Question

describe vegetative structure of porella

Answer 1

HeLLO DeaR

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The apical growth of the thallus is accom­panied by the progressive death and decay of the older parts of the thallus and consequent separation of the younger parts at the point of dichotomy of the thallus. The separated bran­ches develop to form new plants.In some species (P. rotundifolia) discoid multicellular gemmae ace produced on the lower surface of the leaves. Gemmae germinate to produce new plants.

A two-celled thick long stalk is deve­loped from the primary stalk cell, following repeated transverse and vertical divisions. The primary antheridial cell forms the main body of the antheridium. It forms two identical antheri­dial cells by a vertical division.