Recommend Plant Signaling & Behavior (PS&B) to your librarian for 2008. Download form here.
Sign up for Table of Contents Alerts!
PS&B is the official journal of the Society for Plant Neurobiology. Full membership ($60 annually) and student membership ($30 annually) include online access to the journal. Click here to join.
Email this page
Print this page
Article Addendum
Fungal Endophyte Production of Reactive Oxygen Species is Critical for Maintaining the Mutualistic Symbiotic Interaction Between Epichloë festucae and Perennial Ryegrass
Barry Scott, Daigo Takemoto and Aiko Tanaka
volume 2 | issue 3
may/june 2007Pages: 171 - 173
We now provide open access to journal articles published online for one year or more. This article may be downloaded at the following link:
Download PDF If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.
Key requirements for microbes to initiate and establish mutualistic symbiotic interactions with plants are evasion of potential host defense responses and strict control of microbial growth. We have recently shown that reactive oxygen species (ROS) produced by a specific fungal NADPH oxidase isoform NoxA, have a critical role in regulating hyphal growth in the mutualistic interaction between Epichloë festucae and perennial ryegrass. Regulation of ROS production in the symbiosis requires two additional components, NoxR and RacA, homologues of the mammalian p67phox and Rac2. Perennial ryegrass host plants containing noxA or noxR mutants lose apical dominance, become severely stunted, and undergo precocious senescence. Our working model proposes that hyphal tip growth and branching is controlled by localized bursts of ROS catalysed by NoxA, following recruitment of NoxR and RacA from the cytosol to the membrane in response to signaling from the grass host.
Authors
Barry Scott
Massey University, Palmerston North, New Zealand
Daigo Takemoto
Massey University, Palmerston North, New Zealand
Aiko Tanaka
Massey University, Palmerston North, New Zealand
We now provide open access to journal articles published online for one year or more. This article may be downloaded at the following link:
Download PDF If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.