NDLI: A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

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A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

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A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

Content Provider	PubMed Central
Author	Dudley, M. E. Long, S. R.
Abstract	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.
Related Links	http://dx.doi.org/10.1105/tpc.1.1.65
Ending Page	72
Page Count	8
Starting Page	65
File Format	PDF
ISSN	10404651
e-ISSN	1532298X
Journal	The Plant Cell
Issue Number	1
Volume Number	1
Language	English
Publisher Date	1989-01-01
Access Restriction	Open
Subject Keyword	Plant Science Cell Biology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

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A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

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A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.

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