Type of Stress	miRNA biomarkers	Up regulated	Down regulated	References
Virus	miR171			Kasschau et al. 2003, Zhou and Luo 2013
	miR156, miR164			Kasschau et al. 2003
	miR159			Naqvi et al. 2008
	miR164, miR171			Naqvi et al. 2008
	miR1885			He et al. 2008
Bacteria	miR393			Navarro et al. 2006
	miR398			Jagadeeswaran et al. 2009
	miR160, miR167			Fahlgren et al. 2007
	miR825			Fahlgren et al. 2007
Fungi	miR156, miR159, miR164, miR171, miR396			Xin et al.2010
	miR393, miR444, miR827			Xin et al.2010
	miR7696			Campo et al. 2013
Nematode	miR161, miR164, miR167a, miR172c, miR396a,b, miR398a			Hewezi et al. 2008