ALPHA-TOCOPHEROL-DEPENDENT SALT TOLERANCE IS MORE RELATED WITH AUXIN SYNTHESIS RATHER THAN ENHANCEMENT ANTIOXIDANT DEFENSE IN SOYBEAN ROOTS
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Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Akademiai Kiado Rt
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this paper, we describe the alleviated effects of alpha-tocopherol (alpha-T) on oxidative damage and its possible role as a signal transmitter in plants during salt stress. The results show that exogenously applied alpha-T under salt stress increased root length and weight, but reduced hydrogen peroxide (H2O2), superoxide anion radical (O-2 center dot(-)) and malondialdehyde (MDA) content in soybean roots. The proline content was reduced by alpha-T treatment. Interestingly, endogenous auxin (IAA) level was significantly increased after alpha-T application as compared to salt stress alone. Moreover, alpha-T reduced significantly superoxide dismutase (SOD) enzyme and isoenzyme activity but upregulated peroxidase (POX) 2, 3 and glutathione-stransferase (GST) 1, 3 isoenzyme expression. However, ascorbate peroxidase (APX) enzyme activity was not affected at all. Consequently, the results show that alpha-T serves as a signal molecule under salinity from leaves to roots by increasing remarkably endogenous IAA levels and increasing partially antioxidant activity in roots.
Açıklama
Anahtar Kelimeler
Alpha-tocopherol, IAA, salinity, soybean, antioxidant
Kaynak
Acta Biologica Hungarica
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
68
Sayı
1
