Carrageenans in the cell walls of Chondrus crispus Stack. (Rhodophyceae, Gigartinales).

Effects of UVB radiation on the agarophyte Gracilaria domingensis (Rhodophyta, Gracilariales): Changes in cell organization, growth and photosynthetic performance

“…TB-O staining produces a violet metachromatic reaction in the cell walls of all sections of G. domingensis as seen in green and red strains of K. alvarezii (Schmidt et al, 2009), Chondrus crispus (Gordon and McCandless, 1973), Chondria tenuissima C. Agardh (Tsekos, 1985) and H. musciformis (Bouzon, 2006). This metachromatic reaction is used in histological studies as an indicator of acidic polysaccharides (Gordon-Mills et al, 1978). Table 1 Changes of photosynthetic pigments (g/g (FW)) of G. domingensis exposed to UVBR for 3 h per day over a period of 21 days.…”

Changes in ultrastructure and histochemistry of two red macroalgae strains of Kappaphycus alvarezii (Rhodophyta, Gigartinales), as a consequence of ultraviolet B radiation exposure

“…This metachromatic reaction is used in histological studies as an indicator of acidic polysaccharides (Gordon-Mills et al, 1978). The violet metachromatic color with TB-O is produced by polysaccharides with carboxyl and sulfated groups (Mc Cully, 1968).…”

The Structural Bases of the Processive Degradation of ι-Carrageenan, a Main Cell Wall Polysaccharide of Red Algae

“…24 Carrageenans are the main components of the cell walls of various marine red algae (Rhodophyta), where they are laid out as highly ordered molecules, both associated to the cellulose microfibrils or in the microfibril-less intercellular matrix. 26,27 This large family of hydrocolloids is made up of linear chains of galactopyranose residues in the D-configuration, linked by alternating a(1 ! 3) and b(1 !…”