http://www.cnr.it/ontology/cnr/individuo/prodotto/ID188916
Influence of Shading on Flowering Induction and Inulin Metabolism in Roots of Cynara cardunculus L. (Articolo in rivista)
- Type
- Label
- Influence of Shading on Flowering Induction and Inulin Metabolism in Roots of Cynara cardunculus L. (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Melilli M.G.; Raccuia S.A., (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR ISAFOM UOS Catania (literal)
- Titolo
- Influence of Shading on Flowering Induction and Inulin Metabolism in Roots of Cynara cardunculus L. (literal)
- Abstract
- Abstract
Inulin-type fructan is a fructose polymer that has mostly or exclusively the ?
(2->1) fructosyl-fructose linkage. In higher plants this carbon source plays an
important role in osmoregulation and crioprotection. The storage of fructans (inulin
and water soluble sugars) in underground organs of Cynara cardunculus grown in
Mediterranean environment represents an adaptive strategy to overcome the
Mediterranean unfavorable conditions. Moreover, the variation in dry matter
accumulation is strictly correlated with inulin synthesis and breakdown in roots and
inulin metabolizing enzyme activities. Since it has been shown that the maximum
accumulation in roots happens just before flower formation, the aim of this work
was to evaluate differences in inulin content and inulin metabolizing enzymes in
roots of C. cardunculus var. sylvestris Lam. grown under two different treatments to
obtain plants with flower induction (F) or not (WF). The experiments were carried
out at Catania (south Italy, 37°27'N; 15°4'E, 10 m a.s.l.) during 2005-2006. One wild
cardoon Sicilian population S3, was sown in pots (35 cm diameter), containing soil as
substrate, for a total of 200 pots. The sowing was performed in October 2005. Half of
the plants were grown in open air (F), the other half was placed under shade clothes
(WF). Plants were harvested every fifteen days from March to June 2006 for a total
of 7 samplings. For each harvest total biomass, including roots, was immediately
weighed to determine the fresh weight (FW). Corresponding to each sampling, the
root sugar characterization (glucose, fructose, sucrose and inulin), and the enzyme
activities of sucrose:sucrose 1-fructosyl transferase (1-SST; EC 2.4.1.99),
fructan:fructan 1-fructosyltransferase (1-FFT, EC 2.4.1.100) and fructan 1-
exohydrolase (1-FEH; EC 3.2.1.80) were analyzed. Results showed that the WF
plants accumulated higher inulin content in roots than F plants and this result is
correlated with the 1-FFT activity, the enzyme responsible of elongation of fructose
chain of inulin-type fructans. (literal)
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- Autore CNR
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