Document Detail

Identification of mRNA transcript and screening of amino acids in response to interaction of salinity and nitrate in aquatic fern Azolla caroliniana.
MedLine Citation:
PMID:  22695523     Owner:  NLM     Status:  In-Data-Review    
The mechanisms by which Azolla caroliniana respond to salt stress in absence and presence of nitrate is investigated. Screening of amino acid and differential display is used to compare overall differences in gene expression between salinity-stressed and unstressed Azolla caroliniana by quantitative reverse transcriptase polymerase chain reaction (RT-PC R). Results showed that under saline conditions, aspartic acid, glutamic acid, alanine and leucine were the amino acids found to be abundant in Azolla caroliniana, accounting for 11.26%, 8.66%, 9.43%, and 12.36%, respectively. Following salinity stress, a decrease in free glutamate concomitant with a parallel decrease in free proline was indeed evident. Interaction between nitrate and salinity stress increased proline content significantly. By screening a cDNA library, we have identified protein products by homology with known proteins. The RNA transcripts encoding protein influencing secondary metabolites and vacuolar Na+/H+ antiporter that facilitate the transport system. The databasematched under interaction of nitrate and 50 mM NaCl were associated with wall biosynthesis, disease resistance, metabolite transport and protein regulator, other gene for metabolism of steroids and secondary transport. Results obtained from this research could represent a key step in understanding the molecular mechanism of salt tolerance of Azolla caroliniana in the presence and absence of nitrate.
A A Tammam; E M Mostafa
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta biologica Hungarica     Volume:  63     ISSN:  0236-5383     ISO Abbreviation:  Acta. Biol. Hung.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-06-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8404358     Medline TA:  Acta Biol Hung     Country:  Hungary    
Other Details:
Languages:  eng     Pagination:  250-67     Citation Subset:  IM    
Alexandria University Department of Botany and Microbiology, Faculty of Science 21511 Alexandria Egypt.
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