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Abstract
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Article Information:
Toxic Effects of Lead on Growth and Some Biochemical and Ionic Parameters of Sunflower (Helianthus annuus L.) Seedlings
Hamid Noorani Azad, Amir Houshang Shiva and Rokhsareh Malekpour
Corresponding Author: Hamid Noorani Azad
Submitted: 2011 May, 09
Accepted: 2011 June, 07
Published: 2011 July, 15 |
Abstract:
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Lead (Pb) is one of the non essential and toxic heavy metals which can cause oxidative stress in
plants. The effects of Pb(NO3)2 toxicity on growth and some biochemical parameters of record cultivars of
Helianthus annuus L. were studied under hydroponic condition. Different treatments of Pb(NO3)2 [control (0),
200, 400, 600 and 800 :M] were used in order to consider changes in dry weight, proline and Pb accumulation
in roots and shoots; Total chlorophyll, enzyme activity (catalase and peroxidase) and K+, Ca2+ amounts of
leaves. Compared with the control, Pb treatment caused a significant decrease in roots and shoots dry weight,
leaves chlorophyll, catalase activity and K+, Ca2+ amounts. In contrast, a significant increase in proline and Pb
accumulation of roots and shoots and peroxidase activity of leaves was observed in Pb treatments.
Key words: Catalase, Helianthus annuus, lead toxicity, peroxidase, proline, total chlorophyll,
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Cite this Reference:
Hamid Noorani Azad, Amir Houshang Shiva and Rokhsareh Malekpour, . Toxic Effects of Lead on Growth and Some Biochemical and Ionic Parameters of Sunflower (Helianthus annuus L.) Seedlings. Current Research Journal of Biological Sciences, (4): 398-403.
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ISSN (Online): 2041-0778
ISSN (Print): 2041-076X |
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