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ST. PAUL’S CO-EDUCATIONAL COLLEGE CHUI HO YIN PAUL CHAN YUN YIN CYRUS LEE WAI LAM BRYAN

Effects of UV-B on the growth of Vigna radiata ( 綠豆) , Vigna angularis ( 紅豆) and Glycine max ( 大豆). ST. PAUL’S CO-EDUCATIONAL COLLEGE CHUI HO YIN PAUL CHAN YUN YIN CYRUS LEE WAI LAM BRYAN. WHY!?!?!. Hey! Dear, I have a fabulous yield this year!!!.

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ST. PAUL’S CO-EDUCATIONAL COLLEGE CHUI HO YIN PAUL CHAN YUN YIN CYRUS LEE WAI LAM BRYAN

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  1. Effects of UV-B on the growth of Vigna radiata (綠豆), Vigna angularis (紅豆)and Glycine max (大豆) ST. PAUL’S CO-EDUCATIONAL COLLEGE CHUI HO YIN PAUL CHAN YUN YIN CYRUS LEE WAI LAM BRYAN

  2. WHY!?!?! Hey! Dear, I have a fabulous yield this year!!! Dad! We may get a poor yield next ten years!!!

  3. 光 禿 ? 禿

  4. Observations and facts Ozone concentrationdecreases • Higher amount of ultraviolet-B (UVB) radiation reaching the earth • cause harmful effects to the biosphere

  5. Literature ReviewThe effect of UVB on plants Negative impacts of UVBon Glycine max: • Decrease the areas and the number of leaves • Decrease height of the stems • Decrease the photosynthetic rates and the evaporation rate • Delay the growth process

  6. Problem?? Will the yield of the crops be reduced???

  7. Objectives • To find out the effect of UVB radiation on 3 types of plants (Vigna radiata 綠豆, Vigna angularis 紅豆andGlycine max 大豆) • To find out which of these three plants has stronger resistance to the damaging effect of UVB radiation

  8. Hypothesis Under extra UVB: The growth processes would be delayed Fewer leaves would be developed Shorter stems would be developed

  9. Methodology Set-up 1B Vigna angularis Set-up 2B Vigna angularis Set-up 2C Glycine max Set-up 1C Glycine max Set-up 1A Vigna radiata Set-up 2A Vigna radiata

  10. Variable Table

  11. Illumination treatment Setup 1 7:00 18:00 Sunlight Setup 2 Sunlight Sunlight 7:00 13:00 16:00 18:00 Sunlight + UV (300nm-400nm)

  12. Result Setup 1B Setup 1C Setup 1A

  13. Setup 2B Setup 2C Setup 2A

  14. Colour of leaves • Without extra UVB (Set-up 1): • green • With extra UVB (Set-up 2): • green → yellow → brown →black (died)

  15. CONCLUSION 1 • Under extra UVB: • Delayed germination • Delayed foliation • Fewer leaves developed • Shorter stems developed • Colour of the leaves changed from green to black

  16. WHY??

  17. Analysis • Set-up 2 • Green → Yellow → Brown →Black • Maybe UVB blocks some nutrients from being absorbed by plants • Slow down chlorophyll formation • Cause the deficiency and poor growth

  18. Further investigation • Measure the amounts of photodimer and photolyase before and after UVB illumination • Investigate the relationship between the UVB dosage and the amounts of photodimer formed • Investigate the effect of UVB on the photosynthetic rate of plants

  19. Which plant has the best resistance to UVB???

  20. 1 0.7 0.6

  21. Both Glycine max (大豆) & Vigna angularis(紅豆) had shown small difference

  22. 1 4 5

  23. Vigna radiata綠豆had the smallest difference

  24. 1 3 5

  25. Vigna radiata綠豆had the smallest difference

  26. 13 11.6 10.3

  27. Vigna radiata綠豆had the smallest difference

  28. Vigna radiata (綠豆)in the set-up with UVB died latest among three set-ups.

  29. The growth of Vigna radiata(綠豆)is least affected under extra UVB condition among the three plants Vigna radiata (綠豆)hasthe best resistance to UVB among the three plants (Vigna radiata, Vigna angularisandGlycine max)studied CONCLUSION 2

  30. Investigate the effect of UVB dosage on the growth of Vigna radiata (綠豆) Investigate whether Vigna radiata(綠豆)from different climatic regions show different resistance to UVB Further investigation

  31. In order to have a good harvest, is it more beneficial for me to grow Vigna radiata? I think…

  32. THANK YOU!!! Please protect our earth!!!!

  33. REFERENCE 1.二氧化碳, 臭氧, 紫外輻射與農作物生產─氣象出版社 2.Elevated Ultraviolet (UV)-B Radiation and Agriculture. Springer Press. 3. Plants and UV-B─Responses to Environmental Change. Cambridge University Press. 4. Ozone crisis: the 15-year evolution of a sudden global emergency. John Wiley and Sons Press. Websites 5.http://earthobservatory.nasa.gov/Library/UVB/ 6.http://www.bioon.com/biology/Class45/molecular/200406/53376.html

  34. 7.http://www.ciesin.org/docs/011-467/011-467.html8.http://www.mountcarmelhealth.com/healthinfo/Adult/skin/ultravio.shtml9.http://uvb.nrel.colostate.edu/UVB/plant_impact/intro.html10.http://www.epa.gov/safewater/mdbp/pdf/alter/chapt_8.pdf11.http://www.people.com.cn/BIG5/huanbao/56/20010913/559617.html12.http://www.npcc.gov.tw/nm-research/doctors/Concise_NM/%E7%AC%AC%E5%8D%81%E4%BA%8C%E7%AB%A0%20%20%20%E9%9B%BB%E9%9B%A2%E8%BC%BB%E5%B0%84%E7%9A%84%E7%94%9F%E7%89%A9%E5%AD%B8%E6%95%88%E6%87%89.htm13.http://www.stut.edu.tw/epc/epc5/06(final).ppt7.http://www.ciesin.org/docs/011-467/011-467.html8.http://www.mountcarmelhealth.com/healthinfo/Adult/skin/ultravio.shtml9.http://uvb.nrel.colostate.edu/UVB/plant_impact/intro.html10.http://www.epa.gov/safewater/mdbp/pdf/alter/chapt_8.pdf11.http://www.people.com.cn/BIG5/huanbao/56/20010913/559617.html12.http://www.npcc.gov.tw/nm-research/doctors/Concise_NM/%E7%AC%AC%E5%8D%81%E4%BA%8C%E7%AB%A0%20%20%20%E9%9B%BB%E9%9B%A2%E8%BC%BB%E5%B0%84%E7%9A%84%E7%94%9F%E7%89%A9%E5%AD%B8%E6%95%88%E6%87%89.htm13.http://www.stut.edu.tw/epc/epc5/06(final).ppt

  35. “Heating effect” of UVB is negligible……..

  36. The acrylic box

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