Table 1.

Examples of involvement of mitochondrial ETC- and OXPHOS-related signalling in environmental stress responses

Environmental stress	Mitochondrial signals	Stress response	Reference
Drought	Proline	Redox regulation	Liang et al. (2013)
ABA	ATP/ADP	Not characterized	Kharenko et al. (2011)
Cold	Ca2+	Not characterized	Li et al. (2013)
Heat	Ca2+, cytochrome c	PCD	Rikhvanov et al. (2014)
Heat, salinity	Redox potential	PCD regulation	Schwarzländer et al. (2009)
Salinity	Proline, ROS	ABA response	Garcia de la Garma et al. (2015)
Darkness	ATP/ADP	Alternative respiratory pathways	Pedrotti et al. (2018)
High light	Ascorbate	Heat-shock response	Stevens et al. (2018)
Hypoxia	NO	Ethylene response	Gibbs et al. (2015)
Experimental oxidative stress	RCS	PCD, redox regulation	Winger et al.(2005, 2007)
Lead	ROS, cytochrome c	PCD regulation	Kobylińska et al. (2017)
Chromium	ROS	Redox regulation	Dixit et al. (2002)
Xenobiotics	ATP/ADP	Alternative respiratory pathways	Alberto et al. (2017)
Piercing–sucking insects	AOX	Resistance	Zhang et al. (2012)
Pseudomonas spp.	AOX	Resistance	Zhang et al. (2012)
Flagellin	Proline	Immunity	Fabro et al. (2016)
Toxins	ROS	PCD	Yao et al. (2002)