Changes in Antioxidative Enzymes of Young and Mature Leaves of Tomato Seedlings under Drought Stress

Serpil ÜNYAYAR; Fazilet Özlem ÇEKİÇ

Makale detayları

Changes in Antioxidative Enzymes of Young and Mature Leaves of Tomato Seedlings under Drought Stress

Yazarlar:

Serpil ÜNYAYAR | Fazilet Özlem ÇEKİÇ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2005 Vol.29 Issue 4, pp.211-216

Belge Tipi:

Makale

Yayın Tarihi:

3/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000813441

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Anahtar kelimeler:

Özet:

 

The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv. Ailsa Craig and ABA-deficient mutant, notabilis, were investigated under drought stress. Although ABA induced increases in ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) activities in drought-stressed young leaves of notabilis, CAT activities remained unchanged in both ABA-treated young and mature leaves of Ailsa Craig under drought. Superoxide dismutase (SOD) activity did not substantially increase in notabilis or Ailsa Craig in all treatments. APX activity significantly increased in ABA-, drought- and drought+ABA- treated young leaves of notabilis. These results indicated that the antioxidant enzyme activities in drought-stressed and ABA-treated leaves might change with the production of active oxygen species (AOS) depending on the ABA content, and the developmental stages of leaves might contribute to the differential prevention of oxidative damage in plants exposed to drought.

 

The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv. Ailsa Craig and ABA-deficient mutant, notabilis, were investigated under drought stress. Although ABA induced increases in ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) activities in drought-stressed young leaves of notabilis, CAT activities remained unchanged in both ABA-treated young and mature leaves of Ailsa Craig under drought. Superoxide dismutase (SOD) activity did not substantially increase in notabilis or Ailsa Craig in all treatments. APX activity significantly increased in ABA-, drought- and drought+ABA- treated young leaves of notabilis. These results indicated that the antioxidant enzyme activities in drought-stressed and ABA-treated leaves might change with the production of active oxygen species (AOS) depending on the ABA content, and the developmental stages of leaves might contribute to the differential prevention of oxidative damage in plants exposed to drought.

Makale detayları

Changes in Antioxidative Enzymes of Young and Mature Leaves of Tomato Seedlings under Drought Stress

Yazarlar:

Serpil ÜNYAYAR | Fazilet Özlem ÇEKİÇ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2005 Vol.29 Issue 4, pp.211-216

Belge Tipi:

Makale

Yayın Tarihi:

3/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000813441

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Abscisic acid

Antioxidant enzymes

Drought stress

notabilis mutant

Lycopersicon esculentum

Sayı

Makale detayları

Changes in Antioxidative Enzymes of Young and Mature Leaves of Tomato Seedlings under Drought Stress

Yazarlar: Serpil ÜNYAYAR | Fazilet Özlem ÇEKİÇ

Yayıncı: TUBITAK

Dergi: Turkish Journal of Biology 2005 Vol.29 Issue 4, pp.211-216

Belge Tipi: Makale

Yayın Tarihi: 3/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000813441

Sıklık: İki Aylık

eISSN: 1303-6092

pISSN: 1300-0152

Abscisic acid

Antioxidant enzymes

Drought stress

notabilis mutant

Lycopersicon esculentum

Sayı

Yazarlar:

Serpil ÜNYAYAR | Fazilet Özlem ÇEKİÇ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2005 Vol.29 Issue 4, pp.211-216

Belge Tipi:

Makale

Yayın Tarihi:

3/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000813441

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152