?M. Cd accumulation in shoot also displayed a similar genotypic difference.??? ???

 

Interpretation: Based on the above observations, Aydanhanım was Cd-tolerant, while Keser was most susceptible among the genotypes studied. Thus, genotype Aydanhanim has a promise to be a suitable candidate for phytoremediation of Cd-contaminated sites.

 

 

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