Effects of Exegenous Glycine Betaine Treatments on Growth and Some Physiological Characteristics of Tomato under Salt Stress Condition

Year 2019, Volume: 50 Issue: 2, 153 - 158, 28.05.2019

Cüneyt Civelek Ertan Yıldırım

https://doi.org/10.17097/ataunizfd.520407

Abstract

The effects of the exogenous foliar application
of glycine betaine (GB) with different doses (0, 5, 10 and 20 mM) on plant
growth, chlorophyll content, stomatal conductance, phenolic and proline
contents in tomato grown under salt stress were evaluated. Tomato plants (Lycopersicon
esculentum Mill.) were imposed to salinity stress for 2 months with
75 mM NaCl. Salt stress reduced the growth, chlorophyll reading values and
stomatal conductance in tomato. GB application decreased the inhibation of salt
stress on tomato plant growth, and increased stomatal conductivity and
chlorophyll content. The effective dose of GB was 10 mM to increase tolerance
against salt stress. Plant height significantly increased in 5, 10 and 20 mM GB
treatments by 2.2, 13.1 and 18.9%, respectively compared to the control. 5 and
10 mM GB treatments significantly increased chlorophyll reading values (51.18
and 53.44, respectively) compared with control (48.92). 10 mM GB exhibited a rapid
increase in stomatal conductivity by 11.3% compared with control. Moreover, 10
mM GB showed an increase in proline content by 53.4% compared with control.
According to results of our study, it can be suggested that exogenous GB treatments
could mitigate the deleterious effects of salt stress in tomato.

Keywords

Glycine betaine, Plant tolerance, Salt stress, Tomato

Glisin Betain Uygulamalarının Tuz Stresi Altında Domatesin Bazı Büyüme ve Fizyolojik Özellikleri Üzerine Etkisi

Abstract

Çalışmada, farklı dozlarda (0, 5, 10 ve 20 mM) yapraktan glisin betainin (GB)
uygulamasının tuz stresi altında yetiştirilen domateslerde bitki büyümesi,
klorofil içeriği, stoma iletkenliği, fenolik ve prolin içeriği üzerindeki
etkileri değerlendirilmiştir. Bu amaçla, domates bitkileri (Lycopersicon esculentum Mill.), 2 ay
boyunca 75 mM NaCl ile tuzluluk stresine maruz bırakılmıştır. Tuz stresinin,
büyüme parametrelerinde, klorofil içeriğinde ve stoma iletkenliğinde belirgin
bir düşüşe yol açtığı tespit edilmiştir. GB uygulaması, domates bitkisinin
büyümesi üzerine tuz stresinin engelleyici etkisini azaltarak, stoma
iletkenliğinin ve klorofil içeriğinin artmasına neden olmuştur. Tuz stresine
karşı toleransı artırmada en etkili GB dozunun 10 mM olduğu belirlenmiştir. Bitki
boyu 5, 10 ve 20 mM GB uygulamalarında kontrol grubuna göre sırasıyla % 2.2, % 13.1
ve % 18.9 oranında artmıştır. 5 ve 10 mM GB uygulamaları, klorofil değerlerini
(sırasıyla 51.18 ve 53.44) kontrole kıyasla önemli derecede artırmıştır (48.92).
10 mM GB, stoma iletkenliğinde kontrol ile karşılaştırıldığında % 11.3 oranında
bir artış göstermiştir. Ayrıca, 10 mM GB, prolin içeriğini kontrole kıyasla %
53.4 artırdığı saptanmıştır. Çalışmamızın sonuçlarına göre, GB uygulamasının,
tuzluluk koşullarında büyümeyi arttırmak için domates üretiminde faydalı bir
uygulama olabileceği sonucuna varılmıştır.

Keywords

Glisin betain, Bitki toleransı, Tuz stresi, Domates

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