HAMURCU, Mehmet Selçuk Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , DEMIRAL, Tijen Harran Üniversitesi - Fen - Edebiyat Fakültesi - Biyoloji Bölümü, Turkey , HAKKI, Erdoğan E. Selçuk Üniversitesi - Ziraat Fakültesi - Tarla Bitkileri Bölümü, Turkey , YORGANCILAR, Mustafa Selçuk Üniversitesi - Ziraat Fakültesi - Tarla Bitkileri Bölümü, Turkey , GEZGIN, Sait Selçuk Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey

The Effect of Boron Toxicity on Physiological Properties of Durum Wheat (Triticum durum) Varieties

31212

Cereals that cover 80% of the agricultural land in Turkey are highly boron sensitive plants. While wheat can tolerate up to 3 mg boron kg^-1 soil, it is adversely affected above this level. In our study, two durum wheat varieties (Kızıltan-91 and Çakmak-79) tolerance of which against boron stress had previously been determined were exposed to different concentrations of boron (0, 25, 250 ve 500 mg B kg^-1) and growth parameters (root and shoot), relative water content, amounts of boron accumulated, proline contents and malondialdehyde contents were examined. Shoot and root growth was adversely affected and plant development was retarded by toxic concentrations of boron. Accumulated boron levels were increased by increased concentrations of boron and relative water contents were decreased with a more prominent decrease in Çakmak-79. Proline contents were enhanced under toxic concentrations of boron with a higher increase in Çakmak-79. MDA contents of Kızıltan- 91 and Çakmak-79 showed difference and lipid peroxidation level in Kızıltan-91 was decreased while it was increased in Çakmak-79 by boron treatments. Çakmak-79 was more adversely affected by boron toxicity than Kızıltan-91.

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Durum wheat , boron toxicity , proline , lipid peroxidation

The Journal Of Ege University Faculty Of Agriculture

553