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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Transcriptome profiling of soybean root tips

Farzad Haerizadeh A , Mohan B. Singh A and Prem L. Bhalla A B
+ Author Affiliations
- Author Affiliations

A Plant Molecular Biology and Biotechnology Laboratory, Australian Research Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Vic. 3010, Australia.

B Corresponding author. Email: premlb@unimelb.edu.au

Functional Plant Biology 38(6) 451-461 https://doi.org/10.1071/FP10230
Submitted: 26 November 2010  Accepted: 30 March 2011   Published: 3 June 2011

Abstract

Soybean (Glycine max L.), a major legume crop, is important to human nutrition and is a source of animal feed. Similar to many legumes, a key feature of the soybean is its symbiotic association with soil bacteria that fix atmospheric nitrogen. However, knowledge of the gene expression of its root system, particularly the root meristematic region, is limited. Here, we have addressed this by investigating the gene expression profile of the soybean root tip, using soybean Affymetrix chips containing 37 500 probe sets (Affymetrix Inc.) and have compared this expression profile with that of the nonmeristematic tissue. We identified a total of 5012 upregulated and 4136 downregulated genes in the soybean root tip. Among the upregulated genes, 559 showed strong preferential expression in the root tip, indicating that they are likely to be associated with root apical meristem specificity and root tip function. Genes involved in membrane transport, defence signalling and metabolism were upregulated in the soybean root tip. Further, our data provide a resource of novel target genes for further studies involving root development and biology, and will possibly have a positive impact on future crop breeding.

Additional keywords: gene expression, Glycine max, legume, root cap, root apical meristem.


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