Assertion: zygote | /r/HasProperty | surrounded with cell wall material
Facets:
value: after 2 h
type: TEMPORAL
Source sentences:
text: Calcofluor and PATAG (periodic acid-thiosemicarbazide-silver proteinate) staining of zygotes showed that cell wall regeneration occurred as early as 20 min after enzymatic isolation and that after 2 h each zygote was surrounded with cell wall material.