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Cellulose synthesizing terminal complexes and morphogenesis in tip‐growing cells of Syringoderma phinneyi (Phaeophyceae)
Author(s) -
Schüβler Arthur,
Hirn Susanne,
Katsaros Christos
Publication year - 2003
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1046/j.1440-1835.2003.00291.x
Subject(s) - microfibril , cellulose , biology , morphogenesis , protein subunit , cell wall , particle (ecology) , biophysics , botany , microbiology and biotechnology , biochemistry , ecology , gene
SUMMARY The intramembrane particles and cellulose synthesis of the brown alga Syringoderma phinneyi Henry et Müller were examined using replicas of freeze‐fractured apical cells. Like in other brown algae, linear terminal complexes (TCs) were found in the plasmatic fracture face (PF) of the plasmalemma, which are the putative cellulose synthases. Terminal complexes consist of a single row of particles, each particle composed of two sub‐units, and are found in close relationship with cellulose microfibril imprints. Examination of the distribution of TCs revealed a clear apico‐basal gradient, with a higher density of TCs in the apical part. This seems to reflect the tip growth of the apical cells. The rate of cellulose synthesis per TC subunit was calculated based on the dimensions of the TCs and cellulose microfibrils.