Musa TÜRKER, Ahmet KAZANKAYA, Adnan DOĞAN, Peyami BATTAL, İbrahim YÖRÜK, M. Emre EREZ

Cevizlerde (Juglans regia L.) mevsimsel kambiyal aktivite ile hormonal değişiklikler arasındaki ilişkiler

Cevizlerde (Juglans regia L.) bitkisel hormonlar ile mevsimsel kambiyal farklılaşma arasındaki ilişkilerinin incelendiği bu çalışmada; kambiyumun 3-4 sıra hücreden oluştuğu, kambiyal aktivitenin Haziranın ortalarında başladığı gözlenmiştir. Bahar odunu oluşumu esnasında kambiyum hücrelerinin uzunluğu ve genişliği sırasıyla 12.50 fim ve 4.75 um olduğu tespit edilirken, yaz odunu oluşumu Temmuz'un sonlarında başladığı tespit edilmiştir. Yaz odununda ise kambiyum hücrelerinin uzunluğu ve genişliği sırasıyla 11.50- 5.75 $mu$ m olduğu, bahar odununda en büyük ve küçük trake çapının lümen büyüklüğü 52.25-16.50 $mu$ m olduğu saptanmıştır. Aynı örneklerde en büyük ve en küçük trakeid çapları sırasıyla 18.25-13.50 $mu$ m olarak, yaz odunda en büyük ve en küçük trake çapının lümen büyüklüğü 32.25-10.50 $mu$ m olduğu gözlenmiştir. Aynı örneklerde en büyük ve en küçük trakeid çapları sırasıyla 12.50- 7,25 $mu$ m olarak belirlendi. Bitkisel hormonlardan büyümeyi teşvik eden ve engelleyen indol asetik asit (IAA), gibberellik asit (GAs), zeatin ve absisik asit (ABA) gibi bitkisel hormonların seviyeleri kambiyal aktivite ile uyum göstermiştir.

The relationship between seasonal cambial activity and hormonal changes in walnut (Juglans regia L.) plants

In the present study the hormonal changes in walnut grown in Van province were investigated in connection with seasonal cambial activity. Cambium was determined 3 to 4 cell lines. The cambial activity was started in mid-July. The length and width of cambium cells were measured as 12.50 $mu$ m and 4.75 $mu$ m during spring wood formation, respectively. The summer wood formation was started at the end of July. The length and width of cambium cell in summer wood were measured as 11.50 $mu$ m and 5.75 $mu$ m, respectively. The largest diameter of trache in spring wood was measured as 52.25 $mu$ m, whereas the smallest diameter was 16.50 $mu$ m The tracheid diameter was measured between 13.50 and 18.25 $mu$ m. In summer wood the highest andlowest trache diameter were measured as 32.25 um and 10.50 um, respectively. In the same specimen the tracheid diameter was measured between 7.25 and 12.50 um. The levels of endogenous plant hormones of IndoIe-3-acetic acid (IAA), gibberellic acid (GAs), zeatin and abscisic acid (ABA) were determined by high performance liquid chromatography (HPLC) and the levels of which were found in good harmony with seasonal cambial activity.

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