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TRANSCRIPT EXPRESSION
PROFILING OF ANNEXIN MULTIGENE
 FAMILY IN RICE Oryza sativa GROUP
indica cv. IR64 , N22, PRH 10 and Pusa
 Sugandh UNDER DROUGHT STRESS




                                        By:
                  Prathu Raj Singh Kushwah
Problem Statement
   Research has shown an up-regulation of plant
    Annexins under different abiotic stress responses as
    they mediate in Calcium signalling pathways.
   Expression profiling study of Arabidopsis Annexin
    genes demonstrated the differential expression under
    various abiotic stresses (Barthakur et al., 2006).
   Recently Jami et al. (2008) showed that ectopic
    expression of an annexin from Brassica juncea
    confers drought tolerance in transgenic tobacco
    plants.
   However, no direct research has been conducted
    using RT-PCR based expression analysis of different
    members of indica rice annexin gene family under
    normal growth conditions and abiotic stresses.
Significance
   Present Study aims at establishing role of annexin
    multigene family under drought stress.
   The identification and isolation of genes associated
    with drought stress tolerance is of major importance in
    order to better understand this trait and increase the
    efficiency in developing drought stress resistant
    varieties.
   Some of the varieties used in my study are already
    drought resistant so their study could help me confirm
    the role of annexins in drought stress.
   This study could go deeper into study of vrious abiotic
    stresses in plants such as Temperature, Chemical
    Stresses and high wind exposure.
Literature Review
   Abiotic Stress effects
   Genetic elements involved
   Annexins
ENVIRONMENTAL STRESS
              (ABIOTIC)    (BIOTIC)



                STRESS RESPONSE




RESISTANCE           SUSCEPTIBILITY   AVOIDANCE



ACCLIMATION           SENESCENCE
                                      SURVIVAL


 GROWTH                 DEATH



 SURVIVAL
Genetic Involvement




Allelic variation in genes that underlie the adaptive responses should be useful
    in breeding programs for improved stress tolerance (Lafitte et al., 2004)
Annexins
   Annexins are multigene, multifunctional family of proteins with a
    broad taxonomic distribution capable of Ca2+ -dependent and Ca2+ -
    independent binding to endomembrane and plasma membrane.
   Members of the annexin protein family have been continuing to
    grow since their association with intracellular membranes was first
    reported in 1977. Their ability to “annex” or aggregate membranes
    at certain Ca2+ concentrations led to the initial interest in these
    proteins as components in Ca2+ - mediated secretion.
   First discovery of plant annexins was made by Boustead et al.
    (1989) from suspension culture of tomato (Lycopersicon
    esculentum) cells.
   Over 200 unique annexin sequences have been described in more
    than 65 species covering plants, fungi, protists, higher vertebrates,
    and also in a prokaryote (Morgan et al., 2006).
Location of Annexins




Structure of Annexins
Functions of Annexins
Anticipated functions of plant annexins are
   Sensor  and channel activity
   Exocytosis
   Growth and development
   Actin binding
   Peroxidase activity
   ATPase and GTPase activity
   Annexins and reactive oxygen species
   Light responses and nyctinastic movement
   Responding to stress stimuli and pathogens
Expression Profiling
   Expression profiling based on RT-PCR, Northern blotting
    and quantitative real time PCR is one of the major aspect
    to study the expression of various genes in response to
    various abiotic and biotic factors.
   These factors result in down-regulation and up-regulation
    of genes in various phases of the life cycle of the plant.
    Expression profiling help us in finding the level of various
    genes expressed in different parts of the plants, in different
    time period.
   Expression profiling study of Arabidopsis annexin genes
    demonstrated the differential expression under various
    abiotic stresses (Barthakur et al., 2006). Recently Jami et
    al. (2008) showed that ectopic expression of an annexin
    from Brassica juncea confers drought tolerance in
Objective                Hypothesis

To perform transcript      As      annexins     are
expression profiling by   supposed to have role
Reverse Transcriptase     in calcium mediated
Polymerase        Chain
Reaction (RT-PCR) of      signal       transduction
seven members of          cascades, in drought
indica rice annexin       stress we should have
gene family from a        diffrential expression of
drought       sensitive
cultivars N22, Pusa       different members of
sugandh, PRH10 and        Annexin         multigene
IR64 under normal         family.
growth conditions and
drought stress.
Work Plan
   Grow different species of rice uptill 10 day old seedling stage.
   Give them drought stress for 3, 6, 9 and 12 days respectively
    (keeping 0 day as Control and also different controls for 3, 6,
    9 and 12 days respectively.
   Isolate RNA from Different Samples and perform RT-PCR to
    get required cDNAs.
   Perform end point expression profiling using seven Annexin
    primers for each sample (Use 3 tubes for each reaction)
   Compare the band intensity for characterizing Up Regulation
    or Down Regulation of different annexins.
   Confirm the validity of Hypothesis and try to establish roles of
    different annexins.
Evaluation of
Drought Stress
                                           quality of RNA
Treatment and
 Harvesting of                 RNA             by gel
                                          electrophoresis
Rice Seedlings               Isolation



