Comparative Evaluation of Paclobutrazol and Rhizobacterium Variovorax sp. YNA59 Effects on Mitigating Drought Stress in Chinese Cabbage (Brassica rapa ssp. Pekinensis)

Drought has severely impacted worldwide agricultural land, resulting in substantial yield loss and abiotic pressures crops such as Chinese cabbage. Paclobutrazol (PBZ) plant growth-stimulating bacteria have been extensively recommended to reduce a variety of stresses crops. Considering these facts, we used PBZ rhizobacterium Variovorax sp. YNA59, microbe with potential qualities, cabbage under drought stress non-stressed conditions, observed their impacts on morphological physiological attributes. Our findings revealed considerable improvement total biomass growth after treatment YNA59 (28%) (8%) conditions. In contrast, negative results were normal suppressing reducing biomass. The increase parameters, chlorophyll content, relative water photochemical efficiencies PS II, YNA59-treated plants, followed by PBZ, especially drought. Furthermore, significantly increased the endogenous phytohormone abscisic acid level, whereas inoculations decreased it. Antioxidant analysis that YNA glutathione catalase polyphenol oxidase peroxidase levels. These suggested could be more significant for conferring than PBZ.