TaMYB 13 is a transcriptional activator of fructosyltransferase genes involved in β - 2 , 6 - linked fructan synthesis in wheat Gang -
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TaMYB13-1, a R2R3 MYB transcription factor, regulates the fructan synthetic pathway and contributes to enhanced fructan accumulation in bread wheat
Fructans are the major component of temporary carbon reserve in the stem of temperate cereals, which is used for grain filling. Three families of fructosyltransferases are directly involved in fructan synthesis in the vacuole of Triticum aestivum. The regulatory network of the fructan synthetic pathway is largely unknown. Recently, a sucrose-upregulated wheat MYB transcription factor (TaMYB13-1...
متن کاملStem carbohydrate dynamics and expression of genes involved in fructan accumulation and remobilization during grain growth in wheat (Triticum aestivum L.) genotypes with contrasting tolerance to water stress
The genetic and physiological mechanisms underlying the relationship between water-soluble carbohydrates (WSC) and water stress tolerance are scarcely known. This study aimed to evaluate the main WSC in stems, and the expression of genes involved in fructan metabolism in wheat genotypes growing in a glasshouse with water stress (WS; 50% field capacity from heading) and full irrigation (FI; 100%...
متن کاملMolecular and functional characterization of a cDNA encoding fructan:fructan 6G-fructosyltransferase (6G-FFT)/fructan:fructan 1-fructosyltransferase (1-FFT) from perennial ryegrass (Lolium perenne L.).
Fructans are the main storage compound in Lolium perenne. To account for the prevailing neokestose-based fructan synthesis in this species, a cDNA library of L. perenne was screened by using the onion (Allium cepa) fructan:fructan 6G-fructosyltransferase (6G-FFT) as a probe. A full length Lp6G-FFT clone was isolated with significant homologies to vacuolar type fructosyltransferases and invertas...
متن کاملEffect of Temperature and Storage Time on Fructosyltransferase Activities (1-FFT and 6G-FFT) in Onion Bulb Tissues
About 80% of onion bulb dry matter is non-structural carbohydrates (Darbyshire & Henry, 1981). These carbohydrates are predominantly glucose, fructose, sucrose and low-molecular-weight fructans, while starch and raffinose are absent (Darbyshire & Henry, 1981; Benkeblia et al., 2002). The metabolism of sugars is closely linked to the dormancy and sprouting state (Kato, 1966), and the most import...
متن کاملبیان ژنهای درگیر در متابولسیم فروکتان در ساقه گندم تحت تنش کمآبی
Water deficient stress is one of the major limiting factors of wheat production in arid and semiarid areas of the world such as Iran. Under water deficient stress photosynthesis is limited and remobilization of assimilates stored in stems is more important to grain filling. In order to molecular analysis of fructan remobilization in wheat stem (penultimate) under terminal water deficit stress, ...
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