The Role of Nitric Oxide in Plants

Studies on the role of nitric oxide (NO) in plants have gained considerable attention in recent years because of its function in plant growth and development. A review published by the journal Plant, Cell and Environment summarizes the recent breakthroughs in the field of NO research. NO is a key signaling molecule in several intracellular processes. It has been implicated in different physiological responses such as closing and opening of stomata (pores in plant leaves for gas exchange) and seed germination. Although the studies concerning NO synthesis and signaling in animals are well-advanced, its synthesis and mode of action is not well-understood in plants. The compound is difficult to study because of its highly reactive nature. Scientists are yet to determine the exact enzyme responsible for its synthesis in plants. Likewise, they are yet to elucidate the exact mechanisms on how NO affects gene expression. NO research may prompt the development of new plant varieties resistant to abiotic stresses like drought and salinity.

The abstract of the review, including links to the complete article is available at http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3040.2007.01761.x