Diurnal changes in flavonoids

被引：60

作者：

Veit, M ^{[1
]}

Bilger, T ^{[1
]}

Muhlbauer, T ^{[1
]}

Brummet, W ^{[1
]}

Winter, K ^{[1
]}

机构：

[1] SMITHSONIAN TROP RES INST,BALBOA,PANAMA

来源：

JOURNAL OF PLANT PHYSIOLOGY | 1996年 / 148卷 / 3-4期

关键词：

Anacardium excelsum; chlorophyll fluorescence; Cryptogramma crispa; flavonoids; UV-B radiation;

D O I：

10.1016/S0176-1617(96)80282-3

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Field studies of a tropical tree, Anacardium excelsum, and a northern hemisphere high altitude fern, Cryptogramma crispa, revealed marked diurnal changes in soluble flavonoid content of leaves and fronds, respectively. The flavonoid content increased during the morning and decreased during the afternoon. In plants of C. crispa covered with W-B absorbing filters, the flavonoid content remained at a constant level throughout the day/night cycle. Upon removal of W-B absorbing filters (at night), the flavonoid content increased the next morning in a fashion similar to that observed in control plants maintained without filters. Decreases in photosystem II photochemical efficiency upon exposure of C. crispa to natural daylight were similar in plants previously covered with UV-B absorbing filters and in control plants, probably owing to the observed ability of plants to rapidly accumulate UV-B protective flavonoids.

引用

页码：478 / 482

页数：5

共 24 条

[1] PHOTOSYNTHESIS DAMAGE AND PROTECTIVE PIGMENTS IN PLANTS FROM A LATITUDINAL ARCTIC ALPINE GRADIENT EXPOSED TO SUPPLEMENTAL UV-B RADIATION IN THE FIELD [J].