Yapraktan Uygulanan Glisin Betainin Kısıtlı Su Stresi Altındaki Avrupa Armutlarına (Pyrus communis L.) Etkisi

Yıl 2023, Cilt: 10 Sayı: 2, 184 - 189, 18.12.2023

Melih Aydınlı , İbrahim Gür , Bahar Türkeli , Mesut Altındal , Cenk Küçükyumuk

https://doi.org/10.51532/meyve.1196872

Öz

Kuraklık stresi, birçok ürün grubunda olduğu gibi bahçe bitkilerinde de yetiştiriciliği kısıtlamaktadır. Yetiştiriciliği sınırlanan türler arasında armut (Pyrus ssp.) gelmektedir. Bitkiler stres faktörlerini dışsal uygulamalar ile kısmen yönetilebilmektedir. Önemli bir ozmolit olan glisin betain, kuraklık stresi gibi olumsuz çevre koşullarında osmotik basıncın düzenlenmesinde katkı sağlamaktadır. Yapılan çalışmada 18lt’lik saksılardaki bir yaşlı Ankara/BA 29 ve Deveci/BA 29 fidanlarına tarla kapasitesinin %50’si (orta stres) ve %25’i (ağır stres) kadar kısıtlı sulama suyu uygulanarak stres oluşturulmuştur. Stres uygulamalarının başında (0. gün) yapraktan 0 mM (kontrol) ve 10 mM glisin betain (GB) uygulamaları yapılmış, bazı morfolojik ve fizyolojik parametreler değerlendirilmiştir. Buna göre zararlanma derecesi stres sonucunda artmış ancak GB uygulamaları daha düşük puanlara sahip olmuşlardır. Membran stabilitesi kontrole kıyasla 10 mM GB uygulamalarında önemli şekilde artmıştır. İlaveten membran stabilitesi üzerine GB konsantrasyonu x stres şiddeti interaksiyonu önemli bulunmuştur. Sonuçlar yapraktan uygulanan glisin betainin kısıtlı su stresi altındaki Avrupa armutlarında oluşan stresi hafifletebileceğini göstermektedir.

Anahtar Kelimeler

Pyrus communis L., su kısıtı, glisin betain, tolerans

Destekleyen Kurum

Meyvecilik Araştırma Enstitüsü Müdürlüğü

Teşekkür

Araştırmanın yürütülmesinde, sera ve laboratuvarlarının kullanılmasına olanak sağlayan Meyvecilik Araştırma Enstitüsü Müdürlüğü’ne teşekkür ederiz.

Effect of Foliar Treatment Glycine Betaine on European Pears (Pyrus communis L.) Under Water-Deficit Stress

Öz

Drought stress restricts the cultivation of horticultural crops, as in many product groups. Pear (Pyrus ssp.) is among these species that cultivation is restricted. Plants can partially manage stress factors with external treatments. Glycine betaine, an important osmolyte, contributes to the regulation of osmotic pressure in adverse environmental conditions such as drought stress. In the study, stress was created by applying limited irrigation water to 50% (medium stress) and 25% (heavy stress) of the field capacity to one-year-old Ankara/BA 29 and Deveci/BA 29 saplings in 18lt pots. At the beginning of the stress treatments (day 0), 0 mM (control) and 10 mM glycine betaine (GB) were applied to the leaves, and some morphological and physiological parameters were evaluated. Accordingly, the degree of injury increased as a result of stress, but GB treatments had lower scores. Membrane stability increased significantly in 10 mM GB treatments compared to the control. Additionally, the interaction of GB concentration x stress intensity was found to be important on membrane stability. The results show that foliar treatment of glycine betaine can alleviate stress in European pears under water-deficit stress.

Anahtar Kelimeler

Pyrus communis L., water-deficit, glycine betaine, tolerance

Kaynakça

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