期刊
PLANT CELL AND ENVIRONMENT
卷 33, 期 6, 页码 914-925出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-3040.2010.02116.x
关键词
abscisic acid; antioxidants; Arabidopsis thaliana natural accessions; jasmonate; ozone-sensitive mutants; QTL - quantitative trait loci; RIL - recombinant inbred line; salicylic acid; visible injury
资金
- Estonian Science Foundation [7763, 7361, 6462]
- Estonian Ministry of Education and Research [SF0180071s07]
- Academy of Finland
- Helsinki University Environmental Research Centre
- Academy of Finland [108760]
- Academy of Finland (AKA) [108760, 108760] Funding Source: Academy of Finland (AKA)
Genetic variation between naturally occurring populations provides a unique source to unravel the complex mechanisms of stress tolerance. Here, we have analysed O(3) sensitivity of 93 natural Arabidopsis thaliana accessions together with five O(3)-sensitive mutants to acute O(3) exposure. The variation in O(3) sensitivity among the natural accessions was much higher than among the O(3)-sensitive mutants and corresponding wild types. A subset of nine accessions with major variation in their O(3) responses was studied in more detail. Among the traits assayed, stomatal conductance (g(st)) was an important factor determining O(3) sensitivity of the selected accessions. The most O(3)-sensitive accession, Cvi-0, had constitutively high g(st), leading to high initial O(3) uptake rate and dose received during the first 30 min of exposure. Analyzing O(3)-induced changes in stress hormone concentrations indicated that jasmonate (JA) concentration was also positively correlated with leaf damage. Quantitative trait loci (QTL) mapping in a Col-0 x Cvi-0 recombinant inbred line (RIL) population identified three QTLs for O(3) sensitivity, and one for high water loss of Cvi-0. The major O(3) QTL mapped to the same position as the water loss QTL further supporting the role of stomata in regulating O(3) entry and damage.
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