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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
UDP-sugar biosynthetic pathway: Contribution to cyanidin 3-galactoside biosynthesis in apple skin
Planta, Volume 230, No. 5, Year 2009
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Description
UDP-galactose:flavonoid 3-O-galactosyltransferase (UFGalT) is responsible for cyanidin 3-galactoside (cy3-gal) synthesis from cyanidin (cy) and UDP-galactose (UDP-gal) which are, respectively, catalyzed by anthocyanidin synthase (ANS) and UDP-glucose 4-epimerase (UGE). To clarify the contribution of UDP-galactose pathway to cy3-gal accumulation in apple skin, we analyzed the contents of UDP-gal and UDP-glucose (UDP-glu), cy, and, cy3-gal contents along with UGE activity. We confirmed that transcript levels for apple ANS and UDP-glucose: flavonoid 3-O-glucosyltransferase (UFGT) coincided with anthocyanin accumulation in three apple cultivars differing in their skin colors. During fruit development, changes in level of cy coincided with that of cy3-gal, whereas UDP-gal and UGE activity showed no similar trend with cy3-gal. Significant correlation was not observed between the changes in UGE activity and UDP-sugar contents. The effect of temperature and UV-B radiation (different environmental conditions) on the accumulation of UDP-sugars, cy and cy3-gal, and UGE activity were also investigated in a pale-red cultivar. High temperature tended to depress the accumulation of both UDP-sugars and cy concomitant with the decrease in cy3-gal content irrespective of UV-B radiation. Although there was no high inhibition of both cy and UDP-sugars at low-temperature without UV-B, cy3-gal accumulation was highly depressed. UGE activity was highest at low temperature with UV-B, but not much different under other conditions. Most of the parameters under different environmental conditions were significantly correlated with each other. Based on these results, contribution of UDP-sugar biosynthetic pathway to anthocyanin biosynthesis under different environmental conditions as well as during fruit development is discussed. © 2009 Springer-Verlag.
Authors & Co-Authors
Ban, Yusuke
Japan, Tsukuba
University of Tsukuba
Japan, Tsukuba
Institute of Fruit Tree and Tea Science, Naro
Kondo, Satoru
Japan, Chiba
Chiba University
Ubi, Benjamin Ewa
Japan, Tsukuba
Institute of Fruit Tree and Tea Science, Naro
Nigeria, Abakaliki
Ebonyi State University
Honda, Chikako
Japan, Tsukuba
Institute of Fruit Tree and Tea Science, Naro
Bessho, Hideo
Japan, Tsukuba
Institute of Fruit Tree and Tea Science, Naro
Moriguchi, Takaya
Japan, Tsukuba
University of Tsukuba
Japan, Tsukuba
Institute of Fruit Tree and Tea Science, Naro
Statistics
Citations: 54
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1007/s00425-009-0993-4
ISSN:
00320935
e-ISSN:
14322048
Research Areas
Cancer