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Table 9 Correlation analysis between identified phytochemicals and biological activities of P. speciosa seed

From: Assessment and comparison of phytochemical constituents and biological activities of bitter bean (Parkia speciosa Hassk.) collected from different locations in Malaysia

Phytochemicals DPPH activity FRAP activity Antibacterial activity
TFC 0.941** 0.966** 0.906**
TPC 0.883** 0.860** 0.933**
Quercetin 0.911** 0.894** 0.917**
Rutin 0.728* 0.741* 0.611 n.s
Kaempferol 0.930** 0.862** 0.889**
Catechin 0.886** 0.841** 0.847**
Luteolin 0.886** 0.900** 0.895**
Myricetin 0.820** 0.871** 0.755*
Gallic acid 0.900** 0.844** 0.921**
Ferulic cid 0.749* 0.669 n.s 0.882**
Caffeic acid 0.525n.s 0.627n.s 0.600 n.s
trans-Cinnamic acid 0.861** 0.794* 0.781*
p-coumaric acid 0.619n.s 0.406n.s 0.473n.s
  1. n.s, * and ** represent non-significant, significant at p < 0.05 and p < 0.01, respectively