1. Ahmad F, Ahmad I, Khan MS (2005) Indole acetic acid production by the indigenous isolates of Azotobacter and fluorescent Pseudomonas in the presence and absence of tryptophan. Turk J Biol 29:29–34
2. Arshad M, Frankenberger WT (1998) Plant growth-regulating substances in the rhizosphere: microbial production and functions. Adv Agronom 62:46–152
3. Bakker PAHM, Pierterse CMJ, Van Loon LC (2007) Induced systemic resistance by fluorescent Pseudomonas spp. Phytopathology 9:239–243
4. Banik A, Mukhopadhyay SK, Sahana A, Das D, Dangar TK (2015) Fluorescence resonance energy transfer (FRET) based technique for tracking of endophytic bacteria in rice roots. Biol Fertil Soils. doi: 10.1007/s00374-015-1064-6
5. Bashan Y, de-Bashan LE, Prabhu SR, Hernandez JP (2014) Advances in plant growth-promoting bacterial inoculant technology: formulations and practical perspectives (1998–2013). Plant Soil 378:1–33