TABLE 1.

Effects of solidifying agents and bivalent cations on Sporichthya growth

Bivalent cation	Solidifying agent	Growth at a cation concn of:
		0 mM	2 mM	5 mM	10 mM
CaCl2	Gellan gum		+++a	++	+
MgCl2 · 6H2O	Gellan gum		++	++	+
MgSO4 · 7H2O	Gellan gum		++	+	+
CaCl2	Agar	+	+	+	+

^a+++, good growth; ++, moderate growth; +, poor growth.