Exogenous Nitric Oxide Delays Plant Regeneration from Protoplast and Protonema Development in .

Nitric oxide (NO) has been recognized as a major player in the regulation of plant physiology and development. NO regulates cell cycle progression and cell elongation in flowering plants and green algae, although the information about NO function in non-vascular plants is scarce. Here, we analyze the effect of exogenous NO on protonema growth.

The nitric oxide production in the moss Physcomitrella patens is mediated by nitrate reductase.

During the last 20 years multiple roles of the nitric oxide gas (•NO) have been uncovered in plant growth, development and many physiological processes. In seed plants the enzymatic synthesis of •NO is mediated by a nitric oxide synthase (NOS)-like activity performed by a still unknown enzyme(s) and nitrate reductase (NR). In green algae the •NO production has been linked only to NR activity, although a NOS gene was reported for Ostreococcus tauri and O.

In silico characterization of a nitrate reductase gene family and analysis of the predicted proteins from the moss Physcomitrella patens.

Assimilatory nitrate reductase (NR; EC 1.7.1.