4th EucheMs chemistry congress

Poster Session 1
s918
chem. Listy 106, s587–s1425 (2012)
Poster session 1 - Environmental Chemistry
P - 0 1 1 6
effeCtS of uv-B rAdiAtion And ButyLAted
hydroxyAniSoLe (BhA) on the reSPonSe of
AntioxidAnt defenSe SySteMS in winter
wheAt (tritiCuM AeStivuM L. yiLdiriM)
SeedLinGS
e. tASGin 1 , h. nAdAroGLu 2 , K. eKreM 3
1 Bayburt Education Faculty, Chemistry, Bayburt, Turkey
2 Erzurum Vocational Training School, Chemistry, Erzurum,
Turkey
3 Oltu Earth Sciences Faculty, Geological Engineering,
Erzurum, Turkey
Due to thinness of the ozone layer, the world’s surface has
been exposed to UV-B radiation which is potentially harmful for
the plant growth, development and physiology. UV radiation in
plants are caused through the production of deleterious free
radicals/reactive oxygen species (ROS) which leads to synthesis
of some protective substances in plants. This protective antioxidant
system includes enzymes such as peroxidase (POX), catalase
(CAT), paraoxonase (PON) etc.; vitamins; phytochemicals;
minerals and food addictives.
Butylated hydroxyanisole (BHA, 2-tert-Butyl-4-hydroxyanisole
and 3-tert-butyl-4-hydroxyanisole) is a food additive and it is an
aromatic organic compound. BHA has been widely used as
antioxidants in the food industry. Effects of UV and butlated
hydroxanisol (BHA) on the activities of antioxidant enzymes were
studied on the leaves of wheat cultivars, in winter (Triticum
aestivum L. Yildirim). Fifteen days old wheat seedlings were
treated with UV radiation (240 nm, 3 day) before they are treated
with BHA (20 °C). Supplementary UV-B radiation and
UV-B+BHA significantly decreased chlorophyll and total phenol
contents. The activities of enzyme extracts; polyphenol oxidase,
catalase, paraoxonase and peroxidase were determined in the
leaves both under normal, UV-B ( Co (88%)> Fe (78%)> Mn (78%)> Nickel (78%)>
> Copper (66%)> Lead (63%)> Cadmium (59%). The results
show sediment contamination by Nickel, Cadmium and Lead,
according to the world aquatic sediments and mean earth crust
values. Manganese and Copper have strong association with
organic matter and are of high portion of sulfide bonded ions.
Cluster analysis was performed in order to assess heavy metal
interactions between water and sediment. Accordingly, Nickel,
Cadmium and Copper are earth-originated. Zink, Copper and
Manganese are dominated by pH. All the elemental concentrations
in water and sediment are correlated except for sedimental copper.
Keywords: Anthropogenic; Lithogenous; Sediment; Trace
metal;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc