caa a22 4500 477053971 CHVBK 20180405111344.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF02153057 doi (NATIONALLICENCE)springer-10.1007/BF02153057 Weber Martina Institute of Botany, University of Vienna, Rennweg 14, A-1030, Vienna, Austria aut Apertural chambers in Geranium [Elektronische Daten] Development and ultrastructure [Martina Weber] Pollen grains ofGeranium robertianum andG. pratense are tricolpate. At the time of the vacuolated microspore stage intine protrusions are formed at each aperture. Each aperture becomes separated from the vegetative cytoplasm by a thick ectintine layer. Starch grains are enclosed in the protrusions and do not participate in pollen tube growth. Springer-Verlag, 1996 Apertural protrusion nationallicence Vacuolated microspore nationallicence Starch nationallicence Ectintine nationallicence Pollen germination nationallicence Geranium nationallicence Sexual Plant Reproduction Springer-Verlag 9/2(1996-03-01), 102-106 0934-0882 9:2<102 1996 9 497 https://doi.org/10.1007/BF02153057 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02153057 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Weber Martina Institute of Botany, University of Vienna, Rennweg 14, A-1030, Vienna, Austria aut NATIONALLICENCE 773 0- Sexual Plant Reproduction Springer-Verlag 9/2(1996-03-01), 102-106 0934-0882 9:2<102 1996 9 497 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer