Table 1.
Examples of plant growth-promoting rhizobacteria tested for various crop types.
| PGPR | Plant | Benefits to plant growth | References |
|---|---|---|---|
| Pseudomonas sp. | Green gram | Increased plant dry weight, number of nodules, total chlorophyll content, root/shoot N, P seed protein, and yield. | (Del Carmen Orozco-Mosqueda et al, 2020) |
| Soybean Wheat |
Increased soil enzyme activity, nutrient absorption, and yield | (Kalyani et al., 2008) | |
| Chickpea | An enhanced fresh and dry weight of plants | (Berendsen et al., 2012) | |
| Rice | More ability to control fungal and bacterial pathogens | (Bulgarelli et al., 2012) | |
| Canola | Encouraged growth and cadmium accumulation in plants | (Agler et al., 2016) | |
| Mustard | Improved growth and reduced Cr contents among plants | (Foster, 1988) | |
| Soybean, mung bean, wheat | Promotes growth of plants | (Bertin et al., 2003) | |
| Pseudomonas putida | Mung bean | The ethylene production repressed in treated plant Increase the growth and decreases Pb and Cd uptake |
(Glick, 2012) (Ahemad and Khan, 2012) |
| Lectuca | Enhancement of shoot/root length attained through concentrated inoculants | (Sharma et al., 2011) | |
| Artichoke | PSB along with N fixers increase in shoot length/weight, germination percentage seedling vigor, and reduction in germination time | (Tank and Saraf, 2010) | |
| Pseudomonas aeruginosa | Maize | Endorsed plant growth and helped soil metal utilization, increase Pb and Cr uptake | (Lawongsa et al., 2008) |
| Black gram | Reduced Cd deposition in tissues, widespread rooting, and increased plant growth | (Wu et al., 2015) | |
| Indian mustard and pumpkin | Increased in plant growth, decrease in Cd uptake | (Rajkumar et al., 2006) | |
| Tomato, Okra, African spinach | Increase in Dry weight of tomato, okra, and spinach | (Gupta et al., 2002) | |
| Pseudomonas fluorescens | Alfalfa | Enhanced Fe and Cu movement from root/shoot | (Mayak et al., 1999) |
| Peanut | Increase in pod yield and nodule dry weight | (Lobo et al., 2019) | |
| Soybean | Increased plant growth | (Rekha et al., 2007) | |
| Canola | Protect plants against the inhibitory effects of Cd | (Jahanian et al., 2012) | |
| Maize | Increase of plant growth, height, seed weight, no. of seed/ear, leaf area, shoot dry weight | (Curá et al., 2017) | |
| Azospirillum amazonense | Rice | Grain dry matter deposition, panicle count, and nitrogen buildup at the grain maturity stage all increase | (Sant'anna et al, 2011) |
| Azospirillum brasilense | Common bean | Increase of Root growth in plants | (Adesemoye et al, 2008) |
| Azospirillum lipoferum | Cotton | An increase in soil microorganisms, plant height, and seed production was observed, but no changes in boll weight or staple length. | (Fayez and Daw, 1987) |
| Azotobacter chroococcum | Chinese mustard | Increased plant development and metal toxicity protection for the plant | (Jha, 2017) |
| Azospirillum brasilense | Rice | Increased grain yield | (Gupta et al., 2005) |
| Kluyvera ascorbate | Mustard, Tomato Canola, | Heavy metals reduce plant growth but do not boost metal uptake. | (Safronova et al., 2006) |
| Bradyrhizobium | Green gram | The development traits at all of the studied pesticide dosages (quizalafop-p-ethyl and clodinafop) | (Wani et al., 2007) |
| Soybean and yellow Lupin | Increased biomass, nitrogen content, deposition of metals | (Dell’amico et al, 2008) | |
| Green gram | Increase of nodule number, seed yield, grain protein, root/shoot N at 290 mg Ni/kg soil | (Burd et al., 2000) | |
| Brevundimonas | Canola | Isolated cadmium directly from the solution | (Gholami et al., 2009) |
| Enterobacter cloacae | Canola | Significant increases in root and shoot length were observed. | (Bashan and González, 1999) |
| Klebsiella oxytoca | Maize | Increase of plant growth parameters | (Remans et al., 2008) |
| Enterobacter sakazakii | |||
| Brevibacillus | White clover | Increased plant growth and nutrition and decreased zinc conc. | Anjum et al., 2007) |
| Methylobacterium oryzae, Berkholderia sp. | Tomato | Significant increase in shoot/root length attained through bacterial cells inoculation | (Wu et al., 2006) |
| Sinorhizobium sp. | Brown mustard | Increased the efficacy of Pb | (Thakuria et al., 2004) |
| Bacillus spp | Barley | Increased root/shoot weight | (Dary et al., 2010) |
| Rhizobium sp. | Pea | Increase of the dry matter, nodule numbers, root/shoot nitrogen | (Lugtenberg and Kamilova, 2009) |
| Mycobacterium sp. | Canola | Prevent plant against the inhibitory effects of cadmium | (Wani et al., 2008) |
|
Bacillus sp. Paenibacillus sp. |
Rice | Considerably encouraged the root/shoot growth. | (Robinson et al., 2001) |