Rhizome rot of turmeric caused by Pythium aphanidermatum is a major threat to turmeric-cultivating areas of India. This study intends to evaluate the performance of fluorescent pseudomonads against Rhizome rot disease and understand the resistance mechanism in Turmeric plants. Fluorescent pseudomonads were screened against Pythium aphanidermatum using dual culture. Selected strains were evaluated for the performance of growth promoting attributes and the presence of antibiotic genes through PCR analysis. Strain FP7 recorded the maximum percent inhibition of P. aphanidermatum under in vitro conditions. Strains FP7 and TPF54 both increased plant growth in turmeric plants in vitro. Strain FP7 alone contained all the evaluated antibiotic biosynthetic genes. Talc and liquid-based formulations were prepared with effective strain and tested for its biocontrol activities under both glasshouse and field conditions. Enzymatic activities of the induced defense enzymes such as PO, PPO, PAL, CAT and SOD were estimated and subjected to spectrophotometric analysis. A combination of rhizome dip and soil drench of FP7 liquid formulation treatment remarkably recorded the minimum disease incidence, higher defense enzymes, maximum plant growth and yield under glasshouse and field conditions. Application of strain FP7 increased the defense molecules, plant growth and yield in turmeric plants thereby reducing the incidence of rhizome rot disease. Moreover, this study has a potential to be adopted for sustainable and eco-friendly turmeric production.

瓜果腐霉引起的姜黄根茎腐烂是对印度姜黄种植地区的主要威胁。这项研究旨在评估荧光假单胞菌对根茎腐烂病的表现，并了解姜黄植物的抗性机制。使用双重培养筛选荧光假单胞菌对瓜果腐霉。通过PCR分析评估所选菌株的生长促进特性和抗生素基因的存在。FP7菌株在体外条件下记录了对P. aphanidermatum的最大抑制百分比。菌株FP7和TPF54均可提高姜黄植物的体外植物生长。仅菌株FP7包含所有评估的抗生素生物合成基因。制备具有有效应变的滑石粉和液体制剂，并测试其在温室和田间条件下的生物防治活性。估计诱导的防御酶如PO，PPO，PAL，CAT和SOD的酶活性，并进行分光光度分析。根茎浸入和FP7液体制剂处理的土壤浸水的结合显着记录了在温室和田间条件下的最小病害发生率，更高的防御酶，最大的植物生长和产量。FP7菌株的应用增加了姜黄植物中的防御分子，植物生长和产量，从而减少了根茎腐烂病的发生。而且，