Gal arıları Eucalyptus yapraklarının biyokimyasal kompozisyonunu değiştirir

Abstract

Gal arılarının yaprak biyokimyası üzerindeki etkilerinin belirlenmesi, zarar mekanizmalarının anlaşılmasına katkı sağlayabilir. Çalışma Kuzey Doğu Akdeniz (Tarsus/Mersin/Turkiye) sahil bölgelerindeki okaliptus plantasyonlarında gerçekleştirildi. İki farklı gal arısı (Leptocybe invasa ve Ophelimus maskelli), ile istila edilmiş ve edilmemiş Eucalyptus camaldulensis yapraklarında biyokimyasal analizler yapıldı ve veriler karşılaştırıldı. Yaprakların flavonoid içeriğinde L. invasa istilasında %16,5, O. maskelli istilasında %33,7 azalma belirlendi. Toplam antioksidan kapasite, O. maskelli istilasıyla azaldı ancak L. invasa istilasıyla değişmedi. Bakır iyonu indirgeme kapasitesi, her iki pest istilasında da önemli ölçüde arttı. Askorbik asit, L. invasa istilasında kontrole göre %87 ve O. maskelli istilasında %120 arttı. İstila edilmiş ağaçlardan istila edilmemiş ve istila edilmiş yaprakların süperoksit üretim oranlarının kontrol örneklerinden daha yüksek olduğu bulundu. İstila edilmiş bitkilerin istila edilmiş ve edilmemiş yapraklarının biyokimyasal kompozisyonunda farklılıklar belirlendi. Gal arılarının istilası, okaliptüs yapraklarında süperoksit üretim oranını artırarak oksidatif stresi tetiklemektedir.

Keywords

• Antioksidan
• Böcek pest
• Leptocybe invasa
• Ophelimus maskelli
• Forosentetik pigmentler

Gall wasps change the biochemical composition of Eucalyptus leaves

Abstract

Determining the effects of gall wasps on leaf biochemistry may contribute to the understanding of damage mechanisms. The study was carried out in eucalyptus plantations in the coastal regions of the Northeastern Mediterranean (Tarsus/Mersin/Turkey). Biochemical analyses were performed on Eucalyptus camaldulensis leaves infested and uninfested with two different gall wasps (Leptocybe invasa and Ophelimus maskelli) and the data were compared. The flavonoid content of the leaves reduced 16.5% in leaves infested with L. invasa and 33.7% with O. maskelli. Total antioxidant capacity decreased with O. maskelli infestation but did not change with L. invasa infestation. Copper ion reduction capacity increased significantly with both pest infestations. Ascorbic acid increased by 87% in L. invasa infestation and 120% in O. maskelli infestation compared to control. Superoxide generation rates of noninfested and infested leaves from the infested trees were found to be higher than those of the control samples. Differences in the biochemical composition of infested and non-infested leaves of infested plants were determined. The invasion of gall wasps triggers oxidative stress by increasing the rate of superoxide production in eucalyptus leaves.

Keywords

• antioxidant
• insect pest
• Leptocybe invasa
• Ophelimus maskelli
• Photosynthetic pigments

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