YIELD AND PROLINE CONTENT OF FABA BEAN GENOTYPES UNDER WATER STRESS TREATMENTS - H. M. Migdadi; E. H. El-Harty; A. Salamh; M. A. Khan (Journal of Animal and Plant Sciences, 2016)
Drought stress is one of the most serious problems for agriculture production and sustainability.This study was carried out to investigate seed yield and its components in addition to estimate free proline content in leaves of nine faba bean genotypes with different types grown under three water regimes (well-watered, mild and severe drought). A field experiment was laid out in split plot with three replications during two growing seasons, 2013/14 and 2014/15. The results indicated that drought had pronounce negative effects on yield and its components for all faba bean yield characters, while the effect was positive with leaves proline content. Hassawi 2 out yielded all genotypes under all water treatments and was followed by Giza 843 and ILB 1814 under well irrigation and by Giza Blanka and Giza 843 under high drought stress. Furthermore Hassawi 2 and Giza Blanka showed higher drought tolerance efficiency (42.3 and 39.5), less drought stress susceptibility index (0.6) and minimum reduction in seed yield 58.3 and 60.4%, respectively. Proline content ranged from 46.3μg/g for Gazira 2 to 69.7 for ILB 1814 under well-watered and from 89.8 for Kamline to 264.0 for Gazira 1 under severe drought. Proline content and seed yield/plant negatively correlated (r= -0.65**) over all treatments and was insignificant under both well-watered (r= 0.62) and high drought stress (r= 0.43). To a limit, results indicated that proline content could be used as an indication toward selection for drought tolerant genotype.
Keywords: journal article; Faba bean; Water regimes; Proline; Tolerance; Seed yield