Response of Winter Wheat (Triticum aestivum L.) to Selected Biostimulants under Drought Conditions

To prevent the staggering degradation of environment, restrictions in use plant protection products and fertilizers are being strengthened every year. Therefore, methods for improving tolerance to unfavorable environmental conditions sought positively affect both plants natural environment. Here, we evaluated compared efficacy four commercial biostimulants on winter wheat drought stress. The effects following biological agents: Bacillus sp., soil bacterial strains, free amino acids, humic substances were assessed a pot experiment under full hydration moisture drought. Among studied biostimulants, two based strains had strongest beneficial In treated with either these two, highest level CO2 assimilation was recorded Moreover, same plants, decrease transpiration value due smallest. stomatal conductance also noted plants. results chlorophyll fluorescence indicate smallest damage photosynthetic apparatus which used. Under drought, lowest initial values preparations, as maximum fluorescence. On other hand, parameter indicating stress reduced all except those one preparations. Another showing efficiency light photons photosynthesis process increased only whereas it decreased observed most effective work such by fastest transport electrons through photosystems Additionally, grain yield obtained resistance index indicated that among tested formulations, preparations scored best. is recommended comparative studies field, help combat drought-related losses wheat.