Effect of Growth Regulators on Some Physiological Processes of Bean Plants Under Salt Stress

This research was conducted to determine the effects of two biostimulants on some physiological processes such as photosynthesis and transpiration of three bean cultivars under salt stress. This study was carried in 2018 at the USAMV Iasi Romania, under greenhouse condition and the biological material was represented by three bean populations. The application of biostimulants was done every ten days by foliar spraying throughout the vegetation period and one week before flowering it began the application of saline treatments for a 20-day period. We used a saline solution in a concentration of 200 mM. We followed the pods number, the total chlorophyll content using the CCM plus 200 and the stomatal conductance using SC1 leaf porometer. The treated plants with biostimulants were adapted easier to saline stress conditions compared to untreated plants with growth stimulators. Determinations performed have shown that the treatment with biostimulants has proven to be very effective to improve the growth and yields of bean plants by attenuating the soil salinity stress inhibiting effects.