Table 2.

Relative intensity of immunogold labeling for sporophyte and gametophyte placental cell walls in P. patens with 16 monoclonal primary antibodies.

Primary Antibody	Sporophyte	Gametophyte
JIM7	++	+
JIM5	+	+
LM19	+	++
LM20	-	-
LM5	+	±
LM13	±	±
LM15	±	±
LM25	±	+
LM21	+	+
LM28	-	-
JIM13	±	±
LM6*	±	+
JIM8	-	-
LM2	-	-
Callose	+	+
JIM12	-	-

Notes:

^+++,very strong

^++,strong

^+,weak

^±,present

^−,absent

^*LM6 binds to arabinan residues in RG-I pectins and AGPs.