Table 1.

Stress-induced changes in the level of free polyamines in plants.

Species	Stress	Put	Spd	Spm	References
Pine	Drought	Up	Up	Up	De Diego et al., 2013
Pepper	Drought	Upa	Upa	Upa	Sziderics et al., 2010
Rice	Drought	Down	Up	Up	Yang et al., 2007
Wheat	Osmotic	Up	Up	Up	Grzesiak et al., 2013
Potato	Osmotic	Down	Down	Down	Li et al., 2005
Bromus	Osmotic	Down	Down	Down	Gicquiaud et al., 2002
Cucumber	Flooding	Up	Up	Up	Shi et al., 2008
Citrus	Flooding	Up	Upb	Upb	Arbona et al., 2008
Tobacco	Flooding	Up	Up	Steady	Hurng et al., 1994
Rice	Anoxia	Up	Steady or up	Steady or up	Reggiani et al., 1989
Arabidopsis	Heat	Up	Up	Up	Sagor et al., 2013
Tobacco	Heat	Up	Up	Up	Cvikrova et al., 2012
Wheat	Heat	Down	Up	Up	Goyal and Asthir, 2010
Wheat	Cold	Up	Up	Up	Kovacs et al., 2010
Maize	Cold	Up	Steady	Down	Nemeth et al., 2002
Wheat	CO2	Down	Up	Up	Högy et al., 2010
Common sage	UV	Up	Up	Up	Radyukina et al., 2010
Scots pine	K+ deficit	Up	Steady	Steady	Sarjala, 1996
Arabidopsis	K+ deficit	Up	Steady	Steady	Watson and Malmberg, 1996

^aIn leaves but not root tissues;

^bin sensitive genotype only.