Root morphological response of two corn inbred lines to salinity stress

Subject Areas : Journal of Plant Ecophysiology

Sh. Majdi ¹ , M. Jami Moeini ² , M. Hokmabadi ³

1 - دانش آموخته دانشگاه آزاد اسلامی واحد سبزوار
2 - استادیار دانشگاه آزاد اسلامی واحد سبزوار
3 - مربی دانشگاه آزاد اسلامی واحد سبزوار

Received: 2014-05-28 Accepted : 2014-05-28 Published : 2013-11-01

Keywords:

Abstract :

Salinity is one of the increasing problems in the world which include the wide area of our country. In response to salinity, multiple morphological, physiological and biochemical changes can be created in plants. This experiment was carried out to investigate the effects of salinity derived from NaCl (0, 50 and 100 mM) on morphological characteristics of two corn inbred lines, MO17 and B73. Experiment was performed using sand culture method at greenhouse of Agricultural Faculty, Islamic Azad University, Sabzevar Branch during 2011-12 growing season. Experimental treatments were replicated three times lied out in a randomized complete block design with factorial arrangement. Results showed that there were significant difference between corn inbred lines for total root volume, total root area, root diameter, root dry weight, root/shoot ratio and root specific weight. MO17 genotype  was superior than B73 in relation to all characteristics. Salinity stress significantly decreased total root volume, root area, root length, root dry weight, shoot dry weight and root/shoot ratio, but increased root diameter and specific root weight. Response of corn inbred lines to salinity stress showed that MO17 inbred line was more sensitive to salinity compared to B73.