TABLE 1.

Some examples of actual/presumed hormesis related to Parthenium hysterophorus.

treatment	test plant	increased parameter	reference
parthenin
	Echinochha crus-galli	root length*
	Eragrostis curvuUi	root length*	Belz et al. 2007a
	Phaseolus aureus	shoot dry weight*
		shoot length*	Batish et al. 1997a
	Tnticum aestivum	root/shoot length	Batish et al. 1997b
aqueous extracts of plant material
leaves (fresh material)	Eragrostis tef	root length*	Belz et al. 2007a
leaves (dry material)	Tnticum aestivum	shoot fresh weight	Pandey et al. 1993b
leaves, flower, stem, root (dry material)	Oryza sativa	carotenoid content
		chlorophyll content fresh weight
		root/shoot length	Pandey, 1994b
leaves, flower, stem, root (dry material)	Eichiwrnia crassipes	fresh weight
		no. of healthy leaves	Pandey et al. 1993b
	Salvinia molesta	fresh weight
		no. of healthy fronds	Pandey 1994a,b

^*statistical significance verified