| Apical Meristem of Sragassum valgare C. Agardh (Phaeophyta, Fucales)
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| Inderdeep Kaur
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Department of Batany, University of Delhi
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| ABSTRACT |
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Apical cell in Sragassum valgare is lodged in a cavity or groove filled with mucilalge rich in carboxylated and sulphated polysaccharides. The associated promeristem cells have thin wall β rich in carboxylated polysaccharides. The cytoplasm of apical cell and promeristem has many small vacuoles and is rich in proteins and sulphated polysaccharides. Mitotic division in the apical cell results in branch formation. A similar apical cell organisation is seen in receptacles. The apical cell of the receptacle remains active till conceptacle initiation after which is loses its loses its identity. The meristoderm, cortex and medulla are derived from promeristem and show a differential distribution of cytoplasmic inclusions.
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| Key words:
apical cell, cortex, medulla, polysaccharides, promeristem, Sargassum vulgare |
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