Kuraklık Stresinin Bazı Domates GenotiplerindeAntioksidatif Enzim ve Besin Elementi Değişimleri Üzerine Etkileri

Year 2019, Volume: 6 Issue: 1, 71 - 77, 21.01.2019

Yekbun Alp Turgay Kabay

https://doi.org/10.30910/turkjans.515352

Cited By: 4

Abstract

Küresel ısınmayla birlikte su
kaynaklarında ciddi azalmalar meydana gelmiştir. Küresel ısınmanın sonucu
ortaya çıkan kuraklık stresi üretimi büyük oranda etkilemiştir. Kuraklık stresi
verim ve kaliteyi azaltmasının yanı sıra üreticilere de maddi sıkıntılar
yaşatmaktadır. Kuraklık stresinin etkisine bağlı olarak oluşan hasarların en
aza indirgenmesi amacıyla alınacak önlemlerden bir tanesi de kuraklığa tolerant
çeşitlerin belirlenmesidir. Bu nedenle mevcut çalışmada kuraklığa tolerans
gösteren domates genotiplerinin belirlenmesi amaçlanmıştır. Çalışmada üç adet
hibrit, üç adet standart ve üç adet mahalli domates çeşidi kullanılmıştır.  Domates tohumları 1:1 oranında torf + perlit
karışımı içeren 2 litrelik saksılara ekilmiştir. Gerçek yapraklar oluştuktan
sonra fideler, Hoagland besin çözeltisiyle sulama yapılmıştır. Sulama, kontrol
bitkilerinde çalışma bitirilinceye kadar devam ederken, kuraklık uygulanan
bitkilerde ise fide döneminde sulama tamamen kesilmiştir. Sulama kesildikten 12
gün sonra domates genotiplerindekatalaz
(CAT), süperoksitdismutaz (SOD), askorbatperoksidaz (APX), potasyum (K),
kalsiyum (Ca) ve magnezyum (Mg) içeriklerindeki
değişimler
incelenmiştir. Kuraklık stresine tolerant ve
duyarlı domates genotiplerinin belirlenmesinde incelenen bu parametrelerde
bariz farklar oluştuğu gözlemlenmiştir.

Keywords

Antioksidant, besin elementi, kuraklık stresi, Solanum lycopersicum L.

The Effect of Drought Stress on Antioxidative Enzyme and Nutrient Exchange in Some Tomato Genotypes

Abstract

Along with global warming, serious
reductions occurred in water resources. The drought stress resulting from
global warming has greatly affected production. As well as reducing yield and
quality in production, drought also reduces farmer's income. One of the
measures to be taken in order to minimize the damage caused by the effect of
drought stress is to determine the tolerance of the genotypes to drought.
Accordingly, three hybrids varieties, three standards varieties and three
landraces of tomatoes were used in the present study. Tomato seeds were sown in
a 2 liters-pot that contains 1:1 mixture of peat + perlite. After the true
leaves emerged, the seedlings were irrigated with the Hoagland nutrient
solution. While irrigation was carried on the control plants until the end of
the application, irrigation was completely terminated during the seedling
period in the plants that are exposed to drought. 12 days after the irrigation
cut in tomato genotypes, the changes in the level of catalase (CAT), superoxide
dismutase (SOD), ascorbate peroxidase (APX), potassium (K), calcium (Ca) and magnesium were examined. It was observed that there were significant
differences in these parameters examined for the determination of tomato
genotypes that are tolerant and sensitive to drought stress.

Keywords

Antioxidant, nutrient, drought stress, Solanum lycopersicum L.

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