Reproductive, morphological, and phytochemical responses of Arabidopsis thaliana ecotypes to enhanced UV-B radiation

Conference · Wed Jun 01 00:00:00 EDT 1994 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:7162026

Trumbull, V L; McCloud, E S; Paige, K N ^[1]

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1. Univ. of Illinois, Urbana, IL (United States)

Two ecotypes of Arabidopsis thaliana, collected from Libya and Norway, were grown in the greenhouse under. UV-B doses of 0 and 10.5 kJ m[sup [minus]2] UV-B[sub BE]. The high UV-B dose simulated midsummer ambient conditions over Libya and a 40% reduction in stratospheric ozone over Norway. The Libyan ectotype, which originated from latitudes where solar UV-B is high, showed no UV-B induced damage to plant growth. However the Norwegian ecotype, which originated from latitudes where solar UV-B is low, showed a significant reduction in plant height, inflorescence weight, and rosette weight in response to enhanced UV-B. Although fruit and seed number for both ecotypes were unaffected by enhanced UV-B radiation the germination success of the seeds harvested from the irradiated Norwegian plants were significantly reduced. The two ecotypes also differed with respect to their accumulation of kaempferol, a putative UV-B protective filter. The Libyan ecotype increased kaempferol concentration by 38% over the 0 kJ treatment whereas the Norwegian ecotype increased by only 15%. These data suggest that, for these ecotypes, variation in UV-B sensitivity may be explained by the differential induction of UV-absorbing leaf pigments.

• OSTI ID: 7162026
• Report Number(s): CONF-940894-; CODEN: BECLAG
• Journal Information: Bulletin of the Ecological Society of America; (United States), Vol. 75:2; Conference: Annual Ecological Society of America (ESA) meeting: science and public policy, Knoxville, TN (United States), 7-11 Aug 1994; ISSN 0012-9623
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ARABIDOPSIS
BIOLOGICAL RADIATION EFFECTS
GENETIC VARIABILITY
PLANT GROWTH
OZONE
GLOBAL ASPECTS
LIBYA
NORWAY
ULTRAVIOLET RADIATION
AFRICA
ARAB COUNTRIES
BIOLOGICAL EFFECTS
BIOLOGICAL VARIABILITY
DEVELOPED COUNTRIES
DEVELOPING COUNTRIES
ELECTROMAGNETIC RADIATION
EUROPE
GROWTH
MAGNOLIOPHYTA
MAGNOLIOPSIDA
PLANTS
RADIATION EFFECTS
RADIATIONS
SCANDINAVIA
WESTERN EUROPE
560300* - Chemicals Metabolism & Toxicology