Table 1.
Root terpenes that mediate below‐ground communications
| Compounds | Functions | Plants | Reference |
|---|---|---|---|
| β‐Pinene | Induced by the Diaprepes abbrevatus larvae; recruits entomopathgenic nematodes (Steinernema diaprepesi) | Swingle (Citrus paradisix Poncirus trifoliata) | 12 |
| Eucalyptol | Attracts cockhafer larve | Oak | 13 |
| E‐Caryophellene | Attracts an entomopathogenic nematode | Maize | 14 |
| Pregeijerene | Induced by the root weevil larvae; recruits entomopathgenic nematodes (Steinernema diaprepesi) | Citrus (Swingle citrumelo) | 15 |
| Geijerene | Induced by the root weevil larvae; recruits entomopathogenic nematodes (Steinernema diaprepesi) | Citrus (Swingle citrumelo) | 15 |
| Solavetivone | Phytoalexin induced by jasmonic acid (JA) and Cu; specific functions unknown | Hairy roots of Hyoscyamus albus | 16 |
| Rhizathalene A | Confers Arabidopsis root resistance to the herbivore fungus gnat (Bradysia spp.) | Arabidopsis | 17 |
| Momilactone A | Phytoalexin against fungi; also has allelopathic effects on lettuce (Lactuca sativa) | Rice | 18, 19 |
| Dihydroparthenolide | Stimulate germination of Striga hermonthica | Common ragweed (Ambrosia artemisifolia) | 20, 21 |
| Thalianin pathway metabolites | Selectively promote or inhibit root bacteria from different taxa | A. thaliana | 22 |
| Arabidin | Selectively promote or inhibit root bacteria from different taxa | A. thaliana | 22 |
| Glycinoeclepin A, B, C | Hatching stimulus for the soybean cyst nematode | Kidney bean | 23, 24 |
| Solanoeclepin A | Natural hatching factor of potato and tomato cyst nematodes | Potato and tomato | 25 |
| Avenacin A‐1 | Antifungal activity against ‘take‐all’ fungus/disease | Oat | 26 |
| Ginsenosides | Autotoxic and allelopathic effects | Panax notoginseng | 27 |
| Strigolactones | Witchweed (Striga lutea) germination stimulant; induces hyphal branching in arbuscular mycorrhizal fungi | Cotton | 28, 29 |