Fructan content and synthesis in leaf tissues of Festuca arundinacea

The concentration of fructan in tall fescue (Festuca arundinacea Schreb.) changes during growth and in response to environment. The objective of this research was to compare the fructan concentration and fructosyl-transferase activity of tall fescue leaf tissues. Expanding leaves, inner and outer sh...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1988-04, Vol.86 (4), p.1247-1251
Main Authors: Housley, T.L, Volenec, J.J
Format: Article
Language:English
Subjects:
Asparagus
Biological and medical sciences
Carbohydrate metabolism
Carbohydrates
FESTUCA ARUNDINACEA
FEUILLE
Fructans
FRUCTOSA
FRUCTOSE
Fundamental and applied biological sciences. Psychology
HOJAS
Leaf blade
LEAVES
Metabolism
Oligosaccharides
Photosynthesis, respiration. Anabolism, catabolism
Plant physiology and development
Plants
POLYMERS
Seasons
TEJIDO (ANATOMIA)
TISSU
TISSUES
Trisaccharides
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Summary:The concentration of fructan in tall fescue (Festuca arundinacea Schreb.) changes during growth and in response to environment. The objective of this research was to compare the fructan concentration and fructosyl-transferase activity of tall fescue leaf tissues. Expanding leaves, inner and outer sheaths, and expanded blades of greenhouse-grown tall fescue plants were assayed for fructan concentration and fructosyl-transferase activity. Leaf sheaths contained significantly more nonstructural carbohydrate than did the expanded blade. Sheaths also contained a greater percentage of fructan with more than six sugar residues (long chain fructan), than either the expanded blade or expanding leaf. Expanding leaves contained a greater concentration of fructose and oligosaccharides than did sheath or blade tissues. Expanding leaves also had the greatest fructosyl-transferase activity measured either as radiolabel incorporated into fructans in tissue pieces or protein extracts. Activity of fructosyl-transferase was greater in expanding leaf tissue than in sheath tissues.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.86.4.1247