Physiological and molecular characterization of aluminum resistance in Medicago truncatula.

BMC Plant Biology
Divya ChandranDeborah A Samac

Abstract

Aluminum (Al) toxicity is an important factor limiting crop production on acid soils. However, little is known about the mechanisms by which legumes respond to and resist Al stress. To explore the mechanisms of Al toxicity and resistance in legumes, we compared the impact of Al stress in Al-resistant and Al-sensitive lines of the model legume, Medicago truncatula Gaertn. A screen for Al resistance in 54 M. truncatula accessions identified eight Al-resistant and eight Al-sensitive lines. Comparisons of hydroponic root growth and root tip hematoxylin staining in an Al-resistant line, T32, and an Al-sensitive line, S70, provided evidence that an inducible Al exclusion mechanism occurs in T32. Transcriptional events associated with the Al resistance response were analyzed in T32 and S70 after 12 and 48 h Al treatment using oligonucleotide microarrays. Fewer genes were differentially regulated in response to Al in T32 compared to S70. Expression patterns of oxidative stress-related genes, stress-response genes and microscopic examination of Al-treated root tips suggested a lower degree of Al-induced oxidative damage to T32 root tips compared to S70. Furthermore, genes associated with cell death, senescence, and cell wall degradation...Continue Reading

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Citations

Jul 19, 2012·World Journal of Microbiology & Biotechnology·Hongjuan NianLimei Chen
Oct 22, 2010·Genome Génome / Conseil National De Recherches Canada·Dechassa DuressaDongquan Chen
Aug 24, 2010·BMC Plant Biology·Nadine GriselChristoph Sperisen
Oct 19, 2010·International Journal of Plant Genomics·Dechassa DuressaDongquan Chen
Jul 16, 2014·Plant Cell Reports·Patrik MészárosIldikó Matušíková
Sep 25, 2012·Plant Physiology and Biochemistry : PPB·Achref AlouiDominique Morandi
Aug 19, 2015·Frontiers in Plant Science·Ana B Mendoza-SotoGeorgina Hernández
Apr 28, 2017·Molecular Plant-microbe Interactions : MPMI·Subbaiah C ChalivendraKenneth E Damann
Feb 15, 2017·PeerJ·Kiflemariam Y Belachew, Frederick L Stoddard

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Datasets Mentioned

BETA
PI577613
ABB47036

Methods Mentioned

BETA
reverse-transcription PCR
PCR
transgenic
light microscopy
chips

Software Mentioned

Primer Express
tBLASTx
Tentative Annotation

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