Biosynthesis of dulcitol in Euonymus japonica

Bliss, C.A.; Hamon, N.W.; Lukaszewski, T.P.

doi:10.1016/0031-9422(72)85022-2

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…Galactitol is abundantly found in the phloem sap of the Celastraceae family, which includes the spindle tree ( Euonymus europaeus L.) ( Bieleski 1982 ). It is considered to be synthetized from d fructose-6-P-galactose by a NADPH-dependent galactitol-synthetizing aldose reductase (aldehyde reductase) (EC:1.1.1.21) ( Figure 2B , Table 2 ) ( Bliss et al 1972 , Negm 1986 ).…”

Section: Carbon Is Transported In Different Forms In the Phloem Of Treesmentioning

confidence: 99%

Mobile forms of carbon in trees: metabolism and transport

Domínguez

Niittylä

2021

Tree Physiology

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Plants constitute 80% of the biomass on earth, and almost two thirds of this biomass is found in wood. Wood formation is a carbon demanding process and relies on carbon transport from photosynthetic tissues. Thus, understanding the transport process is of major interest for understanding terrestrial biomass formation. Here we review the molecules and mechanisms used to transport and allocate carbon in trees. Sucrose is the major form in which carbon is transported, found in the phloem sap of all so far investigated tree species. However, in several tree species sucrose is accompanied by other molecules, notably polyols and the raffinose family of oligosaccharides. We describe the molecules that constitute each of these transport groups, and their distribution across different tree species. Further, we detail the metabolic reactions for their synthesis, the mechanisms by which trees load and unload these compounds in and out of the vascular system, and how they are radially transported in the trunk and finally catabolized during wood formation. We also address a particular carbon recirculation process between phloem and xylem that occurs in trees during the annual cycle of growth and dormancy. A search of possible evolutionary drivers behind the diversity of C carrying molecules in trees reveals no consistent differences in carbon transport mechanisms between angiosperm and gymnosperm trees. Furthermore, the distribution of C forms across species suggests that climate related environmental factors will not either explain the diversity of carbon transport forms. However, the consideration of C transport mechanisms in relation to tree—rhizosphere coevolution deserves further attention. To conclude the review, we identify possible future lines of research in this field.

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Section: Carbon Is Transported In Different Forms In the Phloem Of Treesmentioning

confidence: 99%

Mobile forms of carbon in trees: metabolism and transport

Domínguez

Niittylä

2021

Tree Physiology

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“…De nombreuses études ont été réalisées sur des champignons (Bieleski, 1982 (Bieleski, 1982), et le galactitol chez Evonymus japonica (Bliss et al, 1972). Cela signifie qu'ils ne sont pas des produits photosynthétiques primaires chez ces espèces qui constituent des exceptions.…”

Section: Métabolismeunclassified

“…Les alditols peuvent être formés soit par la réduction des hexoses phosphates (Bieleski et Redgwell, 1977 ;Redgwell et Bieleski, 1978), soit par réduction des hexoses (Bliss, 1972 ;Bieleski, 1982 (Bieleski, 1982), et du sorbitol chez les Rosaceae (Bieleski, 1977). En effet, le sorbitol peut être synthétisé par les feuilles à partir d'hexoses exogènes, par exemple à partir du glucose chez le prunier (Anderson et al, 1962), le pommier (Hutchinson et al, 1959, cités par Whetter et Taper, 1963 et le poirier (Bieleski, 1977) (Bieleski, 1982 Les enzymes de synthèse L'analyse enzymatique (Yamaki, 1980a ;Hirai, 1981 ;Negm et Loescher, 1981), les études sur les relations source-puits (Loescher et al, 1982 ;Merlo et Passera, 1991), ainsi que les études au moyen d'un marquage radioactif (Grant et ap Rees, 1981 ;Bieleski et Redgwell, 1985), ont établi que la synthèse du sorbitol est confinée principalement aux feuilles sources, alors que l'utilisation métabolique est limitée aux tissus puits.…”

Section: Métabolismeunclassified