Table 1.
Overview of studies reporting the effect of root exudates from different plant species on various rhizosphere microbes
| Plant species | Metabolite/whole exudate | Effect (±) | Rhizosphere microorganism | Reference |
|---|---|---|---|---|
| Alfalfa (M. sativa) | 7,4′-Dihydroxyflavone and naringenin | + | Acidobacteria | Szoboszlay et al. (2016) |
| Arabidopsis (A. thaliana) | Phytochemical extracts from root exudates | + | Microbiome | Badri et al. (2013) |
| Arabidopsis | Malic acid | + | B. subtilis FB17 | Rudrappa et al. (2008) |
| Arabidopsis | Scopoletin | − | F. oxysporum and V. dahliae | Stringlis et al. (2018) |
| Arabidopsis | Sideretin and fraxetin | − | Pseudomonas sp. Root329 | Voges et al. (2019) |
| Arabidopsis | Thalianin, thalianyl fatty acid esters, and arabidin | + | Proteobacteria | Huang et al. (2019) |
| − | Actinobacteria | |||
| Arabidopsis | Camalexin | + | Pseudomonas sp. CH267 | Koprivova et al. (2019) |
| Arabidopsis and alfalfa | Whole exudate effect | ± | Fungal community | Broeckling et al. (2008) |
| Arabidopsis abcg30 mutant | Whole exudate effect | + | Microbiome analysis (e.g. Bradyrhizobium) | Badri et al. (2009) |
| Arabidopsis myc2 and med25 mutants | Whole exudate effect | + | Microbiome analysis (Streptomyces, Bacillus, and Lysinibacillus) | Carvalhais et al. (2015) |
| Banana (Musa acuminata) | Malic and fumaric acids | + | B. amyloliquefaciens NJN-6 | Yuan et al. (2015) |
| Chinese tallow (Triadica sebifera) | Flavonoid | + | AM fungi | Tian et al. (2021) |
| Eucalyptus globulus ssp. Bicostata | Rutin | + | Pisolithus | Lagrange et al. (2001) |
| Common bean (Phaseolus vulgaris) | Flavonoid | + | Rhizobium leguminosarum | Aguilar et al. (1988) |
| Maize (Z. mays) | Benzoxazinoids | − | Flavobacteriaceae and Comamonadaceae | Cadot et al. (2021) |
| Maize | 2,4-Dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one | + | P. putida KT2440 | Neal et al. (2012) |
| Maize | (6R)-7,8-Dihydro- 3-oxo-ionone and (6R; 9R)-7,8-dihydro-3-oxo-ionol | − | F. oxysporum f. sp. melongenae | Park et al. (2004) |
| Maize | Flavones | + | Oxalobacteraceae | Yu et al. (2021) |
| Maize | Whole exudate effect | + | B. amyloliquefaciens SQR9 | Zhang et al. (2015) |
| Peanut (Arachis hypogaea) | Alanine and other amino acids | + | F. oxysporum and F. solani | Li et al. (2013) |
| Pine (Pinus radiata) | Quinic, lactic, maleic acids | + | Microbiome | Shi et al. (2011) |
| Potato (Solanum tuberosum) | Tyramine and other amino acids | + | S. subterranean | Balendres et al. (2016) |
| Sand Sedge (Carex arenaria) | Volatile | + | Soil bacteria | Schulz-Bohm et al. (2018) |
| Sugarbeet (Beta vulgaris) | Whole exudate effect | + | P. aeruginosa PA01 | Mark et al. (2005) |
| Tobacco | Whole exudate effect | + | Paenibacillus elgii | Das et al. (2010) |
| Tomato (S. lycopersicum) | α-Tomatine | + | Sphingomonadaceae | Nakayasu et al. (2021) |
| Tomato | Whole exudate effect | + | F. oxysporum f. sp. lycopersici | Scheffknecht et al. (2006) |
| Tomato | Whole exudate effect | + | Pseudomonas spp. | Kravchenko et al. (2003) |
| Tomato and cucumber (Cucumis sativus) | Citric acid | + | Pseudomonas fluorescens PCL1751, P. fluorescens PCL1753, Pantoea agglomerans PCA0067, and Aeromonas hydrophila PCA0081 | Kamilova et al. (2006) |
| Watermelon (Citrullus lanatus) | Chlorogenic acid | − | F. oxysporum f. sp. niveum | Ling et al. (2013) |
| Watermelon | Cinnamic acid | + | F. oxysporum f. sp. niveum | Ling et al. (2011) |
| Wild oat (Avena barbata) | Organic acids nicotinic, shikimic, salicylic, cinnamic and IAA | + | Microbacterium HA36, Flavobacterium HB58 and Cellulomonas HD24 | Zhalnina et al. (2018) |