Effect of supplemental UV-B and UV-A on phenolic accumulation, growth and photosynthesis in barley and soybean seedlings
- Miami Univ., Oxford, OH (USA)
Barley (Atlas 68) and soybeans (Williams, Pella and Hobbit) were grown under 260 {mu}E m{sup {minus}2} s{sup {minus}1} cool-white fluorescent light plus: (1) no supplemental illumination, (2) UV-B from Phillips FS40 lamps to simulate 30% O{sub 3} depletion at 40{degree}N, or (3) UV-A from Mylar-filtered FS40 lamps. In barley primary leaves, neither UV-A nor UV-B had any effect on the accumulation of flavonoids or ferulic acid in the epidermis. In contrast, in barley mesophyll flavonoids were increased ca. 40% by UV-A and ca. 80% by UV-B and mesophyll ferulic acid increased ca. 10 fold under either UV-A or UV-B. In soybean primary leaves UV-A had no effect on flavonoid (all were epidermal) accumulation in any variety, but UV-B increased flavonoid accumulation ca. 20% in Williams, 100% in Pella and almost 10-fold in Hobbit. UV-A and UV-B effects on growth rates and selected photosynthetic parameters will be presented.
- OSTI ID:
- 5628983
- Report Number(s):
- CONF-9007196-; CODEN: PPYSA
- Journal Information:
- Plant Physiology, Supplement; (USA), Vol. 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (USA), 29 Jul - 2 Aug 1990; ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLAVENOIDS
BIOLOGICAL EFFECTS
ULTRAVIOLET RADIATION
BARLEY
GLYCINE HISPIDA
PLANT GROWTH
CEREALS
ELECTROMAGNETIC RADIATION
GRAMINEAE
GROWTH
LEGUMINOSAE
LILIOPSIDA
MAGNOLIOPHYTA
MAGNOLIOPSIDA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PLANTS
RADIATIONS
550200* - Biochemistry