Strigalakton Uygulamalarının Bitkilerde Abiyotik Stres Şartlarına Toleransı Artırmadaki Etkileri

Öz

Abiyotik stres, belirli bir ortamda herhangi bir abiyotik faktörün bitki üzerindeki olumsuz etkisi olup bitkilerin büyümesini ve gelişimini etkiler. Kuraklık, tuzluluk ve aşırı sıcaklıklar gibi stres faktörleri genellikle birbirleriyle ilişkilidir veya birlikte bulunur. Tarımsal üretimin azalmasında büyük oranda abiyotik stres, daha düşük oranlarda ise diğer stres faktörleri etkilidir. Abiyotik stres faktörleri olarak, kuraklık, tuzluluk, yüksek ve düşük sıcaklık, sel, radyasyon, ağır metaller, oksidatif stres, rüzgâr, besin maddesi eksikliği gibi faktörler sayılabilir ve bu stres kaynakları bitki gelişimini, kaliteyi ve verimliliği olumsuz yönde etkilemektedir. Abiyotik stresler gibi çevresel stresler altında bitki büyümesini ve üretkenliği en üst düzeye çıkarmak için çeşitli stratejiler kullanılmaktadır. Alternatif ve teknik olarak daha basit bir yaklaşım, belirli bitki büyümesini düzenleyici bileşiklerin eksojen uygulaması yoluyla toleransı indüklemektir. Son yıllarda, strigalaktonlar (SL) bitkinin abiyotik streslere verdiği tepki boyunca çok sayıda fizyolojik ve moleküler yolu düzenlemedeki temel rolleri nedeniyle büyük ilgi görmüştür. Bu çalışmada, tuzluluk, kuraklık, yüksek sıcaklık ve ağır metal stresi gibi bazı abiyotik stres koşullarında yetiştirilen bitkilerde SL uygulamalarının etkileri tartışılmıştır.

Anahtar Kelimeler

• Abiyotik stres
• Strigalakton
• Tolerans
• Verim

Effects of Strigalactone Applications on Increasing Tolerance to Abiotic Stress Conditions in Plants

Abstract

Abiotic stress is the adverse effect of any abiotic factor on plants in a given environment and affects the growth and development of plants. These stress factors such as drought, salinity and extreme temperatures are usually associated with each other or coexist. Abiotic stress is largely responsible for the decrease in agricultural production, while other stress factors are less effective. Abiotic stress factors include drought, salinity, high and low temperature, flooding, radiation, heavy metals, oxidative stress, wind and nutrient deficiency, and these stress sources negatively affect plant development, quality and productivity. Various strategies are used to maximize plant growth and productivity under environmental stresses such as abiotic stresses. An alternative and technically simpler approach is to induce tolerance through exogenous application of specific plant growth regulator compounds. In recent years, strigalactone (SL) have attracted great attention due to their essential roles in regulating numerous physiological and molecular pathways during the plant response to abiotic stresses. In this study, the effects of SLs applications on plants grown under some abiotic stress conditions such as salinity, drought, high temperature and heavy metal stress are discussed.

Keywords

• Abiotic stress
• Plant growth
• Nitric oxide
• Tolerance

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