Table 1.
A summary of the main studies on the changes in the alternative respiratory pathway and the expression of the alternative oxidase (AOX) gene or protein during different types of plant–pathogen (or virus) interaction.
| Experimental system | Events | Reference |
|---|---|---|
| Arabidopsis thaliana; cell suspensions infected with Xanthomonas campestris pv. campestris | AOX transcript was transiently induced by avirulent strain. No detectable AOX expression during virulent infection | Lacomme and Roby, 1999 |
| Arabidopsis thaliana; leaves infected with Pseudomonas syringae pv. tomato | Infiltration with avirulent strain resulted in a rapid increase in cyanide‐resistant O2 uptake, AOX mRNA and AOX protein content, whereas the increase was delayed in the compatible combination | Simons et al., 1999 |
| Nicotiana tabacum L. (susceptible cultivar); leaves infected with Ttobacco mosaic virus (TMV) | An enhancement in AOX protein content was observed in infected leaves, but there were no changes in the partitioning of electrons to the alternative pathway and the activity of the alternative pathway | Lennon et al., 1997 |
| N. tabacum L.; leaves infected with TMV | High levels of AOX transcript in resistant cultivar; no increase in AOX transcript in susceptible cultivar | Chivasa and Carr, 1998 |
| Nicotiana sylvestris; leaves infected with harpin from Erwinia amylovora | Transcript of AOX was transiently induced at 1 h after harpin treatment | Garmier et al., 2002 |
| Lactuca sativa cv. Success; leaves infected with Pseudomonas cichorii (Pc) or P. syringae pv. syringae (Pss) | Continuous increase in AOX transcription during the development of Pc‐induced soft rotting disease. Two phases of AOX gene expression were observed during the Pss‐induced hypersensitive response | Kiba et al., 2007 |
| Nicotiana sylvestris; leaves infected with bacterial elicitor harpin NEa | The activity of the alternative pathway increased within the first 8 h after harpin treatment. AOX transcripts increased transiently at 1 h after harpin treatment | Vidal et al., 2007 |
| Nicotiana tabacum cv. Samsun; leaves infected with tobacco necrosis virus (TNV) or TMV | The levels of AOX transcript displayed a transient suppression within the first 6 h, but increased again at 20 and 24 h. | Künstler et al., 2007 |
| Arabidopsis thaliana; suspension cells infected with harpin from Pseudomonas syringae | Strong induction of AOX transcript within the first 4 h after harpin treatment | Krause and Durner, 2004 |
| Solanum lycopersicum (susceptible cultivar); leaves infected with TMV | Induction of AOX transcript as early as 12 h post‐inoculation | Fu et al., 2010 |