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Foliar Applied Nickel on Buckwheat ( Fagopyrum esculentum ) Induced Phenolic Compounds as Potential Antioxidants
Author(s) -
Sytar Oksana,
Cai Zhenzhen,
Brestic Marian,
Kumar Abhay,
Prasad M. N. V.,
Taran Nataliya,
Smetanska Iryna
Publication year - 2013
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201200512
Subject(s) - fagopyrum , caffeic acid , chemistry , vanillic acid , chlorogenic acid , hydroxybenzoic acid , phenolic acid , malondialdehyde , cinnamic acid , phenols , food science , botany , antioxidant , horticulture , biochemistry , biology , organic chemistry
In this study, Fagopyrum esculentum (common buckwheat) sprayed with nickel (Ni) (0, 0.5, 1.0, 3.0, and 5.0 mM) for different duration has been investigated for Ni accumulation, malondialdehyde (MDA), total phenolics, and phenolic acids. Ni accumulation significantly increased in dose‐dependent manner. Plants exposed for 72 h, showed visible damages as chlorosis and irreversible necrosis. The MDA and total phenolic contents increased at 24 h of Ni treatments. HPLC data revealed that phenolic acids are in good correlation with concentration and durations of treatments. After 24 and 48 h the contents of chlorogenic, p ‐hydroxybenzoic, hesperetic, p ‐anisic, and caffeic acids increased in Ni treated leaves. On the other hand, p ‐hydroxybenzoic, hesperetic, p ‐anisic, p ‐coumaric, caffeic acids contents decreased after 72 h of Ni exposure. Vanillic and cinnamic acid followed same pattern and increased significantly at 3.0 and 5.0 mM after 48 h of Ni exposure. It may suggest that buckwheat can be possible hyperaccumulators of Ni, because of high Ni accumulation in tissues through foliar treatment. Furthermore, the analyzed phenolic acids have potential role as antioxidants, which provide tolerance to buckwheat against Ni treatment.