Tuz Stresi Altındaki Hıyar Bitkilerinde Ekzojen Askorbik Asit Uygulamalarının Fotosistem II Aktivitesi Üzerindeki Etkileri

Sezen Toksoy; Ali Doğru

doi:10.18016/ksutarimdoga.vi.732141

EN TR

Effects of Exogenous Ascorbic Acid Application on Photosystem II Activity in Cucumber Plants under Salt Stress

Abstract

The effects of the exogenous ascorbic acid application on photosystem II activity were investigated in salt-stressed (100 mM NaCl) cucumber (Cucumis sativus L.) cv. Beith Alpha through chlorophyll a fluorescence technique. Salt stress inhibited electron movements both in donor and acceptor site of photosystem II in cucumber leaves. In addition, salt application led to the decreased level of active reaction centers, the accumulation of the reduced reaction centers, the decreased ability of quinonA and plastoquinon to reduce and the increased thermal dissipation in cucumber leaves. Ascorbic acid, on the other hand, ameliorated the adverse effect of salt stress on electron movements in donor and acceptor site of photosystem II in cucumber plants. Moreover, ascorbic acid caused to the increased level of active reaction centers, the decreased level of accumulation of the reduced reaction centers, the increased ability of quinonA and plastoquinon to reduce and the decreased thermal dissipation in cucumber leaves. As a result, it might be concluded that ascorbic acid application improved salt tolerance in cucumber plants and it may be used for agricultural purposes.

Keywords

Tuz Stresi Altındaki Hıyar Bitkilerinde Ekzojen Askorbik Asit Uygulamalarının Fotosistem II Aktivitesi Üzerindeki Etkileri

Öz

Tuz stresi (100 mM NaCl) altındaki Beith Alpha hıyar (Cucumis sativus L.) çeşidinde ekzojen askorbik asit uygulamasının fotosistem II aktivitesi üzerindeki etkileri klorofil a floresansı tekniği yardımıyla araştırılmıştır. Tuz stresi hıyar yapraklarında fotosistem II’nin hem donör hem de akseptör bölgesindeki elektron hareketlerini inhibe etmiştir. Ayrıca tuz stresinin hıyar bitkisinde aktif reaksiyon merkezi miktarını ve kinonA ile plastokinonun indirgenme yeteneğini azalttığı, indirgenmiş reaksiyon merkezlerinin birikimini ve termal disipasyon enerjisini artırdığı belirlenmiştir. Askorbik asit uygulaması ise hıyar bitkilerinde tuz stresinin fotosistem II’nin donör ve akseptör bölgesindeki elektron hareketleri üzerindeki olumsuz etkisini ortadan kaldırmıştır. Ek olarak askorbik asit uygulaması hıyar yapraklarındaki aktif reaksiyon merkezi miktarını ve kinonA ile plastokinonun indirgenme yeteneğini artırırken, indirgenmiş reaksiyon merkezi miktarını ve termal disipasyon enerjisini azaltmıştır. Sonuç olarak askorbik asidin hıyar yapraklarında tuz toleransını artırdığı ve bu yaklaşımın tarımsal amaçlarla kullanılabileceği söylenebilir.

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Kaynakça

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Ayrıntılar

Birincil Dil

Türkçe

Konular

-

Bölüm

Araştırma Makalesi

Yazarlar

Sezen Toksoy ^*
0000-0002-1564-9465
Türkiye

Ali Doğru
0000-0003-0060-4691
Türkiye

Yayımlanma Tarihi

31 Ağustos 2021

Gönderilme Tarihi

4 Mayıs 2020

Kabul Tarihi

17 Aralık 2020

Yayımlandığı Sayı

Yıl 2021 Cilt: 24 Sayı: 4

DOI

https://doi.org/10.18016/ksutarimdoga.vi.732141

IZ

https://izlik.org/JA29XZ64FD

Kaynak Göster

RIS / Bibtex

APA

Toksoy, S., & Doğru, A. (2021). Tuz Stresi Altındaki Hıyar Bitkilerinde Ekzojen Askorbik Asit Uygulamalarının Fotosistem II Aktivitesi Üzerindeki Etkileri. Kahramanmaraş Sütçü İmam Üniversitesi Tarım ve Doğa Dergisi, 24(4), 757-765. https://doi.org/10.18016/ksutarimdoga.vi.732141

Cited By

Effects of different healing agents on acclimatization success of in vitro rooted Garnem (Prunus dulcis × Prunus persica) rootstock

In Vitro Cellular & Developmental Biology - Plant

https://doi.org/10.1007/s11627-024-10420-5

Effects of Exogenous Ascorbic Acid Application on Photosystem II Activity in Cucumber Plants under Salt Stress

Abstract

Keywords

Tuz Stresi Altındaki Hıyar Bitkilerinde Ekzojen Askorbik Asit Uygulamalarının Fotosistem II Aktivitesi Üzerindeki Etkileri

Öz

Anahtar Kelimeler

Kaynakça

Ayrıntılar

Birincil Dil

Konular

Bölüm

Yazarlar

Yayımlanma Tarihi

Gönderilme Tarihi

Kabul Tarihi

Yayımlandığı Sayı

DOI

IZ

Kaynak Göster

Cited By

Effects of different healing agents on acclimatization success of in vitro rooted Garnem (Prunus dulcis × Prunus persica) rootstock

e-ISSN: 2619-9149