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Growth and physiological responses of cereals speciesunder lead stress

By: Hana Souahi, Ahlem Gharbi, Zina Gassarellil

Key Words: Pollution, Lead, Cereals, Growth, Tolerance

Int. J. Biosci. 11(1), 266-273, July 2017.

DOI: http://dx.doi.org/10.12692/ijb/11.1.266-273

Certification: ijb 2017 0031

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Abstract

Cereals are the most important staple foods for mankind worldwide and represent the main constituent of animal feed. Their toxicity depends on several factors including the dose, route of exposure, and chemical species, as well as the age, gender, genetics, and nutritional status of exposed individuals. A study was conducted to determine the effect of different concentrations of lead on morphological parameters (root length), the concentrations of chlorophyll in plant leaves provide information about the physiological state of plants and were determined using a spectrophotometer. Seed were grown under laboratory conditions at 0, 0.15, 0.3 and 0.6 g/l of metal ions of lead. The experiment was evaluated in Petri dishes over a period of 14 days. All results, when compared to control, showed Pb adversely affecting the morphological and physiological parameters of the test plants. All cereal species showed very higher decrease (p< 0.001) in radicle length to increased level of Pb (CH3COO)2. However, a significant decrease of radicle number for all plants was observed at concentrations 0.6 g/l of metal. The increase in lead concentration also caused a decline in the net rate of chlorophyll total in Triticoseale wittmack. Among the 4 studied plants, the most sensitive to Pb exposure were Triticoseale wittmack.

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Growth and physiological responses of cereals speciesunder lead stress

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Hana Souahi, Ahlem Gharbi, Zina Gassarellil.
Growth and physiological responses of cereals speciesunder lead stress.
Int. J. Biosci. 11(1), 266-273, July 2017.
http://www.innspub.net/ijb/growth-physiological-responses-cereals-speciesunder-lead-stress/
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