Abstract:
The accumulation and composition of berry anthocya
nin was measured in
Vitis vinifera
L. cv. Yatomi Rosa using various light qualities pr
ovided by polyethylene films (red,
orange, green, blue, and white). The anthocyanin ha
s been enhanced significantly by blue
light filter film and suppressed by red, orange, an
d green films compared to white film
(control), which suggests that Yatomi Rosa has adap
ted photoreceptors to UV-A/blue
light. We also observed that Yatomi Rosa mainly acc
umulated glucosides of peonidin
(Pn). Significant differences in composition of ant
hocyanin were observed in different
light filter films. Despite the use of different li
ght quality films, similar patterns were
observed for phenylalanineammonia-lyase (PAL), cinn
amate-4-hydroxylase (C4H), 4-
coumarate: coenzyme A ligase (4CL), and chalcone is
omerase (CHI) activities, which are
components of the anthocyanin biosynthetic pathway.
But the activities of PAL and CHI
were induced significantly under blue light filter
film, which shows that blue light may
increase anthocyanin accumulation in
V. vinifera
L. by stimulating PAL and CHI
activities. The present study confirmed the importa
nce of blue irradiance spectrum in
anthocyanin biosynthesis in Yatomi Rosa. The increa
se of blue light under enough
effective transmission light conditions in greenhou
ses can improve the color of Yatomi
Rosa and may be used as a solution to overcome poor
berry colors in hot and humid
regions of Southern China.
Keywords:
Blue light, Coloration of berry, Polyethylene films
, Southern China.
