Ovules, megagametophytes and embryos. Ultrastructural studies after cryofixation Authors Thijssen, M.H. Publication Date Jan 01, 2003 Source Wageningen University and Researchcenter Publications Keywords Angiosperms Biological Techniques Brassica Cell Ultrastructure Cryopreservation Ovules Petunia Plant Embryos Plants Bedektzadigen Biologische Technieken Brassica Celultrastructuur Cryopreservering Onbevruchte Eitjes Petunia Planten Plantenembryo'S Language English License Unknown External links Full record on research.wur.nl