Apical meristems inNymphaea stellata Willd

  • Ambuja Pillai
  • K. Y. Kavathekar


The shoot apex ofNymphaea stellata Willd. shows a tunica-corpus organization with a cytohistological zonation. The tunica is single-layered and the corpus exhibits three zones, the corpus mother cells zone, the flanking zone and the pith-rib meristem zone. The plastochron is divided into five stages based on the plastochron index—the minimal, early post-minimal, late post-minimal, pre-maximal and maximal. A cambium-like zone is developed proximal to the corpus mother cells zone in apices at the post-minimal stages, which contributes to the increase in height of the apex.

The root apex shows a transversal meristem, which is in the form of a curved plate of cells. This cell plate gives rise to the central cylinder, cortex and epidermis proximally, and the columella and periheral region of the root cap distally.


Shoot Apex Root Apex Leaf Primordium Periclinal Division Vegetative Shoot Apex 
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Copyright information

© Indian Academy of Sciences 1975

Authors and Affiliations

  • Ambuja Pillai
    • 1
  • K. Y. Kavathekar
    • 1
  1. 1.Department of BotanyUniversity of RajasthanJaipur

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