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Journals / Turkish Journal of Biology / 2005 / Cilt: 29 - Sayı: 4

Kuraklık stresi altındaki domates fidelerinin genç ve olgun yapraklarının antioksidant enzimlerindeki değişiklikler

Changes in antioxidative enzymes of young and mature leaves of tomato seedlings under drought strees

Serpil ÜNYAYAR
Fazilet Özlem ÇEKİÇ
Pages
211–216
Publication Date
2022-10-18
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

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.

📌 3 Key Takeaways

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Objective & Hypothesis:The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv.
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Key Findings & Data:Although ABA induced increases in ascofbate 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.
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Conclusion & Impact: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.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

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 ascofbate 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.

Özet

Kuraklık stresine maruz bırakılan 4 haftalık Lycopersicon esculentum Mili. cv. Ailsa Craig (AC) and absisik asit (ABA) mutantı notabilis'm genç ve olgun yapraklarında antioksidant enzimler üzerine ABA uygulamasının etkisi incelendi. ABA kuraklık stresi uygulanan notabilis'm genç yapraklarında askorbat peroksidaz (AP), glutatyon reduktaz (GR) ve katalaz (KAT) aktivitelerini arttırırken, Ailsa Craig'in genç ve olgun yapraklarında KAT aktivitesi değişmemiştir. Bütün uygulamalarda notabilis ve Ailsa Craig'de superoksit dismutaz (SOD) aktivitesinde belirgin bir değişiklik olmamıştır. Notabilis'm ABA, kuraklık ve kuraklık-ABA uygulanan genç yapraklarında APX aktivitesi belirgin bir şekilde artmıştır. Bu sonuçlar kuraklık stresi ve ABA uygulanan yapraklarda antioksidant enzim aktivitelerinin ABA içeriğine bağlı olarak üretilen aktif oksijen türleri (A0T) ile değişebileceğini ve yaprakların gelişim evrelerinin kuraklığa maruz bırakılan bitkilerde oksidatif hasarın farklı şekilde önlenmesine katılabileceğini göstermektedir.

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Cite This Article

ÜNYAYAR, S., ÇEKİÇ, F. Ö. (2022). Kuraklık stresi altındaki domates fidelerinin genç ve olgun yapraklarının antioksidant enzimlerindeki değişiklikler. Turkish Journal of Biology, Cilt: 29 - Sayı: 4, 211–216. https://ajindex.com/articles/600554

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