Total phenolic and lignin contents, phytochemical screening, antioxidant and fungal inhibition properties of the heartwood extractives of ten Congo Basin tree species

Table 4 Preliminary phytochemical analysis of the main groups in extractives woods

Active compounds	Test procedure	Bahia	Bilinga	Doussie	Moabi	Movingui	Okan	Okoume	Ozigo	Padouk	Tali
Sterols and terpenes	Liebermann-Buchard	+	++	+	+++	+++	+	+++	++	++	++
Alkaloids	Mayer, Bouchardat	−	−	−	−	−	−	−	−	−	+
Saponins	Flotting	+	+	−	+++	−	++	−	−	−	+
Tannins	Ferric chloride	+	+++	+++	++	+++	+++	+	+	+++	+++
Flavonoids	Shinoda test	+	++	+++	++	+++	+++	++	+	+++	+++

The popular colorimetric methods for identify chemicals groups on plant parts. All tests are replicated four times
+++ Present in high concentration, ++ present in moderate concentration, + present in low concentration, − not detected

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