open access

https://hdl.handle.net/2115/64676

Involvement of nitric oxide (NO) in signal transduction of stomatal opening

英語

vicia faba

2001

CSIRO

Proceedings of the 12th International Congress on Photosynthesis

3(1)

S27-009

The stomatal aperture responds to a range of stimuli including light, humidity, CO2, growth regulators and air pollutants. Many papers have conclusively shown that complex signal transduction pathways in guard cells are involved in the regulation of stomatal movements (Schroeder et al 2001; Zeiger 1990). Howerver, the molecular mechanisms for sensing this variety of stimuli has not yet been revealed. Recent papers have suggested that hydrogen peroxide (H2O2) is involved in abscisic acid-induced stomatal closing (Pei et al 2000). H2O2 is a reactive oxygen species (ROS) that can diffuse across lipid bilayers, thereby functioning as an intra- and intercellular signaling molecule in plants and animals (Corpas et al 2001; Finkel 1998). In addition to ROS, NO has attracted considerable interest as another diffusable signaling molecule in animal cells. NO is produced within animal cells and exhibits diverse physiological functions including signal transduction, enzyme regulation and immune response (Knowles and Moncada 1994). It is now evident that NO plays essential roles in animal physiology. Although there is an increasing number of reports indicating that NO could also participate in many physiological responses of plants: pathogen response, programmed cell death and growth (Delledonne et al 1998; Durner and Klessig 1999), our understanding of NO in plants is still very limited. Here we demonstrate that NO is involved in the signal transduction mechanisms for stomatal opening.

会議発表論文

Accepted Manuscript

(C)CSIRO Publishing