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Abstract
Nitric oxide (.NO) acts as signaling molecule in plants being involved in diverse
physiological processes such as germination, root growth, stomata closing and response
to biotic and abiotic stress. S-Nitrosoglutathione (GSNO) is the storage and transport
form of.NO and has a very important function in.NO signaling since it can transfer
its.NO moiety to other proteins (trans-nitrosylation). The level of GSNO and thus
the level of S-nitrosylated proteins are regulated by GSNO-reductase (GSNOR). In this
way, this enzyme regulates the S-nitrosothiol levels and plays a balancing role in
fine-tuning.NO signaling. Interestingly, oxidative post-translationally modification
of GSNOR inhibited the activity of this enzyme suggesting a direct crosstalk between
ROS- and RNS-signaling. In this review article the regulatory effects of ROS on GSNOR
are highlighted and their physiological function in context of crosstalk between ROS
and.NO and species in plants are discussed.