Kadmiyum Stresi Altındaki Çilek (Fragaria x ananassa “Camarosa”) Bitkisinde Metil Jasmonat Uygulamalarının Bazı Büyüme Parametreleri Üzerine Etkileri

Öz

Ağır metaller bitki için temel besin maddesi olmayan genellikle toksik etkiye sahip elementlerdirler. Kadmiyum bitki büyüme ve gelişmesini ciddi sınırlandırabilen ve çevreye olumsuz etkileri olduğu iyi bilinen en önemli toksik metallerden biridir. Bitkisel hormonlar, bitki bünyesindeki hormonların üretim, dağıtım veya sinyal çevrimini değiştirerek çevre koşullarına karşı değişen tepkiyi vermesi yanında bitki büyüme ve gelişmesini düzenleyen küçük moleküllerdirler. Jasmonatlar (JAs) birçok ileri bitki süreçlerini düzenlemekte ve olumsuz çevreresel stres faktörlerine karşı bitki savunma mekanizmasında aktif bir rol oynamaktadırlar. Bu çalışmada, ağır metal (kadmiyum) stresinde dışsal metil jasmonat (MeJa) uygulamalarının çilek (Camarosa ) bitkisinde bazı büyüme parametreleri üzerine etkilerinin belirlenmesi hedeflenmiştir. Çalışmada kadmiyum konsantrasyonun artışına paralel olarak çilek bitkisinde incelenen büyüme parametrelerinde düşüş belirlenmiştir. Bununla birlikte, metil jasmonat uygulamalarının kadmiyum toksitesini hafiflettiği ve uygulama dozuna bağlı olarak çilek bitkisinde kök sayısı, kök ağırlığı, gövde ağırlığı ve yaprak alanında artış sağladığı belirlenmiştir. Elde edilen sonuçlar kadmiyum uygulamalarının çilek bitkisinin büyümesi üzerine olumsuz etkilerinin olduğu ve metil jasmonat uygulamalarının ise kadmiyum stresinin azaltılmasında önemli bir rol oynadığı belirlenmiştir.

Anahtar Kelimeler

• Ağır metal toksitesi,kadmiyum,metil jasmonat,çilek

The Effect of Methyl Jasmonate Applications on Some Growth Parameters in Strawberry (Fragaria x ananassa “Camarosa”) Plant under Cadmium Stress

Öz

Heavy metals which are not the essential plant nutrients for plants generally have toxicity effect. Cadmium is one of the most important toxin metals well known to have a negative impact on the environment and can severely limit plant growth and development. Plant hormones are small molecules that regulate plant growth and development, as well as changing the production, distribution or signal cycle of the hormones within the plant, changing the environmental conditions. Jasmonates (JAs) regulate many advanced plant processes and play an active role in plant defense mechanisms against adverse environmental stress. The present study was aim to test the effect of exogenously applied methyl jasmonate (MeJa) on some growth parameters of strawberry (Camarosa cv.) plant exposed to heavy metal (Cd) stress. In study, growth parameter of the strawberry plant was decreased parallel with the application of increasing concentrations of Cd. On the other hand, exogenously applied of methyl jasmonate was modify of cadmium toxicity and root number, root weight, body weight, and leaf weight rose with depending on methyl Jasmonate dose. The results presented in this work suggested that Cd treatments have a negative effect on growth and methyl jasmonate apply plays an important role in the strawberry decreasing to cadmium stress.

Anahtar Kelimeler

• Heavy metal toxicity,cadmium,Methyl Jasmonate,strawberry

Kaynakça

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