Impact of Light, Dark and Salinity on Seed Germination and/or Growth Criteria of Common Bean Seedlings

Abstract

The principal objective of this investigation was to explore novel methodologies with the potential to enhance the germination quality of the common bean, thereby contributing to advancements in agricultural practices and seed germination techniques. Light, dark and salinity has a potential to improve germination of common bean. Accordingly, a laboratory experiment was conducted to investigate the influence of the aforementioned factors on SG and seedling growth parameters, encompassing root and shoot lengths, as well as fresh and dry weights, of the common bean. This investigation involved subjecting the seeds to diverse alternating light, dark, and salinity treatments to discern their effects on both germination rates and subsequent seedling vigor and development. The obtained results showed that seed germination (%) at light conditions was 75.1% and the mean time to germination (MTG) was 17.9. while in the dark conditions, the seed germination was 97.1% and mean time to germination was 24.8. on the other hand, SG and MTG decreased with increasing salinity stress. Moreover, NaCl salt reduced the root and shoot lengths. The highest reduction of root and shoot lengths were 42.20 % and 62.10% compared with control resulted from the highest NaCl concentration (128 mM). The fresh and dry weights appeared the same trend due to increasing of NaCl levels. The reduction (%) in fresh and dry weights was 37.7 % and 43.3 % with 128 mM NaCl treatment relative to untreated treatment. It can be concluded that light, dark and salinity led to varied responses on SG and other characters studied regarding improvements or inhibitions common bean growth. The current study established a successful approach for optimizing SG of common bean that could be utilize for their large-scale production. Future studies must be conducted on bean plants to determine the best treatments that lead to the best results for the germination, growth and productivity