Effects of putrescine and ethephon on some oxidative stress enzyme activities and proline content in salt stressed spinach leaves

OZTURK L., Demir Y.

PLANT GROWTH REGULATION, cilt.40, sa.1, ss.89-95, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 40 Sayı: 1
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1023/a:1023078819935
  • Dergi Adı: PLANT GROWTH REGULATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.89-95
  • Anahtar Kelimeler: catalase, ethephon, peroxidase, polyphenol oxidase, proline, putrescine, salt, PEROXIDASE-ACTIVITY, POLYPHENOL OXIDASE, ETHYLENE, POLYAMINES, RESPONSES, PLANTS
  • Atatürk Üniversitesi Adresli: Evet

Özet

The effects of putrescine and ethephon on peroxidase (POD; EC 1.11.1.7), polyphenol oxidase (PPO; EC 1.14.18.1), catalase (CAT; EC 1.11.1.6) activities and proline content in spinach leaves under saline stress were investigated. In control conditions, putrescine increased PPO and CAT activities and proline content, but decreased POD activity. Ethephon increased these three enzyme activities but did not affect proline content. In saline conditions, putrescine increased POD and CAT activities and proline content, while it decreased PPO activity. Ethephon increased both PPO and CAT activities and proline content, but decreased POD activity. Putrescine and ethephon have opposite effects on the enzyme activities and proline accumulation because they acts as antagonists.