8 research outputs found
Heterologous Expression of Serine Hydroxymethyltransferase-3 From Rice Confers Tolerance to Salinity Stress in E. coli and Arabidopsis
Among abiotic stresses, salt stress adversely affects growth and development in rice. Contrasting salt tolerant (CSR27), and salt sensitive (MI48) rice varieties provided information on an array of genes that may contribute for salt tolerance of rice. Earlier studies on transcriptome and proteome profiling led to the identification of salt stress-induced serine hydroxymethyltransferase-3 (SHMT3) gene. In the present study, the SHMT3 gene was isolated from salt-tolerant (CSR27) rice. OsSHMT3 exhibited salinity-stress induced accentuated and differential expression levels in different tissues of rice. OsSHMT3 was overexpressed in Escherichia coli and assayed for enzymatic activity and modeling protein structure. Further, Arabidopsis transgenic plants overexpressing OsSHMT3 exhibited tolerance toward salt stress. Comparative analyses of OsSHMT3 vis a vis wild type by ionomic, transcriptomic, and metabolic profiling, protein expression and analysis of various traits revealed a pivotal role of OsSHMT3 in conferring tolerance toward salt stress. The gene can further be used in developing gene-based markers for salt stress to be employed in marker assisted breeding programs.HIGHLIGHTS- The study provides information on mechanistic details of serine hydroxymethyl transferase gene for its salt tolerance in rice
Development of SCAR based molecular markers for identification of different species of <i style="mso-bidi-font-style:normal">Azolla</i>
489-492Azolla is commonly found in rice paddy fields where it serves as a
biofertilizer and green manure. The conventional methods of identification of Azolla based on the presence or absence
of glochidia on the spores is difficult and cumbersome. In the present study,
therefore, molecular markers based on <span style="mso-fareast-font-family:
Calibri" lang="EN-GB">specific sequence characterized amplified
region (SCAR) primers were developed from the nucleotide sequence of specific
RAPD markers. A single distinct and highly resolved band of 390, 182, 490 and
709 bp, respectively was obtained for Azolla
rubra, A. pinnata, A. filiculoides and <i style="mso-bidi-font-style:
normal">A. microphylla. This confirms the specificity of SCAR primer for
these species. Thus, the development of SCAR marker may aid in the accurate and
precise identification of different species of <i style="mso-bidi-font-style:
normal">Azolla without ambiguity.
</span
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Not AvailableSafety assessment of genetically modified plants is an important aspect prior to deregulation. Demonstration of substantial equivalence of the transgenics compared to their nontransgenic counterparts can be performed using different techniques at various molecular levels. The present study is a first-ever comprehensive evaluation of pigeon pea transgenics harboring two independent cry genes, cry2Aa and cry1AcF. The absence of unintended effects in the transgenic seed components was demonstrated by proteome and nutritional composition profiling. Analysis revealed that no significant differences were found in the various nutritional compositional analyses performed. Additionally, 2-DGE-based proteome analysis of the transgenic and nontransgenic seed protein revealed that there were no major changes in the protein profile, although a minor fold change in the expression of a few proteins was observed. Furthermore, the study also demonstrated that neither the integration of T-DNA nor the expression of the cry genes resulted in the production of unintended effects in the form of new toxins or allergensNot Availabl
Not Available
Not AvailableAmong abiotic stresses, salt stress adversely affects growth and development in rice.
Contrasting salt tolerant (CSR27), and salt sensitive (MI48) rice varieties provided
information on an array of genes that may contribute for salt tolerance of rice. Earlier
studies on transcriptome and proteome profiling led to the identification of salt stressinduced
serine hydroxymethyltransferase-3 (SHMT3) gene. In the present study, the
SHMT3 gene was isolated from salt-tolerant (CSR27) rice. OsSHMT3 exhibited salinitystress
induced accentuated and differential expression levels in different tissues of rice.
OsSHMT3 was overexpressed in Escherichia coli and assayed for enzymatic activity
and modeling protein structure. Further, Arabidopsis transgenic plants overexpressing
OsSHMT3 exhibited tolerance toward salt stress. Comparative analyses of OsSHMT3
vis a vis wild type by ionomic, transcriptomic, and metabolic profiling, protein expression
and analysis of various traits revealed a pivotal role of OsSHMT3 in conferring tolerance
toward salt stress. The gene can further be used in developing gene-based markers for
salt stress to be employed in marker assisted breeding programs.Not Availabl
Comparative Proteomic and Nutritional Composition Analysis of Independent Transgenic Pigeon Pea Seeds Harboring <i>cry1AcF</i> and <i>cry2Aa</i> Genes and Their Nontransgenic Counterparts
Safety
assessment of genetically modified plants is an important
aspect prior to deregulation. Demonstration of substantial equivalence
of the transgenics compared to their nontransgenic counterparts can
be performed using different techniques at various molecular levels.
The present study is a first-ever comprehensive evaluation of pigeon
pea transgenics harboring two independent <i>cry</i> genes, <i>cry2Aa</i> and <i>cry1AcF</i>. The absence of unintended
effects in the transgenic seed components was demonstrated by proteome and
nutritional composition profiling. Analysis revealed that no significant
differences were found in the various nutritional compositional analyses
performed. Additionally, 2-DGE-based proteome analysis of the transgenic
and nontransgenic seed protein revealed that there were no major changes
in the protein profile, although a minor fold change in the expression
of a few proteins was observed. Furthermore, the study also demonstrated
that neither the integration of T-DNA nor the expression of the <i>cry</i> genes resulted in the production of unintended effects
in the form of new toxins or allergens