Effect of Different Irrigation Water Salinity on the Antioxidant Enzyme Activity of Purple Carrot (Daucus Carota L) Plant

Güngör A., Taş Ö., Bilir G., Olcay A. C., Altun M., Arslan H., ...Daha Fazla

1st International Agricultural Structures and Irrigation Congress, Antalya, Türkiye, 26 - 28 Eylül 2018, ss.45

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.45
  • Atatürk Üniversitesi Adresli: Hayır

Özet

Plants require several abiotic conditions during their vegetation periods. In case of unfavorable abiotic conditions stress occurs and this can be tolerated by internal production of antioxidant enzymes. In this study, the change in enzyme level of carrot plants that were exposed to 6 different irrigation water salinity (To =0,38 dS/m, T1 =1,5 dS/m, T2 =3 dS/m, T3 =5 dS/m, T4 =7 dS/m, T5 =10 dS/m) in 6 days intervals of irrigation, was investigated.

Leaf samples were collected on the harvest period from carrots which were cultivated under salt stress, and important stress indicator enzymes (glutathione reductase (GR), glutathione s-transferase (GST), superoxide dismutase (SOD)) were calculated.

Due to increased irrigation water salinity; GST, GR and SOD amounts of plants was observed to increase in parallel. Under increased salinity of irrigation water, GST activity was increased till T4 subject, then decreased in T5 subject. Activity of GR enzyme was shown to be similar. Based on the stress caused by the increased salinity in all subjects, SOD activity was increased until T5 subject and reached to the top level. As a salt-sensitive plant, T0 enzyme activities of carrot plant were calculated to be in the highest level.

As a result of the study; GST, GR and SOD enzymes were proven to be an indicator of plant stress level, by showing activity according to the amount of environmental drought, indicating that these parameters can be utilized in planning of irrigation time and evaluation of plant yield.