Esra Nurten YER ÇELİK, Sezgin AYAN, Mehmet Cengiz BALOĞLU

BAZI KAVAK (POPULUS L.) TAKSONLARININ KADMIYUMA KARŞI FITOEKSTRAKSIYON ROLLERI

Kadmiyum (Cd) ile kontamine olmuş toprakların ıslah başarısı; dokularına Cd birikmesine izin veren bitkilerin seçimine ve kullanımına bağlıdır. Kavak taksonlarının hızlı büyüme, derin kök sistemlerine sahip olma ve kısa rotasyonla işletilebilme özellikleri yeşil ıslah için kullanılmalarına olanak sağlamaktadır. Bu araştırmada; altı kavak taksonu/klonu araştırmaya obje olmuştur. Bunlar; Populus alba L. (Akkavak), P. tremula L. (Titrek kavak), P. nigra L. (Karakavak) klon: Geyve ve N03.368A ve melez kavak klonları P. euramericana Dode. Guinier I-214 ve P. deltoides Bartr / Samsun (I-77/51). Kavak taksonlarının yaprak, kök ve dal aksamlarında Cd birikme miktarları Atomik Absorpsiyon Spektrometresi (AAS) cihazı ile belirlenmiştir. Araştırmacılar Cd birikimi yapan bitki dokularını; en çok biriken aksamdan en az birikim yapan doku kısmına doğru; kök> gövde> yapraklar> meyve> tohum olarak sıralamaktadır. Çalışma kapsamında; yaprak örneklerinin analizi sonucunda; P. tremula'da 12,45 ppm miktarında en yüksek Cd miktarı tespit edilirken, minimum kadmiyum birikimi, 0,84 ppm ile P. alba türlerinde tespit edilmiştir. Kök örneklerinin analizinde; en yüksek kadmiyum miktarı 34 ppm miktarıyla P. euramericana I-214'te, en düşük birikim miktarı ise P. alba türünde 4.6 ppm olarak saptanmıştır. Dal örneklerinde ise; en yüksek kadmiyum miktarı 5,54 ppm ile P. deltoides Samsun (I-77/51) klonunda bulunmuştur. Minimum kadmiyum birikimi ise, P. nigra Geyve klonunda 0.44 ppm seviyesinde belirlenmiştir. Ayrıca araştırma sonucuna göre; Kavak taksonlarında sırasıyla en yüksek Cd birikimi yapan dokuların kök, dal ve yaprak olduğu tespit edilmiştir.

Anahtar Kelimeler:

Bitki ıslahı, Ağır metal, Kadmiyum, Kavak klonları, AAS

PHYTOEXTRACTION ROLES OF SOME POPLAR (POPULUS L.) TAXA AGAINST TO CADMIUM

Reclamation success of soils contaminated with cadmium (Cd); It depends on the choice and use of plants that allow the accumulation of Cd to their tissues. The rapid growth of poplar taxa, having deep root systems and being able to operate with short rotation allow them to be used for green breeding. In this study, six poplar taxa were used. They were; P. alba (white poplar), P. tremula (aspen), P. nigra (black poplar) clone: Geyve and N03.368A and hybrid poplar clones; Populus euramericana Dode. Guinier / I-214 and Populus deltoides are Bartr / Samsun (I-77/51). The amount of Cd accumulation in leaf, root and branch parts of poplar taxa was determined by Atomic Absorption Spectrometer (AAS) device. Researchers plant tissues that accumulate Cd; From the most accumulated component to by the least accumulated that as have a respectively; have been listed as root> stem> leaves> fruit> seed. This scope of; as a result of the analysis of leaf tissue samples; the highest amount of cadmium was determined in Populus tremula L. with 12.45 ppm. Minimum cadmium accumulation was determined in Populus alba L. poplar species in the amount of 0.84 ppm. As a result of the analysis of root tissue samples; the highest amount of cadmium was determined in I-214 with 34 ppm. Minimum cadmium accumulation was determined in Populus alba L. poplar species in an amount of 4.6 ppm. As a result of the analysis of branch tissue samples; the highest cadmium amount was found in Samsun (I-77/51) clone with an amount of 5.54 ppm. The minimum cadmium accumulation was determined at Populus nigra L. - Geyve poplar clone at a level of 0.44 ppm. Also; according to the results of the research; It was determined that the tissues with the highest Cd accumulation in poplar taxa, respectively, are roots, branches and leaves.

Keywords:

Plant breeding, Heavy metal, Cadmium, Poplar clones, AAS,

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