Rosa glauca

Fruit for the birds Roses that flower onee only In summer, suoh as Rosa glauca, R. moyesii, and R. rubiginosa, will produce colorful, bird-attraoting rose hips In the fall. Although many roses benefit from deadheading, never deadhead roses grown for their fruits. 

Pectic polysaccharides in Rosa glauca bark157 and lucerne leaves and stems139 have been shown to contain 3- and 6-linked galactosyl residues. The sycamore, primary cell-walls contain appreciable proportions of terminal and 3-, 6-, 3,6-, and 2,6-linked galactosyl residues,55 125 and it is possible that many of these residues are components of an arabinogalac-tan (see later). 

Rosa glauca, alginates from Laminaria digitata and L. hyperborea, oligosaccharides released by enzymic hydrolysis of agarose, the rhamnomannans and acidic rhamnomannans of Sporothrix schenckii and Ceratocystis stenoceras, and cellulose 0-methyl, 0-carboxymethyl, and 0-hydroxyethyl ethers. Details of the structures of these polymers are included in Part II of this Report. 

Joseleau J-P, Chambat G, Vignon M, Barnoud F 1977 Chemical and C n.m.r. studies on two arabinans from the inner bark of young stems of Rosa glauca. Carbohyd Res 58 165-175... 

Nuclear magnetic resonance analysis of Rosa glauca araban has provided additional evidence that the arabinosyl residues are a-5-linked and in the furanose configuration. The C-1 resonance expected of a-arabinofuranosyl residues, but not the C-1 resonances expected of the P-arabinofuranosyl or a- and P-arabinopyranosyl residues, was detected by C-NMR analysis 68b). The proton NMR spectrum is consistent with a- or P-furanosyl residues and P-pyranosyl residues, but not with a-pyranosyl residues 68b). The a-anomeric nature of these linkages is confirmed by the negative optical rotations, from —181 to —108, exhibited by such arabans 11, 68b). 

Isolated from the bark of rose (Rosa glauca) (68b). 

REPS = Rose extracellular polysaccharides. Isolated from the medium of suspension-cultured Rose (Rosa glauca) cells (29). 

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