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Anthocyanin Pathway Gene Expression IN Peach ( Prunus persica ) Flowers

Anthocyanin Pathway Gene Expression IN Peach ( Prunus persica ) Flowers. Rashidah H. Farid, AAMU M.S. Student Dr. Tomgming Yin, Host Professor, NFU Danial Hassani , PhD Candidate Mentor, NFU. Outline. Research Topic Importance of Peach Flower Anthocyanin Pathway Literature Review

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Anthocyanin Pathway Gene Expression IN Peach ( Prunus persica ) Flowers

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  1. Anthocyanin Pathway Gene Expression INPeach (Prunuspersica) Flowers Rashidah H. Farid, AAMU M.S. Student Dr. Tomgming Yin, Host Professor, NFU DanialHassani, PhD Candidate Mentor, NFU

  2. Outline • Research Topic • Importance of Peach Flower • Anthocyanin Pathway • Literature Review • Research Purpose • Identified Problems • Methods • Results & Discussion • Personal Goal: CTAB Protocol • Methods • Results • China Experience • Thank You

  3. Importance of Peach Flower

  4. Importance of Peach Flower (delete slide) • Peach blossoms are highly prized in Chinese culture • More vitality than any other tree • Peach rods to protect them from evils • Identifiable by their bright pink flowers increase pollination

  5. Introduction: Anthocyanin Pathway Anthocyanins are a group of reddish-blue, water-soluble pigments common in many flowers, fruits and vegetables. Possible health attributes, such as reduction of coronary heart diseases, antioxidant properties, and anti-cancer activities. Bright coloration essential to pollination. Figure 1. Genes involved in color expression in flowers.

  6. Literature Review • Stanciu, Gabriela al et., 2010, Spectrophotometric study on stability of anthocyanins extracts from black grapes skins., Ovidius University Annals of Chemistry Volume 21, Number 1, pp.101-104, 2010. • Varying factors effect the concentration of anthocyanins: pH, light exposure, temperature and oxygen. • LIU Chang-ming,ZHANGXian,XUQing,XIANFeng(College of Horticulture,Northwest A&F University,Yangling,Shaanxi 712100,China. AFLP Analysis on Dual Color Flower Gladiolus Mutants Induced by Radiation[J];ActaBotanicaBoreali-OccidentaliaSinica; 2009-01. • Dual color flower mutant and the control were related to the changes of genetic material, some of them may be related to the genes involved in flower color formation.

  7. Literature Review • James T. Midcap, Extension Horticulturist, University of Georgia, Athens. Hydrangea Flower Color, • In acidic soils, aluminum more available- binds to anthocyanin pigments producing blues • In alkaline soils, erratic aluminum uptake so pigments are pink.

  8. Research Purpose • To determine whether there is a difference in anthocyanin pathway genes expression that distinguish red color from white color in peach flowers. • Focused on six genes: ANS, CHS, CHI, DFR, F3H, UFGT

  9. Research: Identified Problem M 3RD PCR JUN 5TH RED FLOWER Figure 2. Amplification failed . Primer Annealing Temperature Taq Enzyme Specificity

  10. Methods • Re-configure the grouping of primers based on annealing temperatures • Use a higher Specificity Taq Enzyme vs Master Mix • Optimized the total cDNA to 50 ng per reaction

  11. Study Primers

  12. Methods: Final Modifications • RT-PCR total volume of 50 µl consist of the following: • 3 µl of cDNA (50 ng) Changed to: 1 µl of cDNA • 3 µl of primer (1.5 µl F/R) Changed to: 2 µl of primer • 30.7 µl of H2O Changed to: 34 µl of H2O • 5 µl of 10x Ex Taq Buffer Changed to: La Taq Buffer • 4 µl of dNTP Mix • 4 µl of MgCl2 (25mM) • 0.3 µl Ex Taq • Changed to: 0.3 µl La Taq Annealing Temp 58°C

  13. Results M M RED JUN 7TH NEW cDNAEXACT TM FOR PRIMERS WHITE JUN 7TH NEW cDNAEXACT TM FOR PRIMERS

  14. Clone Genes M Figure?

  15. Personal Goal: RNA Extraction CTAB • Objective: To extract total RNA from the Hydrangea using the RNA CTAB Protocol. • Sample Collection: Collected hydrangea flowers ; transfer to -80°C until RNA extraction. Petals were ground in liquid nitrogen in preparation for extraction.

  16. Methods: CTAB Protocol Overview • 0.5 g of Material add to 5ml CTAB extraction buffer  water bath,  plus 2% 2 -mercaptoethanol,  heated two 65 ° C placed in 10ml centrifuge tubes; then incubated at 65 ° water bath 15min. Centrifuged at room temperature 12000rpm 10min. • The supernatant is conserved and treated twice, with chloroform: isoamyl alcohol (24:1) solution . Centrifuged at room temperature 12000rpm 10min. • Add 1/4 volume of 10M LiCl; 4 ° overnight- next day, 4 ° 12000rpm centrifuge 20min • Discard supernatant, add 500ul SSTE dissolved about 10 minutes, transferred to 1.5ml tubes •  Add an equal volume of chloroform: isoamyl alcohol, vortex, mix, 4 ° 12000rpm centrifuge 10min; conserve the supernatant • Adding twice the volume of ethanol in the supernatant, placed in -70 °, 30min to 2 hours • 4 ° C, 12000rpm centrifuge 15-20min, the supernatant drained, dried at room temperature10min, adding appropriate amount of DEPC water (60ul) dissolved RNA, spare.

  17. Results

  18. Results

  19. Acknowledgements • National Science Foundation • Alabama A&M University/CREST • Nanjing Forestry University • Dr. K. Soliman, Advisor, AAMU • Dr. Y. Wang, Co-Advisor, AAMU • Ms. Lisa Gardner and Dr. Elica Moss

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