Effects
of exogenous salicylic acid on growth characteristics and biochemical content
of wheat seeds under arsenic stress
Fikriye Zengin*
Department of
Science Education, Firat University, Elazig - 23119, Turkey
*Corresponding
Author E-mail: fzengin@firat.edu.tr
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Publication
Data
Paper received:
14 December 2012
Revised received:
26 December 2012
Re-revised received:
07 April 2013
Accepted:
10 July 2014
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Abstract
The
present study illustrates the phytotoxic effect of As on wheat seedlings and
pre-application of salicylic acid in alleviating toxic effect of arsenic.
Wheat seedlings treated with different concentrations (50-400?M) of arsenic
decreased the germination rate (34.7% and 86.9%), root and coleptile length,
fresh and dry weight of roots and coleoptile, chlorophyll (67%) and protein
content (27.1%), while increased proline and MDA content. However,
pretreatment with 1mM saliycilic acid partially alleviated the toxic effect
of arsenic on germination parameters and significantly reduced the proline
(181.2%) and MDA (80%) content thereby increasing chlorophyll and protein
content in As stressed wheat plants (p<0.01 or p<0.05). The data
suggests that saliycilic acid reduced the damaging effects generated by As
and enhanced the tolerance of wheat plants to arsenic toxicity. ?
Key
words
Arsenic
toxicity, Chlorophyll, Germination, Proline, Salicylic acid, Wheet
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