b Detail of meristematic stem apex, showing the upper portion of the meristem originating the protoderm
(black arrow), the basal portion originating the medullary meristem (red star) and the lateral portions forming the peripheral meristem (red arrows).
In Figure 4 (i to vi), procambium, which will give rise to vascular bundles, is observed above the embryonic axis, passing through its lateral, distributing in an ordered way, as it distances from the embryonic axis, it follows branching, becoming peripheral near the protoderm
, and remaining thus in all its distal region.
(1997) also described the formation of protoderm
and parenquimatous tissue, but did not observe vascular tissue development.
Initially, groups of protoderm
cells of the stipule elongate anticlinally and form dense cytoplasm and large nuclei (Fig.
Within the transition zone tissue differentiation begins with the establishment of the primary histogenes, as are the protoderm
, procambium, and the quickly extending groundhistogen (Sachs, 1991:131) which produce during further growth the final tissue organization of the adult vegetation body (final histogenesis: Hagemann 1999).
Hall) 8.00 Protoderm
HA (Protameen) 1.00-2.00 Parsol 1789 (Roche) 2.00-3.00 Preregen (Pentapharm) 2.00-3.00 Hysol 1% (Pentapharm) 1.00-2.00 Silicon 345 2.00 Biopeptide E/L (Sederma) 1.00-2.00 Tyrostat-10 (Fytokem) 1.00 Green tea extract 8.00 Butylene glycol 2.00-3.00 Phenonip 1.00