                       Process            Removal of DNA

    Checking of
                      Descriptio            from RNA
                                           samples (via
    Various PCR
  products for up
                          n                   DNAse
                                            treatment)
   regulation and     Amplification of
 down regulation of    target cDNA by
    various gene         PCR, with 7
      primers         different primers
                         for different
                                            cDNA
                         members of       Synthesis
                        AnnOSI gene
Experimental Design
Rice pots (2x4x9)                      cDNA Samples
                                          (72)
 Significance             Treatments

                Variety




                                       PCR Reactions
                                         (72x7)


 Final Results (4x2)
Timeline:
             Job                        Time
   Pots Growth (Start line)            2 Weeks
   Treatment & Collection              2 weeks
   RNA Isolation & DNAse               2 Weeks
         Treatment
RT PCR, & cDNA quantification          1 Week
   Primer Standardization              3 Weeks
       PCR Reactions                   6 Weeks
       Data Collection                 2 Weeks
 Reporting & literature review         3 Weeks
             Total               19 Weeks (~5 Months)
Costs:
         Reagents              Cost (US$)

        Seeds and Soil           200.00

Qiagen RNAeasy plant minikit     620.00

    One Step RT PCR Kit          527.00

          Primers                98.00

     Promega PCR MM             1212.00

       Lab Supplies              400.00

          Agarose                137.69

            Total               3194.69
Limits
   Use of Drought stress only for Oryza Sativa
    Indica Varieties.
   No direct analyses of loss or gain of function.
References
   Boustead C M Smallwood M Small H Bowels D J and Walker J H
           (1989) Identification of calcium-dependent phospholipid- binding proteins
           in higher plant cells. Federation of European    Biochemical     Societies.
           244(2): 456-460.
   Lafitte H R Ismail A Bennett J (2004) Abiotic           stress   tolerance      in
           rice for Asia: progress        and      future. Proceedings of the 4th
           International Crop Science Congress, 26th        September-         10th
           October 2004, Brisbane, Australia.
   Levitt J (1972) Responses of plants to environmental stresses. Academic
    Press,           New York
   Morgan R O Martin Almedina S Garcia M Jhoncon-                   Kooyip          J
    Fernadez M (2006)           Deciphering        function and mechanism of
           calcium-binding proteins from           their    evolutionary
           imprints. Biochemica et        Biophysica        Acta 1763:         1238-
           1249.
   Price A Cairns J Horton P et al (2002) Linking drought-resistance
    mechanisms to               drought avoidance in upland rice using a QTL
    approach: progress and new            opportunities to integrate stomatal and
    mesophyll responses. Journal Experimental Botany 53:989–1004.
Thank
 You!
  

