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@ARTICLE{Jing:281412,
      author       = {Jing, Liquan and Dombinov, Vitalij and Shen, Shibo and Wu,
                      Yanzhen and Yang, Lianxin and Wang, Yunxia and Frei,
                      Michael},
      title        = {{P}hysiological and genotype-specific factors associated
                      with grain quality changes in rice exposed to high ozone},
      journal      = {Environmental pollution},
      volume       = {210},
      issn         = {0269-7491},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2016-01109},
      pages        = {397 - 408},
      year         = {2016},
      abstract     = {Rising tropospheric ozone concentrations in Asia affect the
                      yield and quality of rice. This study investigated
                      ozone-induced changes in rice grain quality in contrasting
                      rice genotypes, and explored the associated physiological
                      processes during the reproductive growth phase. The ozone
                      sensitive variety Nipponbare and a breeding line (L81)
                      containing two tolerance QTLs in Nipponbare background were
                      exposed to 100 ppb ozone (8 h per day) or control conditions
                      throughout their growth. Ozone affected grain chalkiness and
                      protein concentration and composition. The percentage of
                      chalky grains was significantly increased in Nipponbare but
                      not in L81. Physiological measurements suggested that grain
                      chalkiness was associated with a drop in foliar carbohydrate
                      and nitrogen levels during grain filling, which was less
                      pronounced in the tolerant L81. Grain total protein
                      concentration was significantly increased in the ozone
                      treatment, although the albumin fraction (water soluble
                      protein) decreased. The increase in proteinwas more
                      pronounced in L81, due to increases in the glutelin fraction
                      in this genotype. Amino acids responded differently to the
                      ozone treatment. Three essential amino acids (leucine,
                      methionine and threonine) showed significant increases,
                      while seven showed significant treatment by genotype
                      interactions, mostly due to more positive responses in L81.
                      The trend of increased grain protein was in contrast to
                      foliar nitrogen levels, which were negatively affected by
                      ozone. A negative correlation between grain protein and
                      foliar nitrogen in ozone stress indicated that higher grain
                      protein cannot be explained by a concentration effect in all
                      tissues due to lower biomass production. Rather, ozone
                      exposure affected the nitrogen distribution, as indicated by
                      altered foliar activity of the enzymes involved in nitrogen
                      metabolism, such as glutamine synthetase and
                      glutamine-2-oxoglutarate aminotransferase. Our results
                      demonstrate differential responses of grain quality to ozone
                      due to the presence of tolerance QTL, and partly explain the
                      underlying physiological processes.},
      cin          = {IBG-2},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000376703600046},
      pubmed       = {pmid:26807986},
      doi          = {10.1016/j.envpol.2016.01.023},
      url          = {https://juser.fz-juelich.de/record/281412},
}