The flavonoid profile of pigeonpea, Cajanus cajan: a review

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Table 2 Concentrations (mg/g of plant material) of flavonoids reported from Cajanus cajan

Flavonoid	Plant organ	Concentrations (mg/g)	Reference
2′-Hydroxygenistein	Stem	0.037^a	Ingham (1976)
4′-O-methylcajanin	Stem	0.022^a	Ingham (1976)
Apigenin	Leaves	0.130^b	Zu et al. (2006)
		0.132^a	Fu et al. (2008)
		0.159^b	Wei et al. (2013a)
Biochanin A	Leaves	0.405^b	Wei et al. (2013a)
Cajanin	Stem	0.074^a	Ingham (1976)
Cajanol	Stem	0.370^a	Ingham (1976)
Cajanol	Leaves	0.369^b	Wei et al. (2013a)
Chrysanthemin		2.250^b	Lai et al. (2012)
Formonentin	Leaves	0.318^b	Wei et al. (2013a)
Genistein	Stem	0.105^a	Ingham (1976)
Isorhamnetin	Leaves	0.091^b	Zu et al. (2006)
Luteolin	Leaves	0.263^b	Zu et al. (2006)
Luteolin	Leaves	0.268^a	Fu et al. (2008)
Orientin	Leaves	18.82^b	Wu et al. (2009)
Peonidin 3-glucoside		0.540^b	Lai et al. (2012)
Pinostrobin	Leaves	3.500^b	Kong et al. (2010)
		5.548^b	Wei et al. (2013a)
		30.29^b	Wu et al. (2009)
Quercetin	Leaves	0.082^b	Zu et al. (2006)
Vitexin	Leaves	21.03^b	Wu et al. (2009)

NB. The highest mean yield (extraction concentration, mg/g) is reported here. ^aconcentration reported from fresh material, ^bconcentration reported from dried material.