Affordable Access

Control of NO level in rhizobium-legume root nodules: not only a plant globin story.

Authors
  • Meilhoc, Eliane
  • Blanquet, Pauline
  • Cam, Yvan
  • Bruand, Claude
Type
Published Article
Journal
Plant Signaling & Behavior
Publisher
Landes Bioscience
Publication Date
Oct 01, 2013
Volume
8
Issue
10
Identifiers
PMID: 23962798
Source
Medline
License
Unknown

Abstract

Nitric oxide (NO ) is a gaseous signaling molecule which plays both regulatory and defense roles in animals and plants. In the symbiosis between legumes and rhizobia, NO has been shown to be involved in bacterial infection and nodule development steps as well as in mature nodule functioning. We recently showed that an increase in NO level inside Medicago truncatula root nodules also could trigger premature nodule senescence. Here we discuss the importance of the bacterial Sinorhizobium meliloti flavohemoglobin to finely tune the NO level inside nodules and further, we demonstrate that S. meliloti possesses at least two non redundant ways to control NO and that both systems are necessary to maintain efficient nitrogen fixing activity.

Report this publication

Statistics

Seen <100 times