Changes in some morphological traits of two contrast rice (Oryza sativa L.) cultivars in response to salinity
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 22
Abstract
The aim of this research was to assess the changes in some morphological traits in two contrast rice (Oryza sativa L.) cultivars in response to salinity stress. Experiment design was completely randomized design in a factorial arrangement with two genotypes (improved cultivar of Ghaem and traditional cultivar of Sangejo) and four salinity levels (0, 40, 80 and 120 mM NaCl) with three replicates. Salt stress treatments were initiated 16 days after planting. At 16 days after planting or at the 13 stage according to Zadoks method, salt stress treatment was initiated. Morphological traits including leaf length, leaf number and seedling height were measured during the 14-day period after salt stress. Chlorophyll content of leaves was measured using SPAD chlorophyll meter. According to the results, salt stress showed a significant effect (P<0.01) on leaves number, leaf length, seedling height and SPAD value. The leaves number of both cultivars showed a decreasing trend in all salinity treatments. Also, salinity treatments reduced leaf length and plant height, although there was no significant difference between treatments in Ghaem cultivar. SPAD values in both cultivars increased with increasing salinity to 40 mM NaCl and then decreased with more reduction in Ghaem cultivar. In conclusion, it seems that Sangejo cultivar was more tolerant to salt stress as compared to newly released cultivar of Ghaem.
Authors and Affiliations
Mohammad Yaghubi, Ghorbanali Nematzadeh, Hemmatollah Pirdashti, Mostafa Modarresi
Keywords
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