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J Plant Physiol. 2004 Jul;161(7):777-83.

Comparative effects of various nitric oxide donors on ferritin regulation, programmed cell death, and cell redox state in plant cells.

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  • 1Sezione di Fisiologia e Biochimica delle Piante, Dipartimento di Biologia, Universit√† degli Studi di Milano, via Celoria, Milano, Italy. irene.murgia@unimi.it


Past studies investigating the regulatory functions of nitric oxide (NO) in plant cells have utilized various NO-donors that release NO in different redox forms, which has lead to problems in the interpretation of data. In the present study, the effects of different NO-donors releasing NO with either NO+ (SNP) or NO' (SNAP, GSNO, NOC-18) character have been compared in plant cells. In particular, ferritin regulation, programmed cell death, cellular redox state, and ROS-scavenging enzymes in Arabidopsis thaliana and Nicotiana tabacum cells were examined. The results show that SNP behaves differently than the other NO-donors tested; indeed, SNP induces accumulation of ferritin transcripts in Arabidopsis, whereas SNAP inhibits its accumulation. Moreover, among the assortment of donors tested, only SNP caused programmed cell death and suppression of ROS-scavenging systems.

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