Authors : Tejas Kanase1,and Arti Guhey
Page Nos : 21-25
Description :
Drought stress is a major constraint to the production and yield stability of soybean [Glycine max(L.) Merr.]. Superior root phenotypes are currently considered to be key to improved drought tolerance characteristics that allow better plant performance through more efficient water uptake in crops such as soybean.A quantitative characterization of root parameters is currently being attempted for various reasons. Non-destructive, rapid analyses of root system are difficult to perform due to the hidden nature of the root. Hence, improved methods to measure root traits are necessary to support knowledge based plant physiology and to analyse root growth responses to drought stress. Here,we conducted a minirizotrone study to investigate drought stress tolerance soybean genotypes. The dynamic parameters of root traits associated with maintaining plant productivity under drought include root length, surface area, average diameter, root volume, number of tips, number of forks and number of crossings.A new technique has been established for non-destructive root growth studies and quantification of root traits. However, automation of the scanning process and appropriate software remains the bottleneck for high throughput analysis. The JS9752 (2.22) possessed the higher root volume though did not vary significantly with KDS344 (0.99). JS9752(455.03) and JS334 (450.31) recorded the significantly higher analysed region area. JS9752 (0.32) and CGSOYA(0.29) noted the significantly higher and MACS1188 (0.23) lower average diameter of root.These findings demonstrate that root phenotyping using minirhizotron that are easy-to-apply under drought conditions can be used to determine genotypic differences in drought tolerance in soybean.
