Effect of Gamma Rays Radiation on Growth of Corn

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APPENDIX
Table 7.1. Mean heights (in cm) of Corn (Zea mays) plants irradiated with 50kr, 30kr, 10kr and no gamma rays. AGE (days)| Control| 10kr| 30kr| 50kr|
1| 2.74| 2.3| 1.6| 1.3|
3| 9.99| 9.96| 6.39| 3.69|
6| 17.25| 6.95| 9.94| 5.4|
8| 21.15| 19.17| 12.63| 6.5|
10| 27| 23.22| 14.19| 8.2|
13| 30.76| 27.93| 15.03| 8.65|
15| 29.5| 26.95| 16.81| 7.63|
17| 33.85| 33.83| 15.69| 8.5|
19| 38.33| 44.83| 16.94| 8.5|
21| 34.4| 48.5| 17.93| 0|
23| 42.95| 54.88| 19.86| 0|
26| 45.33| 59.45| 24.93| 0|
28| 63.13| 71.94| 30| 0|
30| 73.07| 81| 36| 0|
33| 79.24| 91.24| 41.38| 0|
35| 88.21| 98.31| 44.4| 0|
37| 84| 100.25| 52.88| 0|
40| 86.26| 112.16| 57.23| 0|
42| 96.59| 115.54| 68.26| 0|
44| 97.29| 117.31| 73.5| 0|
47| 98.57| 118.41| 73.58| 0|
49| 103.60| 119.78| 73.88| 0|
51| 106.70| 121.88| 74| 0|
54| 106.74| 123.4| 76.25| 0|
56| 106.92| 125.5| 77.87| 0|
58| 107.09| 127.44| 79.12| 0|

Table 7.2. Germination Rate (%) of Corn (Zea mays) exposed in different doses of gamma rays radiation. Treatment| Germination rate (%)|
Control| 80|
10kr| 60|
30kr| 70|
50kr| 20|

Table 7.3 Mortality/Survival Rate (%) of Corn (Zea mays) exposed in different doses of gamma rays radiation. Treatment| Mortality/Suvival rate (%)|
Control| 80|
10kr| 80|
30kr| 40|
50kr| 0|

The Effect of Various Doses of Gamma Rays
Radiation on the Growth of Corn (Zea mays)1

Priscilla Danielle S. Ilagan
Section A-7L

March 23, 2012

1 A scientific paper submitted in partial fulfilment of the requirements in Biology 30 Genetics Laboratory under Ms. Fides Marie R. dela Cruz, 2nd semester, A.Y. 2011-2012 ABSTRACT
The effect of various doses of Gamma Rays Radiation on the growth of Corn (Zea mays) was determined by observing the growth of the seeds in 4 different plots. 40 seeds were exposed to different doses (50kr, 30kr, 10kr and none) of Gamma Rays Radiation. The treatment with the highest dose of radiation gained the lowest germination rate and survival rate of 20% and 0%, respectively and the treatment with 10kr of radiation gained the highest germination and survival rate of all treatments, excluding the control, with values of 60% and 80%, respectively. Therefore, too much dose of gamma rays radiation will increase the Mortality rate of Zea mays.

INTRODUCTION
Zea mays, commonly called as corn, is under Phylum Magnoliophyta, family Poales. Corn is a widely cultivated cereal grain in Central America. It is the most important and economical source of starch in the United States. The corn plant has its male and female parts separate and they belong to the C4 plants. (Nemose, 2008)

Mutations, according to Barrion, et.al, are changes in the genetic material that are heritable and permanent. It could result to deteriorations and serious consequences to those of the next generations. It is also a source for genetic variations needed for evolutionary changes and may also cause death among other cases.

Mutations can be classified as spontaneous or induced, which are caused by chemical or physical agents. These agents include being exposed in gamma rays Radiation. (Barrion, et.al, 2005)
Ionizing Radiation is the type of radiation emitted by radioactive materials that causes direct damage to an organism’s DNA that will eventually result to mutations, such as beta radiation. Ionizing radiation leads to double-stranded breaks in the DNA so both sides of the DNA will be broken in a specific part. This gap will be patched up connecting the left DNA strands together. This reattachment to the wrong side leads to the deletion of important genes and changes the overall message of the DNA strand. This mutation leads to numerous consequences, such as Leukemia. (Tremblay, 2012)

But Ionizing Radiation in plants can also improve its...
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