Table A1.
Reports on compounds affected in our study, in relation to plant response to stress and/or interaction with PGP bacteria.
| Metabolite | Stress | Plant | PGP Bacteria Interaction |
Role(s) |
|---|---|---|---|---|
| Aminocaproic acid | salinity | barley [85] | no | unknown |
| Campesterol | low temperature | rice [86,87], Maize [88] | no | brassinosteroids precursor |
| Campesterol | microbial attack | rice [27], barley [25] | no | brassinolide precursor |
| Diethylene glycol | Pb toxicity | Sedum alfredii [89] | no | unknown |
| Diethylene glycol | drought | Nicotiana benthamiana [90] | no | unknown |
| Glycerol-3-phosphate | pathogen attack | wheat [91] | no | systemic acquired resistance induction |
| Hexacosanol | pathogen attack | Asterids [92,93] | no | unknown |
| Hexacosanol | pathogen attack | A. thaliana [23] | no | wax barriers formation |
| Malic acid | P deficiency | wheat [40], barley [5], maize [94] | no | substrate P mobilization |
| Pantothenic acid | waterlogging | cucumber [95] | no | unknown |
| Pantothenic acid | drought | sorghum [96] | no | unknown |
| Pentonic acid, 1,4-lactone | low temperature | A. thaliana [97] | no | unknown |
| Pentonic acid, 1,4-lactone | P deficiency | Camelia sinensis [49] | no | unknown |
| Putrescine | P deficiency | rice [98] | no | growth inhibition |
| Pyroglutamic acid | no |
Lolium multiflorum [99], tomato [100] |
Pseudomonas putida [99], Pseudomonas fluorescens [100] | C source for PGP bacteria [99], bacterial chemotaxis [100] |
| Pyroglutamic acid | drought | lettuce [101] | no | photosynthetic rate improvement, ROS scavenging |
| Ribonic acid | no | sugarcane [102] | Herbaspirillum seropedicae, Gluconacetobacter diazotrophicus | unknown |
| Ribonic acid | P deficiency | Camelia sinensis [49], oat [103] | no | unknown |
| Serotonin | nutrient deficiency | rice [50] | no | ROS scavenging, nutrient recycling |
| Serotonin | no | barley [104] | no | auxin metabolism modification |
| Sinapic acid | pathogen attack | Aegilops variabilis [44] | no | unknown |
| Sinapic acid | no | wheat [43] | no | Antioxidant and antimicrobial activity |
| Trehalose | no | Maize [14] | Herbaspirillum seropedicae, Azospirillum brasilense | signaling during the interaction with PGP bacteria |
| Trehalose | drought | maize [105] | genetically modified A. brasilense |
osmotic stress tolerance, root elongation |
| Trehalose | P deficiency | rice [106] | no | root elongation |
| Xylose | no | rice [107] | Corynebacterium sp., Rhizobium sp. | C source for PGP bacteria |
| Xylose | salinity | Wheat [108] | no | unknown |
| α-ketoglutaric acid | P deficiency | rice [109] | no | unknown |