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Proposal for student

  • 1. TRANSCRIPT EXPRESSION PROFILING OF ANNEXIN MULTIGENE FAMILY IN RICE Oryza sativa GROUP indica cv. IR64 , N22, PRH 10 and Pusa Sugandh UNDER DROUGHT STRESS By: Prathu Raj Singh Kushwah
  • 2. Problem Statement  Research has shown an up-regulation of plant Annexins under different abiotic stress responses as they mediate in Calcium signalling pathways.  Expression profiling study of Arabidopsis Annexin genes demonstrated the differential expression under various abiotic stresses (Barthakur et al., 2006).  Recently Jami et al. (2008) showed that ectopic expression of an annexin from Brassica juncea confers drought tolerance in transgenic tobacco plants.  However, no direct research has been conducted using RT-PCR based expression analysis of different members of indica rice annexin gene family under normal growth conditions and abiotic stresses.
  • 3. Significance  Present Study aims at establishing role of annexin multigene family under drought stress.  The identification and isolation of genes associated with drought stress tolerance is of major importance in order to better understand this trait and increase the efficiency in developing drought stress resistant varieties.  Some of the varieties used in my study are already drought resistant so their study could help me confirm the role of annexins in drought stress.  This study could go deeper into study of vrious abiotic stresses in plants such as Temperature, Chemical Stresses and high wind exposure.
  • 4. Literature Review  Abiotic Stress effects  Genetic elements involved  Annexins
  • 5. ENVIRONMENTAL STRESS (ABIOTIC) (BIOTIC) STRESS RESPONSE RESISTANCE SUSCEPTIBILITY AVOIDANCE ACCLIMATION SENESCENCE SURVIVAL GROWTH DEATH SURVIVAL
  • 6. Genetic Involvement Allelic variation in genes that underlie the adaptive responses should be useful in breeding programs for improved stress tolerance (Lafitte et al., 2004)
  • 7. Annexins  Annexins are multigene, multifunctional family of proteins with a broad taxonomic distribution capable of Ca2+ -dependent and Ca2+ - independent binding to endomembrane and plasma membrane.  Members of the annexin protein family have been continuing to grow since their association with intracellular membranes was first reported in 1977. Their ability to “annex” or aggregate membranes at certain Ca2+ concentrations led to the initial interest in these proteins as components in Ca2+ - mediated secretion.  First discovery of plant annexins was made by Boustead et al. (1989) from suspension culture of tomato (Lycopersicon esculentum) cells.  Over 200 unique annexin sequences have been described in more than 65 species covering plants, fungi, protists, higher vertebrates, and also in a prokaryote (Morgan et al., 2006).
  • 9. Functions of Annexins Anticipated functions of plant annexins are  Sensor and channel activity  Exocytosis  Growth and development  Actin binding  Peroxidase activity  ATPase and GTPase activity  Annexins and reactive oxygen species  Light responses and nyctinastic movement  Responding to stress stimuli and pathogens
  • 10. Expression Profiling  Expression profiling based on RT-PCR, Northern blotting and quantitative real time PCR is one of the major aspect to study the expression of various genes in response to various abiotic and biotic factors.  These factors result in down-regulation and up-regulation of genes in various phases of the life cycle of the plant. Expression profiling help us in finding the level of various genes expressed in different parts of the plants, in different time period.  Expression profiling study of Arabidopsis annexin genes demonstrated the differential expression under various abiotic stresses (Barthakur et al., 2006). Recently Jami et al. (2008) showed that ectopic expression of an annexin from Brassica juncea confers drought tolerance in
  • 11. Objective Hypothesis To perform transcript As annexins are expression profiling by supposed to have role Reverse Transcriptase in calcium mediated Polymerase Chain Reaction (RT-PCR) of signal transduction seven members of cascades, in drought indica rice annexin stress we should have gene family from a diffrential expression of drought sensitive cultivars N22, Pusa different members of sugandh, PRH10 and Annexin multigene IR64 under normal family. growth conditions and drought stress.
  • 12. Work Plan  Grow different species of rice uptill 10 day old seedling stage.  Give them drought stress for 3, 6, 9 and 12 days respectively (keeping 0 day as Control and also different controls for 3, 6, 9 and 12 days respectively.  Isolate RNA from Different Samples and perform RT-PCR to get required cDNAs.  Perform end point expression profiling using seven Annexin primers for each sample (Use 3 tubes for each reaction)  Compare the band intensity for characterizing Up Regulation or Down Regulation of different annexins.  Confirm the validity of Hypothesis and try to establish roles of different annexins.
  • 13. Evaluation of Drought Stress quality of RNA Treatment and Harvesting of RNA by gel electrophoresis Rice Seedlings Isolation Process Removal of DNA Checking of Descriptio from RNA samples (via Various PCR products for up n DNAse treatment) regulation and Amplification of down regulation of target cDNA by various gene PCR, with 7 primers different primers for different cDNA members of Synthesis AnnOSI gene
  • 14. Experimental Design Rice pots (2x4x9) cDNA Samples (72) Significance Treatments Variety PCR Reactions (72x7) Final Results (4x2)
  • 15. Timeline: Job Time Pots Growth (Start line) 2 Weeks Treatment & Collection 2 weeks RNA Isolation & DNAse 2 Weeks Treatment RT PCR, & cDNA quantification 1 Week Primer Standardization 3 Weeks PCR Reactions 6 Weeks Data Collection 2 Weeks Reporting & literature review 3 Weeks Total 19 Weeks (~5 Months)
  • 16. Costs: Reagents Cost (US$) Seeds and Soil 200.00 Qiagen RNAeasy plant minikit 620.00 One Step RT PCR Kit 527.00 Primers 98.00 Promega PCR MM 1212.00 Lab Supplies 400.00 Agarose 137.69 Total 3194.69
  • 17. Limits  Use of Drought stress only for Oryza Sativa Indica Varieties.  No direct analyses of loss or gain of function.
  • 18. References  Boustead C M Smallwood M Small H Bowels D J and Walker J H (1989) Identification of calcium-dependent phospholipid- binding proteins in higher plant cells. Federation of European Biochemical Societies. 244(2): 456-460.  Lafitte H R Ismail A Bennett J (2004) Abiotic stress tolerance in rice for Asia: progress and future. Proceedings of the 4th International Crop Science Congress, 26th September- 10th October 2004, Brisbane, Australia.  Levitt J (1972) Responses of plants to environmental stresses. Academic Press, New York  Morgan R O Martin Almedina S Garcia M Jhoncon- Kooyip J Fernadez M (2006) Deciphering function and mechanism of calcium-binding proteins from their evolutionary imprints. Biochemica et Biophysica Acta 1763: 1238- 1249.  Price A Cairns J Horton P et al (2002) Linking drought-resistance mechanisms to drought avoidance in upland rice using a QTL approach: progress and new opportunities to integrate stomatal and mesophyll responses. Journal Experimental Botany 53:989–1004.
  • 19. Thank You!