Document Detail

Aluminium localization and toxicity symptoms related to root growth inhibition in rice (Oryza sativa L.) seedlings.
MedLine Citation:
PMID:  23151797     Owner:  NLM     Status:  In-Data-Review    
We correlated root growth inhibition with aluminium (Al3+) localization and toxicity symptoms in rice roots using seedlings of two genotypes (tolerant and sensitive) that were exposed to different AlCl3 concentrations. Al3+ localization was evaluated by hematoxylin in primary roots and by morin in cross-sections of the root tips. Neutral invertase enzyme activity and callose (1 -- 3, beta-D-glucan) accumulation were observed and compared with Al3+ accumulation sites. Root growth was inhibited by Al3+ in a concentration-specific manner and proportional to the increase of hematoxylin staining, being more pronounced in the sensitive genotype. Morin staining showed the presence of Al3+ deep within the roots of the sensitive genotype, indicating that the metal was able to penetrate beyond the first few cell layers. In the tolerant genotype, Al3+ penetration was restricted to the first two cell layers. Ruptures in exodermis and epidermis layers by lateral root protrusions in both genotypes allowed Al3+ to enter into the roots. More intense activity of invertase in roots of the tolerant genotype was also observed, which could be related to greater root growth of this cultivar when submitted to Al3+ stress. Moreover, Al3+-induced callose accumulation was a late response occurring in the same areas where Al3+ was present.
M N Alvim; F T Ramos; D C Oliveira; R M S Isaias; M G C Franca
Related Documents :
16347277 - Production of microbial biomass protein from potato processing wastes by cephalosporium...
18584667 - Improvements in ethanol tolerance of kluyveromyces fragilis in jerusalem artichoke juice.
24561627 - Advanced treatment of biologically pretreated coal gasification wastewater using a nove...
23523907 - Novel application of the nonmetallic fraction of the recycled printed circuit boards as...
17396407 - Inhibitory effect of a surfactant on pure cultures of a filamentous and a floc forming ...
18952217 - Analysis of industrial contaminants in indoor air. part 2. emergent contaminants and pe...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biosciences     Volume:  37     ISSN:  0973-7138     ISO Abbreviation:  J. Biosci.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8100809     Medline TA:  J Biosci     Country:  India    
Other Details:
Languages:  eng     Pagination:  1079-88     Citation Subset:  IM    
Federal University of Minas Gerais (UFMG), Biological Science Institute, 31270-901, Belo Horizonte, MG, Brazil.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Rates and pattern of ovule abortion vis-a-vis in situ pollen germination in some populations of Trif...
Next Document:  What in silico molecular docking can do for the 'bench-working biologists'.