تقييـم أداء أصنـاف مـن القمـح الصلب (Triticum durum Desf) لتحمـل الإجهـاد الملحي فـي مرحلة النمو الخضري

Abstract

This experiment was conducted to evaluate the tolerance of nine durum wheat Triticum durum Desf genotypes during the vegetative growth stage. The experiment was designed as a randomized complete design (RCD) with four replications. Wheat genotypes were treated with different concentrations of salinity (0 control), 50, 100, and 150mM NaCl. The results showed that salt stress caused a significant decrease in plant growth traits of wheat genotypes. Also, the results indicated that some wheat genotypes were able to maintain good growth under salinity conditions. The study showed that plant height, number of branches, number of leaves, fresh and dry weight of the shoot and root, as well as the length of the root, were significantly reduced due to salinity stress, especially at the high concentrations of salinity (100, 150 mmol of NaCl). The effect of salinity was more severe on roots’ length, number of branches and number of leaves per plant. This decrease was more pronounced in some wheat genotypes such as Al-Qarah, Al-Naama, Marjawi, and Al-Karam compared to other genotypes. The study showed that among the nine hard wheat genotypes included in this study, the genotypes Abu AlShouk, Jalil Edeeb, and Humira were the most tolerant genotypes to salinity while the genotypes Al-Qarah, Al-Naama, Marjawi, and Al-Karam were the most sensitive genotypes to salt stress. The study concluded that the effect of salinity on different growth characteristics of wheat plant varies with different wheat genotypes. More researches are needed to obtain accurate results under field conditions and for different stages of plant growth.