nonhuman 8 pollen germination 8 Arabidopsis 6 Arabidopsis thaliana 6 Germination 6 Pollen 6 Pollen germination 6 article 6 growth, development and aging 6 unclassified drug 6 Angiosperms 4 Endoplasmic Reticulum, Rough 4 Gene Expression Regulation, Developmental 4 Gene Expression Regulation, Plant 4 Microscopy, Electron, Transmission 4 Ontogeny 4 Oxalis 4 Oxalis articulata 4 Plant Proteins 4 Pollen Tube 4 Ubisch bodies 4 Ultrastructure 4 cell ultrastructure 4 controlled study 4 gene expression regulation 4 genetics 4 germination 4 lipid 4 metabolism 4 ontogeny 4