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Molecular Basis of Root Nodule Symbiosis between Bradyrhizobium and ‘Crack-Entry’ Legume Groundnut (Arachis hypogaea L.)

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Relation http://oar.icrisat.org/11526/
https://doi.org/10.3390/plants9020276
doi:10.3390/plants9020276
 
Title Molecular Basis of Root Nodule Symbiosis between Bradyrhizobium and ‘Crack-Entry’ Legume Groundnut (Arachis hypogaea L.)
 
Creator Sharma, V
Bhattacharyya, S
Kumar, R
Kumar, A
Ibañez, F
Wang, J
Guo, B
Sudini, H K
Gopalakrishnan, S
DasGupta, M
Varshney, R K
Pandey, M K
 
Subject Pest Management
Groundnut
Genetics and Genomics
Legume Crops
 
Description Nitrogen is one of the essential plant nutrients and a major factor limiting crop
productivity. To meet the requirements of sustainable agriculture, there is a need to maximize
biological nitrogen fixation in different crop species. Legumes are able to establish root nodule
symbiosis (RNS) with nitrogen-fixing soil bacteria which are collectively called rhizobia. This
mutualistic association is highly specific, and each rhizobia species/strain interacts with only a
specific group of legumes, and vice versa. Nodulation involves multiple phases of interactions
ranging from initial bacterial attachment and infection establishment to late nodule development,
characterized by a complex molecular signalling between plants and rhizobia. Characteristically,
legumes like groundnut display a bacterial invasion strategy popularly known as “crack-entry’’
mechanism, which is reported approximately in 25% of all legumes. This article accommodates
critical discussions on the bacterial infection mode, dynamics of nodulation, components of
symbiotic signalling pathway, and also the effects of abiotic stresses and phytohormone
homeostasis related to the root nodule symbiosis of groundnut and Bradyrhizobium. These
parameters can help to understand how groundnut RNS is programmed to recognize and establish
symbiotic relationships with rhizobia, adjusting gene expression in response to various regulations.
This review further attempts to emphasize the current understanding of advancements regarding
RNS research in the groundnut and speculates on prospective improvement possibilities in addition
to ways for expanding it to other crops towards achieving sustainable agriculture and overcoming
environmental challenges.
 
Publisher MDPI
 
Date 2020-02
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11526/1/Vinay%20Sharma%20et%20al.%202020.pdf
Sharma, V and Bhattacharyya, S and Kumar, R and Kumar, A and Ibañez, F and Wang, J and Guo, B and Sudini, H K and Gopalakrishnan, S and DasGupta, M and Varshney, R K and Pandey, M K (2020) Molecular Basis of Root Nodule Symbiosis between Bradyrhizobium and ‘Crack-Entry’ Legume Groundnut (Arachis hypogaea L.). Plants, 9 (276). pp. 1-24. ISSN 2223-7747