In this study, we have attempted to develop a plant growth promoting rhizobacteria (PGPR) consortia against early-stage diseases in Arachis hypogaea (Groundnut crop) plantation of Andhra Pradesh, India. The dominant PGPRs were selected by considering the various plant growth and protection qualities, followed by characterisation and grouping based on compatibility to form a consortium of PGPRs [Group-1 includes EX-1 (Acinetobacter baumannii stain HAMBI 1846); EX-3 (Pseudomonas aeruginosa strain A1K319); EX-5 (Bacillus subterraneus strain CF1.9); KNL-1 (Bacillus subtilis strain JMP-B); CTR-4 (Enterobacter cloacae strain VITKJ1); ANT-4 (Bacillus subtilis strain SBMP4) and Group-2 includes EX-4 (Pseudomonas otitidis strain SLC8); KDP-4 (Pseudomonas aeruginosa strain Kasamber 11); NLR-4 (Bacillus species ADMK68); ANT-6 (Bacillus subtilis subsp. inaquosorum strain KCTC 13429)]. In addition to resistance to early stage pathogens, in both in vitro and pot experiments the PGPR consortium showed significantly higher germination rate and root induction (Aspergillus niger; A. flavus; Fusarium oxysporum) when compared to control and fertilizer treated groups. In addition, Group 2 was more successful in stimulating and protecting plant growth among the two groups of PGPRs developed. The PGPR consortia developed showed multiple plant growth characteristics, including phosphate solubilization, production of HCN and Indole acetic acid along with broad antagonism against the tested phytopathogens.

在这项研究中，我们试图在印度安得拉邦的花生（花生）种植园中开发一种针对早期疾病的促进根际细菌（PGPR）的植物生长联盟。通过考虑各种植物的生长和保护品质来选择主要的PGPR，然后根据相容性进行表征和分组以形成PGPR财团[ Group-1包括EX-1（鲍曼不动杆菌染色HAMBI 1846）；EX-3（铜绿假单胞菌菌株A1K319）; EX-5（地下芽孢杆菌CF1.9）; KNL-1（枯草芽孢杆菌菌株JMP-B）; CTR-4（阴沟肠杆菌菌株VITKJ1）; ANT-4（枯草芽孢杆菌菌株SBMP4）和Group-2包括EX-4（耳假单胞菌菌株SLC8）; KDP-4（铜绿假单胞菌菌株Kasamber 11）; NLR-4（芽孢杆菌属ADMK68）; ANT-6（枯草芽孢杆菌亚种亚种（Aaquosorum）菌株KCTC 13429）。除了对早期病原体具有抗性外，在体外和盆栽实验中，PGPR联盟还显示出更高的发芽率和根系诱导能力（黑曲霉；黄曲霉；尖孢镰刀菌））与对照组和施肥组比较。另外，在两组PGPR之间，第2组在刺激和保护植物生长方面更为成功。PGPR联合体显示出多种植物生长特征，包括磷酸盐增溶，HCN和吲哚乙酸的生产以及对被测植物病原体的广泛拮抗作用。