Ascochyta Yanıklığı Ascochyta rabiei Pass. Labr. 'na Dayanımları Farklı Nohut Çeşitlerinde Oransal Su, Kuru Madde ve Prolin Miktarlarındaki Değişimler

Bu çal ışmada, Ascochyta Yan ı kl ığı hastal ığı n ı n çı kma şiddetine bağ l ı olarak meydana gelen hastal ığ a duyarl ı , Can ı tez 87 ve dayan ı kl ı , ILC 195 nohut çeşitlerinin yapraklar ı nda hastal ı k stresinin Oransal Su içeri ğ i % O. S. İ . , kuru maddeye % K..M. etkisi ile ayn ı çeşitlerin yaprak, gövde ve köklerinde de ğ işen prolin miktarlar ı incelenmi ştir. Duyarl ı çeşide ait yapraklarda %O. S. İ . dayan ı kl ı çeşide ait yapraklardan daha yüksektir. Her iki nohut çe şidinin enfekteli yapraklar ı nda da % 0.S.I.' nin daha az oldu ğ u bulunmuştur. Her iki çeşidin enfekteli yapraklar ı nda 8. günde kuru madde % K.. M. 'de art ış olduğu tespit edilmiştir. Prolin miktar ı yapraklarda , gövde ve köklerden daha fazla bulunmuştur. Enfekteli bitkilerde su eksikli ğine bağl ı olarak prolin miktar ı nda art ış her iki nohut çeş idinde de tespit edilmiştir. Hastal ığı n ortaya ç ı kmas ı na bağl ı olarak duyarl ı çeşitte en fazla prolin 8. günde bulunurken dayan ı kl ı çeş itte 11. günde daha fazla prolin birikimi oldu ğu tespit edilmiştir. Hastal ığı n ç ı kma şiddetine bağ l ı olarak prolin miktar ı n ı n değişimi Ascochyta Yan ı kl ığı na karşı dayan ı mda belirleyici bir parametre olabilir.

Anahtar Kelimeler:

Nohut, Ascochyta rabiei , oransal su içeriği, kuru madde, prolin

Changes in the Relative Water Content, Dry Matter and Proline Amount in the Ascochyta Blight Ascochyta rabiei Pass. Labr. Resistant and Susceptible Chickpea Cultivars

In this study, the effect of Ascochyta blight Ascochyta rabiei Pass. Labr. disease stress on the relative water content RWC % and dry matter D. W % content of susceptible Can ı tez 87 and resistant ILC 195 cultivars were investigated. Proline amount alternations in the leaves, stems and roots of the same cultivars were also studied. RWC % was higher in the leaves of susceptible cultivar than of resistant cultivar. RWC % was found to be less in both cultivar leaves which were infected. The amount of dry matter content increased in the infected leaves of both cultivars in the 8 thday. The amount of proline was higher in leaves than stems and roots. In infected resistant and susceptible cultivars the amount of proline increased as the water content decreased. In susceptible cultivar the amount of proline was found to be highest in the 8 thday, however, the amount of proline accumulation was higher than 11 th day. The changes in the amount of proline could be a determinative factor in resistance to the disease.

Keywords:

Chickpea, Ascochyta rabiei , relative water content, dry matter, prolin,

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