تاثير تنش غرقابي بر رشد ريشه و اندام هاي هوايي ژنوتيپ هاي نخود Cicer arietinum L)

Effects of water logging on root and shoot growth of chickpea genotypes (Cicer arietinum L.)

The effects of water logging on root and shoot growth of chickpea genotypes; including Flip 97-530 (Kabuli) and Rupali (Desi) were examined in Research Glasshouse at CSIRO, Perth, Western Australia (WA.) During 2005. Glass wall root growth boxes (0.1><0.24xl.0m) were used as experimental units. Data were analyzed based on Randomized Complete Block Design with three replications. Water loggings were induced when the first root reached to 50 cm. The water level was maintained on the surface for 12 days. After that, water was removed by draining the root growth boxes. Results shoed that leaf area and shoot biomass were significantly decreased by water logging, but differences between genotypes were not significant. Root biomass significantly decreased in water logging treatment. In water logging condition, more than 86% of root biomass belonged to 0-20 cm layer of soil surface and less than 14% belonged to 20-40 cm, while in control condition, more than 85% of root biomass was located in 0-40 cm layer and less than 15% belonged to lower layers (deeper than 40 cm). Flip 97-530 had more root biomass than Rupali genotype in both control and water logging treatments. Nodules activities were stopped during water logging, but after that, dramatically increased in a way that, there were no significant in number and weight of nodules per plant on water logging and control treatment.