Results 171 to 180 of about 7,315 (199)

Fructan Metabolism: Reversal of Cold Acclimation

Journal of Plant Physiology, 1989
Summary Wheat seedlings grown at 23 °C were acclimated for 15 days at 4 °C and then transferred back to 23 °C.The activtiy of sucrose synthase (SS), sucrose phosphate synthase (SPS), invertase, sucrose sucrose fructosyl transferase (SST), fructan hydrolase (FH) and UDPase were measured at different intervals after subjecting the plants to the higher ...
J.A. Tognetti, P.L. Calderón, H.G. Pontis   +2 more
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Fructan metabolism and expression of genes coding fructan metabolic enzymes during cold acclimation and overwintering in timothy (Phleum pratense)

Journal of Plant Physiology, 2014
Metabolism of fructans in temperate grasses dynamically fluctuates before and during winter and is involved in the overwintering activity of plants. We monitored three candidate factors that may be involved in seasonal fructan metabolism in timothy (Phleum pratense): transcription levels of two fructosyltransferase (PpFT1 and PpFT2) genes and one ...
Ken-ichi, Tamura, Yasuharu, Sanada, Kazuhiro, Tase, Midori, Yoshida   +3 more
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Effect of nitrogen concentration on fructan and fructan metabolizing enzymes in young chicory plants (Cichorium intybus)

Physiologia Plantarum, 1999
Witloof chicory seeds (Cichorium intybus L. var. foliosum cv. Flash) were sown in acid‐washed vermiculite in a controlled environment growth chamber. Plants received a nitrogen poor (“N‐poor”: 0.2 mM NH4NO3) but otherwise complete medium, or a nitrogen rich (“N‐rich”: 2 mM NH4NO3) medium. After 1 month of growth the fructan concentration in the “N‐poor”
Wim Van den Ende, Joke De Roover, André Van Laere   +2 more
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Analysis of seasonal expression levels of wheat fructan exohydrolase (FEH) genes regulating fructan metabolism involved in wintering ability

Journal of Plant Physiology, 2016
In northern regions, winter wheat (Triticum aestivum L.) accumulates fructan during cold-acclimation in autumn and freeze-acclimation in early winter. The content of fructan in wheat crown tissues is associated with both freezing tolerance and snow mold resistance, and expression levels of fructan synthesis genes in leaf and crown tissue are correlated
Ayano, Meguro-Maoka, Midori, Yoshida
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Some factors affecting the metabolism of fructan by human oral flora

Archives of Oral Biology, 1972
Abstract The human oral bacteria cultured from samples of mixed saliva and plaque produced extracellular glucan and fructan when exposed to sucrose. The amounts and proportions of these components varied widely with the experimental conditions. The fructan, in contrast to the glucan, was always found to be labile in the presence of the oral bacteria ...
S A, Leach, J, Appleton, O A, Dada, M L, Hayes   +3 more
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Sucrose and fructan metabolism in wheat roots at chilling temperatures

Physiologia Plantarum, 1993
Sucrose and fructan metabolism were studied in wheat (Triticuin aotiirum L. cv. Tribal 800) roots during a period at chilling temperature. Enzyme activities related to fructan and sucrose metabolism were measured. Sucrose‐sucrose fructosyl transfer‐ase (EC 2.4.1.99) activity increased more than 25‐fold when plants were cooled to 4°C.
C. S. Santoiani, J. A. Tognetti, H. G. Pontis, G. L. Salerno   +3 more
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Fructan metabolism in leaves of Loliwn rigidum Gaudin

New Phytologist, 1991
summaryThis paper reports the conditions for the assay of sucrose–sucrose fructosyltransferase (SST); fructan–fructan fructosyltransferase (FFT), invertase and Fructan hydrolase (FH) in extracts of leaves of Loliutn rigidum Gaudin. Invertase had a temperature optimum between 30 and 35 °C and a pH optimum between 4.5 and 5.0 whereas the enzymes of ...
HENK SMOUTER, RICHARD J. SIMPSON
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Unresolved Problems in the Enzymology of Fructan Metabolism

1993
ABSTRACT The evidence for the participation of sucrose as the initial fructosyl donor for fructan synthesis in higher plants is reviewed. The current theories of fructan enzymology suggest that fructosyl transfer from sucrose to fructans and their hydrolysis to yield free fructose are both mediated by specific enzymes each catalysing a single ...
C.J. POLLOCK, A.M. WINTERS, A.J. CAIRNS
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Fructans and fructan-metabolizing enzymes in leaves of Lolium perenne

2001
International ...
Pavis, N., Boucaud, Johann, Prudhomme, M.P.   +2 more
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Fructan metabolism in jerusalem artichoke and chicory

2000
Fructans of inulin type are the reserve carbohydrates in roots of chicory and tubers of jerusalem artichoke. The progress made on the (a) enzymology of fructan metabolism, (b) localization of fructan synthesizing and hydrolyzing machinery, (c) carbohydrate changes during growth, (d) in vitro fructan metabolism, (e) possible mode of regulation of ...
openaire   +1 more source