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Comparative morphophysiological analyses and molecular profiling reveal Pi-efficient strategies of a traditional rice genotype

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Title Comparative morphophysiological analyses and molecular profiling reveal Pi-efficient strategies of a traditional rice genotype
 
Creator Mehra, Poonam
Pandey, Bipin K.
Giri, Jitender
 
Subject metabolic flexibility
microarray
lipidomics
root system architecture (RSA)
phosphate
 
Description Accepted date: 10 December 2015
Phosphate (Pi) deficiency severely affects crop yield. Modern high yielding rice genotypes are sensitive to Pi deficiency whereas traditional rice genotypes are naturally compatible with low Pi ecosystems. However, the underlying molecular mechanisms for low Pi tolerance in traditional genotypes remain largely elusive. To delineate the molecular mechanisms for low Pi tolerance, two contrasting rice genotypes, Dular (low Pi tolerant), and PB1 (low Pi sensitive), have been selected. Comparative morphophysiological, global transcriptome and lipidome analyses of root and shoot tissues of both genotypes grown under Pi deficient and sufficient conditions revealed potential low Pi tolerance mechanisms of the traditional genotype. Most of the genes associated with enhanced internal Pi utilization (phospholipid remobilization) and modulation of root system architecture (RSA) were highly induced in the traditional rice genotype, Dular. Higher reserves of phospholipids and greater accumulation of galactolipids under low Pi in Dular indicated it has more efficient Pi utilization. Furthermore, Dular also maintained greater root growth than PB1 under low Pi, resulting in larger root surface area due to increased lateral root density and root hair length. Genes involved in enhanced low Pi tolerance of the traditional genotype can be exploited to improve the low Pi tolerance of modern high yielding rice cultivars.
This work was supported by the research grant of DBT
(Grant No. BT/PR3299/AGR/2/813/2011), Ministry of
Science and Technology, Government of India. PM and
BP acknowledge the research fellowship by CSIR and DBT,
respectively. We thank Prof. Jonathan Lynch and Prof. Akhilesh
K. Tyagi for valuable suggestions and critical readings of
manuscript.
 
Date 2016-01-28T05:41:52Z
2016-01-28T05:41:52Z
2016
 
Type Article
 
Identifier Front. Plant Sc., 6: 1184
1664-462X
http://172.16.0.77:8080/jspui/handle/123456789/599
http://journal.frontiersin.org/article/10.3389/fpls.2015.01184/full
10.3389/fpls.2015.01184
 
Language en_US
 
Publisher Frontiers Media S.A.