On both surfaces of the leaf there are many sterile conceptacles, the cryptostomata or cryptoblasts (Fig. 3.117D). These are flask-shaped with many sterile unbranched filaments, the paraphyses developed from the base.

On the surface and margins of the ‘leaves’ are small pores known as ostioles. These pores are openings of small flask shaped sterile cavities called crypto-stomata or sterile conceptacles. These cavities bear hairs and paraphyses inside. The branch system arises from the base of a ‘leaf’ like lateral.

These pores are openings of small flask shaped sterile cavities called crypto-stomata or sterile conceptacles. These cavities bear hairs and paraphyses inside. The branch system arises from the base of a ‘leaf’ like lateral.

These pores open in small flask shaped sterile cavities, called cryptostomata or sterile conceptacles. The leaves present in the lower part of the primary lateral bear rudimentary axillary branches and those present in the upper portion have axillary branch systems.

On both surfaces of the leaf there are many sterile conceptacles, the cryptostomata or cryptoblasts . These are flask-shaped with many sterile unbranched filaments, the paraphyses developed from the base. The paraphyses protrude out through the opening present on the outer side, the ostiole.

Many flask-shaped cryptostomata or sterile conceptacles are also present in the “leaf”. They contain many sterile hairs or paraphyses. 6. Cryptostomata open by a pore known as ostiole. 7. Epidermis is photosynthetic in function, cortex acts as storage region, and medulla serves the function of conduction.

1991年12月1日 · Sargassum vulgare C. Agardh shows androgynous receptacles, each bearing on an average 12 unisexual conceptacles which open outside by ostiole, and wherein gametangia (antheridia or oogonia) lie...

2024年4月28日 · Gametogenesis: Sargassum exhibits a complex life cycle with alternation of generations. The diploid ( 2 n) sporophyte phase produces specialized structures called conceptacles, which contain reproductive structures known as conceptacular receptacles.

In certain species of Sargassum there are found sterile flask-shaped structures borne on primary branches and on leaf-like expansions. These structures look like the conceptacles and are known as cryptoblasts (Fig. 113F). They have their early stages of …

Such conditions indicate that the cryptostomata have been derived from conceptacles whose sexual organs have become sterile. The spermatocysts develop as in other Fucaceae, each finally producing sixty-four sperms which are discharged from a partly terminal and partly lateral rent.