Table 1 Preliminary phytochemical screening of different extracts of P. tetrastromatica and G. tenuistipitata.

From: Effect of solvents on bioactive compounds and antioxidant activity of Padina tetrastromatica and Gracilaria tenuistipitata seaweeds collected from Bangladesh

Seaweed species

Extracts

Saponin

Terpenoid

Cardiac glycoside

Phlobatannin

Phenolic

Flavonoid

P. tetrastromatica

Methanol

\(+\)

\(+\)

\(+\)

\(+\)

\(+\)

\(+\)

Ethanol

\(+\)

\(-\)

\(+\)

\(-\)

\(+\)

\(+\)

Water

\(+\)

\(-\)

\(-\)

\(+\)

\(+\)

\(+\)

G. tenuistipitata

Methanol

\(+\)

\(+\)

\(+\)

\(+\)

\(+\)

\(+\)

Ethanol

\(-\)

\(+\)

\(-\)

\(+\)

\(+\)

\(+\)

Water

\(+\)

\(-\)

\(+\)

\(+\)

\(+\)

\(+\)

  1. “+” constituent's existence, “−” constituent's non-existence.