COMPARATIVE PHYSIOLOGICAL STUDIES ON SOME WHEAT (Triticum aestivum, L.) CULTIVARS UNDER SALINE CONDITION DURING GERMINATION AND SEEDLING STAGE | ||||
| Journal of Plant Production | ||||
| Article 5, Volume 3, Issue 1, January 2012, Page 59-74 PDF (668.34 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2012.84028 | ||||
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| Author | ||||
| M. A. M. Elhamahmy* | ||||
| Botany Dept., Faculty of Agric., Suez Canal Univ., 41522 Ismailia, Egypt | ||||
| Abstract | ||||
| The effect of NaCl-salinity (0, 8, 12 dsm-1) on germination, as well as seedlings growth and their components from water status, chlorophyll, proline, reducing sugars, Na+, K+, indole acetic acid (I.A.A) and I.A.A. oxidase activity, in three wheat cultivars (cvs), denoted Sakha 94, Masr 1 and seds 12 were investigated. Data indicated that, although 100% of all three cultivars caryopsis was germinated during 48h under all salinity levels; growth behavior of the seedlings showed different responses during the subsequent periods. Also, cv. Sakha 94 appeared more tolerant to high saline level, subsequent by Masr 1 and seds 12. Sakha 94 recorded the maximum values in most vegetative parameters and photosynthetic pigments. Relative water content and osmotic potential were decreased to very low levels accompanied with higher accumulation of K+, K+/Na+ ratio, proline and reducing sugars in the leaves of the same cv. In the sensitive cv (Seds 12), I.A.A.oxidase activity was increased by 1.5-5 folds in leaves and roots which a led to decreases in auxine levels (plant growth activator) in the seedlings contrary to more tolerant cv. Sakha 94. It could be recommended that cv. Sakha 94 was more suitable to cultivate under saline condition and the physiological indicators studied may be used as screening markers of early selection for salt tolerant in wheat cultivars. | ||||
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