Skip to main content
Fig. 7 | EvoDevo

Fig. 7

From: Linking the evolution of development of stem vascular system in Nyctaginaceae and its correlation to habit and species diversification

Fig. 7

Development of successive cambia in stems of Okenia hypogaea (ontogeny 4). A Primary growth with polycyclic eustele. B Stem with cambial variant. Dashed ellipses indicate the arcs of successive cambia; note medullary bundles in the pith. C Secondary xylem and secondary phloem, pericycle parenchyma undergoing cell division (asterisks) to form a meristematic zone, where new cambia will be formed. D Developing variant cambium (thick arrow) and variant xylem formed mostly by fibres (double arrow). E Developing arc of successive cambia showing variant xylem with first formed vessel (yellow arrow). Scale bars: 200 μm (A); 400 μm (B); 50 μm (C, D); 100 μm (E). ccp cylindrical continuous procambium, mb medullary bundles, pe pericyclic fibers, sph secondary phloem, sxy secondary xylem. A, C–E Stained with toluidine blue. B Stained with astra blue and safranin

Back to article page

EvoDevo

ISSN: 2041-9139