| A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti. | |
| | |
MedLine Citation:
|
PMID: 2535468 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The early events in the alfalfa-Rhizobium meliloti symbiosis include deformation of epidermal root hairs and the approximately concurrent stimulation of cell dedifferentiation and cell division in the root inner cortex. These early steps have been studied previously by analysis of R. meliloti mutants. Bacterial strains mutated in nodABC, for example, fail to stimulate either root hair curling or cell division events in the plant host, whereas exopolysaccharide (exo) mutants of R. meliloti stimulate host cell division but the resulting nodules are uninfected. As a further approach to understanding early symbiotic interactions, we have investigated the phenotype of a non-nodulating alfalfa mutant, MnNC-1008 (NN) (referred to as MN-1008). Nodulating and non-nodulating plants were inoculated with wild-type R. meliloti and scored for root hair curling and cell divisions. MN-1008 was found to be defective in both responses. Mutant plants inoculated with Exo- bacteria also showed no cell division response. Therefore, the genetic function mutated in MN-1008 is required for both root hair curling and cell division, as is true for the R. meliloti nodABC genes. These observations support the model that the distinct cellular processes of root hair curling and cell division are triggered by related mechanisms or components, or are causally linked. |
| | |
Authors:
|
M E Dudley; S R Long |
Related Documents
:
|
9186008 - Flagellar photoresponses of ptx1, a nonphototactic mutant of chlamydomonas. 7720868 - Sucrose: a solute that accumulates in the guard-cell apoplast and guard-cell symplast o... 14998718 - Ophiopogon root (radix ophiopogonis) prevents ultra-structural damage by so2 in an epit... 10594758 - Association of p63 with proliferative potential in normal and neoplastic human keratino... 12845598 - Gliding movement in peranema trichophorum is powered by flagellar surface motility. 3924688 - Selective destruction of meningeal cells by 6-hydroxydopamine: a tool to study meningea... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: The Plant cell Volume: 1 ISSN: 1040-4651 ISO Abbreviation: Plant Cell Publication Date: 1989 Jan |
Date Detail:
|
Created Date: 1992-10-07 Completed Date: 1992-10-07 Revised Date: 2010-09-09 |
Medline Journal Info:
|
Nlm Unique ID: 9208688 Medline TA: Plant Cell Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 65-72 Citation Subset: IM |
Affiliation:
|
Department of Biological Sciences, Stanford University, California 94305-5020. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Cell Division
/
genetics Medicago sativa / cytology, genetics*, microbiology Mutation* Nitrogen Fixation / genetics Phenotype Sinorhizobium meliloti / physiology* |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Expression of a chimeric polygalacturonase gene in transgenic rin (ripening inhibitor) tomato fruit ...
Next Document: Spatial patterns of gene expression in Brassica napus seedlings: identification of a cortex-specific...