fructan biosynthesis and degradation as part of plant metabolism controlling sugar fluxes during durum wheat kernel maturation
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ID: 213022
2015
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Abstract
Wheat kernels contain fructans, fructose based oligosaccharides with prebiotic properties, in levels between 2 and 35 weight % depending on the developmental stage of the kernel. To improve knowledge on the metabolic pathways leading to fructan storage and degradation, carbohydrate fluxes occurring during durum wheat kernel development were analyzed. Kernels were collected at various developmental stages and quali-quantitative analysis of carbohydrates (mono- and di-saccharides, fructans, starch) was performed, alongside analysis of the activities and gene expression of the enzymes involved in their biosynthesis and hydrolysis. High resolution HPAEC-PAD of fructan contained in durum wheat kernels revealed that fructan content is higher at the beginning of kernel development, when fructans with higher DP, such as bifurcose and 1,1-nystose, were mainly found. The changes in fructan pool observed during kernel maturation might be part of the signaling pathways influencing carbohydrate metabolism and storage in wheat kernels during development. During the first developmental stages fructan accumulation may contribute to make kernels more effective Suc sinks and to participate in osmotic regulation while the observed decrease in their content may mark the transition to later developmental stages, transition that is also orchestrated by changes in redox balance.
| Reference Key |
ecimini2015frontiersfructan
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|---|---|
| Authors | ;Sara eCimini;Vittoria eLocato;Rudy eVergauwen;Annalisa eParadiso;Cristina eCecchini;Liesbeth eVandenpoel;Liesbeth eVandenpoel;Joran eVerspreet;Christophe eCourtin;Maria Gracia eD'Egidio;Wim eVan den Ende;Laura eDe Gara |
| Journal | phytochemistry letters |
| Year | 2015 |
| DOI |
10.3389/fpls.2015.00089
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| URL | |
| Keywords |
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